Robot Hand Posture Control via Auxiliary Portion
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Solution Overview
Problem
Conventional robots do not consider the change in posture of target objects during assembly, leading to increased time and effort in structure assembly as the posture of the target object often needs to be changed multiple times, which is inefficient.
Innovation Solution
A robot hand with a hand unit that includes a suction pad and a support portion, along with an auxiliary portion, allowing the robot to grip and change the posture of the target object while maintaining a non-contact state initially, and then coming into contact to restrict rotation and prevent separation, facilitating efficient posture change and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional robot grips a target object using a simple gripper, then the gripping operation is simple, but the robot cannot efficiently change the posture of the target object during assembly
Solution Approach 1:
The robot hand is divided into three functional segments: a body portion with suction pad for gripping, a support portion for structural stability, and an auxiliary portion for posture control. This segmentation allows each part to perform its specific function efficiently, resolving the contradiction between assembly efficiency and structural complexity.
Solution Approach 2:
The robot hand integrates multiple functions into a single device: gripping the target object, maintaining grip during movement, and controlling posture changes. The auxiliary portion specifically enables posture control while the suction pad maintains gripping force, allowing the robot to perform multiple operations without manual intervention and improving assembly efficiency.
2Reliability
If the robot hand maintains constant contact with the target object during posture change, then the grip is secure, but the suction force decreases due to vacuum breakdown
Solution Approach 1:
The auxiliary portion is positioned in advance to contact the target object before posture change begins. This preliminary contact prevents rotation and maintains the suction pad's effective contact with the target object, ensuring grip stability without requiring increased suction force.
Solution Approach 2:
The auxiliary portion acts as an intermediary element between the robot hand and the target object during posture changes. It provides additional contact points that stabilize the object without interfering with the suction pad's vacuum seal, thereby maintaining grip reliability while preserving suction force.
3Ease of operation
If the robot changes the posture of the target object manually, then the posture control is precise, but the assembly process requires manual intervention and takes more time
Solution Approach 1:
The robot hand performs posture control autonomously using the auxiliary portion, which automatically contacts and stabilizes the target object during posture changes. This self-service capability eliminates the need for manual intervention while maintaining precise posture control, thereby reducing assembly time without sacrificing operational precision.
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 robot hand efficiently changes the posture of the target object without requiring manual intervention, reducing assembly time and effort by maintaining a secure grip and preventing vacuum breakdown, thus enhancing manufacturing efficiency.
Implementation Method 1
a suction pad configured to suck the second member to grip the target object
Data Source
AI summary
A robot hand includes: a hand unit that grips a target object including a first member in a first direction and a second member in a second direction; and a control unit that controls the hand unit. The hand unit includes: a body portion including a suction pad that sucks the second member to grip the target object and a support portion that supports the suction pad; and an auxiliary portion provided to be opposed to the body portion when the suction pad grips the target object. When the suction pad grips the target object, a distance in the second direction between an axis of the suction pad and the auxiliary portion is larger than a distance in the second direction from the axis to a surface of the first member on a side opposite to a surface of the first member brought into contact with the second member.