Robot Arm Gripper Buffering for Irregular Object Collisions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Robot arm grippers face efficiency degradation due to collisions with protrusions and irregularly stacked objects, leading to damage and inefficient gripping of atypical objects like bearings and electronic parts.
Innovation Solution
A robot arm gripper device with a grip unit, power transmission unit, and buffer unit, where the power transmission unit is movable on the buffer unit, allowing for hinge movement and relative rotation, and equipped with a sensor to measure elastic force for controlling the driving of the robot arm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a robot arm gripper operates in a site with randomly stacked objects and protrusions, then the gripper can access various objects, but collision occurs leading to degraded operation efficiency and potential damage
Solution Approach 1:
The patent introduces a buffer unit with elastic elements (springs or rubber) positioned between the power transmission unit and the robot arm body. This cushioning mechanism is designed in advance to absorb impact forces when the gripper collides with protrusions or irregularly stacked objects, preventing damage to the robot arm and maintaining operational reliability without sacrificing accessibility.
2Reliability
If the power transmission unit is made movable on the buffer unit, then impact buffering capability is improved, but device complexity increases
Solution Approach 1:
The gripper device is segmented into distinct functional units: the grip unit, the power transmission unit, and the buffer unit. The power transmission unit is made movable relative to the buffer unit, allowing independent optimization of each component. This segmentation enables the buffer unit to specifically handle impact absorption while the power transmission unit focuses on power delivery, resolving the contradiction between reliability and complexity through functional separation.
3Reliability
If the buffer unit is made rotatable with respect to the robot arm body, then collision avoidance is improved, but device complexity increases
Solution Approach 1:
The buffer unit is designed with rotational freedom relative to the robot arm body, transforming it from a static to a dynamic component. This dynamic capability allows the buffer unit to rotate and adjust its orientation when encountering obstacles or protrusions, enabling the gripper to avoid collisions by changing its approach angle. The rotational degree of freedom provides adaptability without requiring complex active control mechanisms.
4Measurement precision
If a sensor unit is added to measure elastic force of the buffer unit, then collision detection and control precision are improved, but device complexity and cost increase
Solution Approach 1:
A sensor unit is integrated into the buffer unit to measure the elastic force generated during buffering operations. This feedback mechanism provides real-time information about collision magnitude and buffer compression state, enabling the control system to adjust the robot arm's driving parameters dynamically. The feedback loop allows for precise collision detection and control while maintaining relatively simple hardware through the use of standard force sensing elements.
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
Stable gripping of atypical objects is achieved while buffering impacts, preventing damage from collisions by relative rotation and controlled driving, ensuring efficient operation in varied environments.
Implementation Method 1
a buffer unit having one side connected to the power transmission unit and another side connected to a robot arm body, wherein the power transmission unit is movable on the buffer unit
Implementation Method 2
a grip unit capable of gripping an object by a hinge movement
Implementation Method 3
a buffer unit is capable of relative rotation with respect to the robot arm body
Data Source
AI summary
According to an aspect of the disclosure, a robot arm gripper device includes a grip unit capable of gripping an object by a hinge movement, a power transmission unit coupled to the grip unit and transmitting power to the grip unit, and a buffer unit having one side connected to the power transmission unit and another side connected to a robot arm body, wherein the power transmission unit is movable on the buffer unit.