Pneumatic Parallel Gripper Linkage Synchronization
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Solution Overview
Problem
Conventional parallel grippers require high precision and costly components for synchronized motion, making them expensive to manufacture and maintain, and are not suitable for applications in liquid environments.
Innovation Solution
A pneumatically driven parallel gripper with a linkage system that uses bushings and bolts for synchronization, eliminating the need for tight tolerances and high precision parts, and allowing for easy maintenance and adaptation for use in various applications, including underwater robotics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional parallel grippers use high precision components for synchronized motion, then motion synchronization is improved, but manufacturing cost and maintenance cost increase
Solution Approach 1:
The patent replaces complex mechanical synchronization mechanisms (rack and pinion, belt drives, cam mechanisms) with a pneumatic system. Two pneumatic cylinders receive pressurized air simultaneously, causing their pistons to move in unison. This substitution eliminates the need for high-precision mechanical components while achieving synchronized jaw motion through fluid power transmission.
Solution Approach 2:
The patent employs universal pneumatic cylinders that can be manufactured with standard tolerances and used for synchronized motion control. These pneumatic actuators serve multiple functions: providing both the driving force and the synchronization mechanism simultaneously, eliminating the need for separate precision mechanical synchronization components.
2Manufacturing precision
If conventional parallel grippers use high precision components for synchronized motion, then motion synchronization is improved, but maintenance cost increases
Solution Approach 1:
By replacing precision mechanical synchronization components with pneumatic cylinders, the patent reduces maintenance requirements. Pneumatic systems have fewer moving parts subject to wear, no gear teeth to break, no belts to snap, and no cams to wear. The main maintenance task becomes simple air filter replacement rather than complex mechanical component repair.
Solution Approach 2:
The patent employs inexpensive pneumatic cylinders that can be easily replaced if needed, rather than expensive precision mechanical components that require costly repair or recalibration. The simplicity and low cost of pneumatic actuators make them ideal for applications where maintenance accessibility is important.
3Manufacturing precision
If conventional parallel grippers are designed for high precision operation, then synchronization accuracy is improved, but adaptability to different environments deteriorates
Solution Approach 1:
The patent replaces precision mechanical systems with pneumatic systems that are inherently more adaptable to different environments. Pneumatic cylinders can operate in dusty, humid, or corrosive conditions where precision mechanical components would fail or require extensive protection. The pneumatic system's tolerance to environmental variations enables deployment in diverse settings including underwater applications.
Solution Approach 2:
The patent utilizes the compressibility of pneumatic air to provide inherent damping and flexibility in the synchronization mechanism. This allows the system to adapt to varying loads and environmental conditions without requiring precise mechanical adjustments. The pneumatic system can accommodate thermal expansion, moisture, and pressure variations that would affect precision mechanical components.
Data Source
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AI summary
Technologies are generally described for pneumatically actuated parallel grippers that include a frame, a linkage system, two pistons, and a pair of slidable plates. The linkage system includes three or more links comprising a central link that is pivotably coupled to the frame, a first link coupled between a first piston and a first end of the central link, and a second link coupled between a second piston and a second end of the central link. The linkage system is arranged to synchronize motion between the first and second pistons. The pistons are further coupled to the slidable plates such that synchronized movement of the pistons translates into synchronized motion of the slidable plates. The parallel gripper is readily adaptable for use in gripper applications; and it is simple to service without the necessity for costly high tolerance and high precision parts.