Unidirectional Suction Valve for Lighter Robotic End Effectors
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Solution Overview
Problem
Existing robotic end effectors using bi-directional valves for suction-based operations are bulky, complex, and heavy, exceeding weight limits, reducing payload capacity and increasing complexity, while bi-directional valves allow fluid flow in both directions, which is not optimal for efficient package handling.
Innovation Solution
Implementing unidirectional valves at the end effector that allow suction pressure to flow in one direction only, actuated by positive pressure, with a movable piston mechanism to control suction cup activation and deactivation, reducing weight and complexity, and enabling faster package handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bi-directional valves are used for suction control in robotic end effectors, then reliable suction control is achieved, but the valve becomes bulky, complex, and heavy, exceeding weight limits
Solution Approach 1:
The patent extracts the unnecessary bidirectional flow control capability from the valve system. By using unidirectional valves that only allow flow in one direction (from the suction source to the suction cups), the system eliminates the need for complex bidirectional control mechanisms while maintaining reliable suction control through simple pressure differential operation.
Solution Approach 2:
Instead of using complex bidirectional valves that control flow in both directions, the patent inverts the approach by using simple unidirectional valves that allow flow in only one direction. The control mechanism is inverted from active bidirectional control to passive unidirectional flow with automatic closure when pressure differential is removed.
2Adaptability or versatility
If bi-directional valves are used for suction control, then comprehensive flow control is achieved, but device complexity increases
Solution Approach 1:
The patent removes the complex bidirectional flow control functionality and retains only the essential unidirectional flow control needed for suction operation. This extraction of unnecessary complexity results in simpler valve design while maintaining adequate flow control through pressure differential-based operation.
Solution Approach 2:
The valve system is segmented into simple unidirectional flow paths rather than complex integrated bidirectional control mechanisms. Each valve handles flow in one direction only, simplifying the overall system architecture while maintaining versatile suction control through independent activation of individual suction cups.
3Ease of operation
If bi-directional valves are used, then complete suction control is achieved, but payload capacity is reduced due to weight
Solution Approach 1:
The patent extracts the heavy bidirectional valve components and replaces them with lightweight unidirectional valves. This extraction of unnecessary weight while retaining essential suction control functionality directly increases the payload capacity of the robotic end effector.
4Productivity
If unidirectional valves are used, then weight and complexity are reduced, but faster package handling is enabled through quicker activation and deactivation
Solution Approach 1:
The patent inverts the traditional valve control approach by using unidirectional valves that automatically close when the pressure differential is removed, rather than requiring active control to maintain closure. This inversion enables faster activation and deactivation cycles, improving package handling speed while reducing mechanical complexity.
Solution Approach 2:
The unidirectional valves are designed to automatically close and open based on the pressure differential generated during suction operation, eliminating the need for complex external control mechanisms. This self-regulating behavior enables rapid response times for package handling while keeping the valve mechanism simple and reliable.
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 unidirectional valves facilitate lighter, more compact, and less restrictive suction control, maintaining payload capacity and improving handling efficiency by allowing faster activation and deactivation of suction cups, thus enhancing robotic arm performance.
Implementation Method 1
a movable piston to open or close the flow path. The piston is actuated by positive pressure
Implementation Method 2
Implementing unidirectional valves at the end effector that allow suction pressure to flow in one direction only
Implementation Method 3
An end effector may correspond to a tool that may be connected to an end of a robotic arm and that may be suitable for manipulating items. For example, some end effectors have suction cups capable of applying a vacuum or suction force on an item. The vacuum force may draw the item to the suction cups.
Data Source
AI summary
A robotic system can include or be coupled with an end effector assembly. The end effector may include multiple of suction cups configured to individually receive suction pressure (e.g., from a shared vacuum source), and a set of unidirectional valves coupled to the multiple suction cups to individually control supply or cut-off of the suction pressure to an individual suction cup of the plurality of suction cups. Each of the unidirectional valves may include a first flow path to convey the suction pressure from the source of suction pressure to the suction cup, and a second flow path extending between a suction cup to the atmosphere. The valve can be configured to switch between the first flow path and the second flow path to activate or deactivate the individual suction cup.