Anti-Rotation Insert for Pneumatic Suction Cup Support
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Solution Overview
Problem
Current support devices for pneumatically operated prehensile members, such as suction cups, have complex structures that increase production costs and are often unreliable, especially when handling heavy loads, due to their complex anti-rotation mechanisms which lead to frequent breakdowns.
Innovation Solution
A support device with a simplified anti-rotation mechanism featuring a single-piece anti-rotation insert made of self-lubricating plastic, which is easily assembled and provides a large contact surface to distribute torsion, preventing rotation of the stem with respect to the main body, thus enhancing stability and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex anti-rotation mechanism is used, then the reliability of the support device improves, but the device complexity and production costs increase
Solution Approach 1:
The anti-rotation mechanism is segmented into a simple insert component that fits into the stem, separating the anti-rotation function from the main stem structure. This segmentation allows for easier manufacturing and replacement while maintaining reliability.
Solution Approach 2:
The anti-rotation insert is designed as a simple, inexpensive component that can be easily replaced if worn. Using a simple plastic insert with lubrication allows for cost-effective production while maintaining functional reliability through easy replacement rather than complex design.
2Reliability
If a complex anti-rotation mechanism is used, then the reliability of the support device improves, but the production costs increase
Solution Approach 1:
The anti-rotation insert is designed as a simple, inexpensive component that can be easily replaced if worn. Using a simple plastic insert with lubrication allows for cost-effective production while maintaining functional reliability through easy replacement rather than complex design.
Solution Approach 2:
The anti-rotation function is extracted as a separate insert component from the main stem structure. This extraction allows the insert to be manufactured independently using simpler, more cost-effective processes while maintaining the reliability of the overall anti-rotation function.
3Device complexity
If a simple anti-rotation insert is used, then the device complexity and production costs decrease, but the reliability may worsen due to frequent breakdowns
Solution Approach 1:
The insert is designed with self-lubricating properties through material selection (plastic with inherent lubrication) and geometric features (lubrication groove). This self-service approach ensures continuous reliable operation without requiring external lubrication systems or complex maintenance mechanisms.
Solution Approach 2:
The reliability is improved by changing the material parameter of the insert to self-lubricating plastic and modifying the geometric parameters to include a lubrication groove. These parameter changes enable the simple insert design to achieve reliable operation under heavy loads without complex mechanisms.
4Strength
If the contact surface area is increased, then the distribution of torsion forces improves, but the device complexity increases
Solution Approach 1:
The contact surface is segmented into multiple discrete contact zones along the cylindrical interface between the insert and stem. This segmentation distributes the torsion forces across multiple points while maintaining a simple cylindrical geometry that does not increase device complexity.
Solution Approach 2:
The contact surface is extended into the axial dimension, creating a long cylindrical contact interface between the insert and stem. This dimensional extension distributes torsion forces along the length of the insert without requiring complex multi-dimensional geometries.
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 solution reduces the risk of breakage and improves the reliability of the support device, allowing it to effectively handle heavy loads without detachment of the suction cup, while maintaining a cost-effective production process.
Implementation Method 1
a single-piece anti-rotation insert (30) made of self-lubricating plastic
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A support and vacuum power device for a pneumatic prehensile member (100), such as a suction cup, comprises a casing (3) and a sleeve (8) protruding from said casing and wherein at least one recess (10) is formed. A movable element (12) is movable in translation in the casing (3) and is provided with a power supply duct (18). The movable element (12) comprises a stem (26) guided in translation in the sleeve (8). An anti-rotation insert (30) made in a single body is inserted into the sleeve through the recess and is provided with a through opening (32) slidably engaged by the stem (26). The through opening is defined by at least one contact surface (34) extended for an effective contact with an engagement portion (28) of the movable element (12), thus achieving an anti-rotation constraint for said movable element (12).