Elastomeric Snap-Fit Gripper Coupling for Delta Robots
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Solution Overview
Problem
Existing systems for attaching grippers to delta robots are complex and require tools for screwing, and the coupling devices are often expensive and difficult to use for quick gripper changes.
Innovation Solution
A device with a receiving unit and a coupling unit that utilize complementary shaped elements and a clamping mechanism, allowing for easy alignment and secure attachment without the need for tools, using a form-fit design that ensures correct orientation and simplifies the attachment process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a screw connection is used to attach the gripper to the robot, then the attachment is secure and reliable, but the operation becomes complex and requires tools for tightening
Solution Approach 1:
The patent replaces the screw-based mechanical fastening system with a snap-fit mechanism using elastomeric material. The elastomeric receiving element deforms elastically to receive the coupling element and then snaps into a locked position, eliminating the need for screws and tools while maintaining secure attachment.
Solution Approach 2:
The patent utilizes elastic deformation as a key parameter change. The elastomeric receiving element changes its physical state from flexible to rigid during the attachment process, transitioning from a deformed state during insertion to a locked state that provides secure retention without requiring threaded fasteners.
2Reliability
If a bolt with lever actuation is used to secure the gripper, then the attachment is reliable, but the device complexity increases and production costs rise
Solution Approach 1:
The patent replaces the bolt-and-lever mechanical system with an elastomeric snap-fit mechanism. The elastic deformation and recovery of the elastomeric material provide the locking action without requiring bolts, levers, or complex actuation mechanisms, thereby simplifying the overall device structure.
Solution Approach 2:
The patent employs an elastomeric receiving element that utilizes the flexibility and elasticity of polymer materials. This flexible element deforms to accommodate the coupling element during insertion and then snaps into a locked configuration, providing reliable attachment through material properties rather than complex mechanical structures.
3Reliability
If traditional screw fastening is used, then the connection is secure, but the time required for gripper changes increases
Solution Approach 1:
The patent replaces time-consuming screw fastening operations with a rapid snap-fit mechanism. The elastomeric receiving element automatically locks the coupling element in place through elastic deformation, eliminating the need for manual screw tightening and enabling quick gripper changes without compromising connection security.
Solution Approach 2:
The elastomeric receiving element performs the fastening function automatically through its elastic properties. When the coupling element is inserted, the elastomeric material deforms and then snaps into a locked position, providing self-securing attachment without requiring external tools or manual tightening operations.
Data Source
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AI summary
The device (10) comprises a receiving unit (11) and a coupling unit (25), between which a positive or force-fit connection unit is provided. The receiving unit comprises a stop unit (15) provided with a rear section for receiving a portion (27) of the coupling unit. The receiving unit and the coupling unit have complementary mold elements (13,29), which are adapted to be inserted into one another. The receiving unit comprises a clamping element for holding the coupling unit in the stop unit of the receiving unit. An independent claim is included for a method for detachably fastening a gripper to a robot, particular a delta-robot.