Gripper Cutting Plate Driver Pin Force Transmission
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Solution Overview
Problem
Conventional grippers with cutting devices for processing machines face challenges in achieving high mechanical load capacity and reducing wear, while maintaining a compact design and minimizing weight and energy consumption, especially when retrofitting with a cutting device that increases size and weight.
Innovation Solution
The gripper design incorporates a pivotably mounted cutting plate with a driver pin connected to the piston-cylinder unit, where the driver pin transmits forces directly to the base part, relieving load from the piston rod and bearings, and using ball bearings in a link guide to manage movement and reduce friction, allowing for compact and efficient force dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the piston-cylinder unit is dimensioned to absorb high cutting forces, then the load capacity is improved, but the weight and size of the gripper increase
Solution Approach 1:
The invention extracts the force absorption function from the piston-cylinder unit and transfers it to the driver pin and abutment structure. The driver pin is designed to directly bear and transmit cutting forces to the base part, while the piston-cylinder unit only needs to provide positioning and movement control, significantly reducing its dimensioning requirements and thus the overall gripper weight.
Solution Approach 2:
Instead of having the piston-cylinder unit bear the cutting forces directly, the invention inverts the force transmission path by having the driver pin and abutment structure bear the forces first, then transmit them to the base part. This reversal allows the piston-cylinder unit to be much smaller while maintaining high load capacity.
2Ease of operation
If sliding or rolling bearings are used to support the cutting plate, then the mobility is improved, but the wear increases and service life decreases
Solution Approach 1:
The invention extracts the force-bearing function from the bearings and transfers it to the driver pin and abutment structure. The bearings are relieved of load and only need to provide guidance and positioning, which dramatically reduces their wear and extends service life while maintaining cutting plate mobility.
Solution Approach 2:
The driver pin acts as an intermediary element that transfers forces from the cutting plate to the abutment structure, protecting the bearings from direct load. This intermediary mechanism allows the bearings to maintain mobility without suffering from high-stress wear.
3Strength
If the cutting device is designed for high load capacity, then the mechanical strength is improved, but the device complexity increases
Solution Approach 1:
The invention merges the force transmission and positioning functions into a unified driver pin-abutment structure. The driver pin serves multiple purposes: it transmits cutting forces to the abutment, guides the cutting plate movement, and works with the piston-cylinder unit for positioning. This functional integration reduces the number of separate components and simplifies the overall device structure.
Solution Approach 2:
The driver pin is designed as a multi-functional component that simultaneously handles force transmission, guidance, and positioning tasks. The abutment structure also serves multiple purposes by providing force absorption, structural support, and geometric constraints. This multi-functionality reduces device complexity while maintaining high load capacity.
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
This design enhances the load capacity and reduces wear of the cutting device, enabling a more compact gripper that can be retrofitted with a cutting device, maintaining mobility and reducing energy consumption.
Implementation Method 1
the driver pin transmits forces directly to the base part, relieving load from the piston rod and bearings
Implementation Method 2
using ball bearings in a link guide to manage movement and reduce friction
Data Source
AI summary
A gripper having at least two gripper arms movably arranged in a pincer-like manner on a base part and a cutting device for material to be cut for attachment to a processing machine, wherein the cutting device is formed by a cutting plate, which is movable by a piston-cylinder unit from an active position, in which the cutting plate projects into a receiving space for the material to be cut enclosed by the gripper arms, into an inactive position, in which the cutting plate is retracted in the base part. The retractable and extendable piston rod of the piston-cylinder unit is connected to the cutting plate via a driver pin which, in the active position of the cutting plate, rests against an abutment of the base part when the cutting plate is loaded.