Hydraulic Pincers Nested Press Ram for Compact Height
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Solution Overview
Problem
Existing hydraulic processing grippers have a relatively large overall height due to the size of the pressure transfer element, which is equal to or greater than the stroke of the press ram, limiting their compactness while maintaining functionality.
Innovation Solution
The press ram is accommodated partially within the pressure cylinder or piston rod in its retracted position, allowing for a reduced overall height and simplified design by using a radially movable pressure cylinder, which transfers force to the press ram through a movable pressure-transmitting element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pressure transfer element size is made equal to or greater than the press ram stroke to ensure proper force transfer, then the force transmission reliability is improved, but the overall height of the device increases
Solution Approach 1:
The press ram is nested within the pressure cylinder when retracted, with the press ram positioned inside the cylindrical bore of the pressure cylinder. This nesting arrangement allows the pressure transfer element to be significantly shorter than the press ram stroke, as the press ram extends into the pressure cylinder during retraction rather than requiring external space equal to its full stroke length.
Solution Approach 2:
The invention transitions from a linear arrangement where the pressure transfer element length must match the press ram stroke to a three-dimensional arrangement where the press ram can be positioned within the cylindrical space of the pressure cylinder. This spatial reconfiguration in multiple dimensions allows compact integration while maintaining full stroke capability.
2Length of stationary object
If a radially movable pressure cylinder is used to transfer force to the press ram, then the overall height is reduced, but the device complexity increases due to high pressure force transfer requirements
Solution Approach 1:
A pressure element serves as an intermediary component between the pressure cylinder and the press ram. This pressure element is movable in the radial direction and facilitates force transfer from the pressure cylinder to the press ram, enabling compact radial force transmission while protecting the press ram from direct exposure to extreme pressure forces.
Solution Approach 2:
The pressure cylinder and pressure element are designed to be radially movable rather than fixed, allowing dynamic adjustment of the force transfer path. This mobility enables the system to adapt to different operational states (pressing vs. retraction) while maintaining compact dimensions, as the components can shift radially to accommodate force transfer requirements without increasing overall height.
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 achieves a more compact form factor with reduced overall height while maintaining the ability to apply high forces for processing, simplifying the design and reducing complexity under high pressure conditions.
Implementation Method 1
a hydraulic actuating device for applying a force to the tool plunger via a movable pressure-transmitting element, the force moving the tool plunger in the direction of the work rest
Data Source
AI summary
The invention relates to a novel design of hydraulic processing pincers for processing workpieces, with a tool which, in a first tool part, has an axially displaceable tool plunger which, with a first end or with a tool provided there and an opposite work rest, forms a working region or a working gap and can be moved with the first end towards and away from the work rest, and made up of a hydraulic actuating device for applying a force to the tool plunger via a movable pressure-transmitting element, said force moving said tool plunger in the direction of the work rest. The piston and/or the piston rod are/is designed with a cavity in which the tool plunger is accommodated in its initial position at least over part of its length.