Interchangeable Work Heads With Quick Release Coupling
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Solution Overview
Problem
Conventional hydraulic work tools face challenges in ease and reliability of interchangeable work heads, with a need for secure and proper attachment to ensure effective operation.
Innovation Solution
A hydraulic system with a quick release coupling and biasing provisions, including a ram piston and compression type springs, allows for easy attachment and detachment of interchangeable work heads, ensuring secure engagement and alignment with the work tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a detachable work head system is used to enable different applications with one work tool, then adaptability is improved, but reliability of attachment is worsened
Solution Approach 1:
The work head is nested within the tool body through a telescoping engagement mechanism. The work head includes an engagement portion that inserts into a receptacle on the tool body, with guide surfaces ensuring proper alignment. This nesting arrangement allows the work head to be securely housed within the tool while maintaining reliable connection through the interlocking engagement features.
Solution Approach 2:
The engagement mechanism incorporates preliminary alignment features including guide surfaces and positioning elements that automatically align the work head with the tool body during attachment. The biasing member pre-positions the work head in the retracted state, ensuring proper engagement before actuation occurs.
2Ease of operation
If a quick release coupling is used to facilitate easy attachment and detachment, then ease of operation is improved, but secure engagement is worsened
Solution Approach 1:
The coupling mechanism transitions from a static connected state to a dynamic quick-release state through actuation of the release member. The biasing member dynamically maintains the work head in the retracted position until actuated, providing both ease of operation and secure engagement through the controlled dynamic transition between states.
Solution Approach 2:
The release member acts as an intermediary that mediates between the user's action and the disengagement of the work head. When actuated, it triggers the release mechanism that allows the biasing member to return the work head to the retracted position, providing easy operation while maintaining secure engagement during normal use.
3Manufacturing precision
If the ram piston extends beyond the quick release coupling when retracted, then alignment and engagement are improved, but device complexity is worsened
Solution Approach 1:
The piston assembly is segmented into the ram piston and the elongated member as separate functional components. The elongated member extends beyond the quick release coupling to provide alignment features, while the ram piston remains within the tool body. This segmentation allows the alignment function to be provided by the elongated member without requiring the entire piston assembly to extend, thereby reducing overall device complexity.
Solution Approach 2:
The elongated member acts as an intermediary between the ram piston and the work head engagement interface. It extends the functional reach of the piston assembly to provide alignment and engagement features at the coupling interface without requiring the main piston body to extend beyond the tool housing, thus maintaining compact overall dimensions while achieving precise alignment.
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 enables simple, reliable, and secure interchangeability of work heads, enhancing the usability and efficiency of hydraulic tools by facilitating easy attachment and detachment while maintaining proper alignment and engagement.
Implementation Method 1
biasing provisions associated with the ram piston and configured to bias the ram piston to the fully retracted position
Implementation Method 2
a compression type spring mounted on the ram piston
Data Source
AI summary
A hand-held hydraulic assembly includes a work tool having a hydraulic cylinder or main body, a ram piston disposed in the hydraulic main body and a spring or other biasing member mounted on the ram piston. An interchangeable work head is selectively engaged to the ram piston of the work tool. The ram piston is axially displaceable in the main body for actuating the work head. A quick release coupling mounted to the work tool releasably connects the interchangeable work head to the work tool.