Manual Crimping Tool Linkage for Reliable Die Alignment
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Solution Overview
Problem
Existing manually operable pressing tools are complex and lack reliability in their pressing mechanism, particularly in the interaction between the crimping die and die receptacle.
Innovation Solution
A simplified design with pivotably connected manual levers and a crimping unit, featuring a crimping die and die receptacle, allows for a downward movement of the crimping die into the die receptacle upon closure, facilitated by a force storage element and a retaining pawl to maintain the open position, with adjustable pivot axes and an insertion aid for precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional pressing tool design with upward pivotal movement of the lower pressing jaw is used, then the structure is proven reliable over time, but the device complexity increases and the pressing mechanism becomes less reliable
Solution Approach 1:
The patent inverts the conventional pressing mechanism by implementing downward movement of the crimping die into the die receptacle instead of the traditional upward pivotal movement of the lower pressing jaw. This inversion simplifies the overall structure while maintaining reliable pressing through the downward motion path enabled by the pivotable connection between manual levers and the node element
2Manufacturing precision
If the crimping die and die receptacle are fixed in position, then the alignment is precise, but the adaptability to different wire end ferrule diameters is reduced
Solution Approach 1:
The patent implements dynamic adjustability by guiding the fourth pivot axis through an elongated hole in the head area of the second manual lever, allowing the pivot axis position to be adjusted along the elongated hole to accommodate different wire end ferrule diameters while maintaining precise alignment through the insertion aid and bevel
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
Enables simple and reliable pressing operations with improved alignment and adjustable crimping depth, ensuring consistent crimping quality without premature opening.
Implementation Method 1
a force storage element that pushes the second manual lever into an open position is fixed between the head area of the first manual lever and the node element close to the second pivot axis. The force storage element abuts an outer wall of the die receptacle and preferably is configured as a pressure spring.
Implementation Method 2
a node element which pivotably connects a first pivot axis and a second pivot axis to one another via the manual lever. The fork neck is pivotably coupled to the first manual lever via a third pivot axis. The second fork finger is pivotably coupled to the second manual lever via a fourth pivot axis.
Data Source
AI summary
A manually operated pressing tool has a first manual lever, a second manual lever, a node element pivotably connecting the two manual levers to one another via a first pivot axis and a second pivot axis and a crimping unit arranged on a head portion of the pressing tool. The crimping unit includes a crimping die and a die receptacle. The first and second manual levers are further coupled to one another via a fork element which has a fork neck, a first fork finger and a second fork finger. The fork neck is pivotably coupled to the first manual lever via a third pivot axis. The crimping die is arranged on the first fork finger and the die receptacle is arranged on a head portion of the first manual lever, The second fork finger is pivotably coupled to the second manual lever via a fourth pivot axis.