Pipe Fitting Pressing Tool With Spindle Drive Feedback
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Solution Overview
Problem
Existing pressing tools for pipe connections are complex, costly, and difficult to operate, often requiring manual reversal and lacking clear feedback on completion, with a risk of applying excessive force that can damage fittings or connections.
Innovation Solution
A pressing tool with pivotable lever sections and a spindle nut that allows for continuous movement in both directions, enabling complete pressing strokes without returning to the starting position, and featuring torque feedback for user confirmation of completion, along with a geometry optimized for precise force application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If complex electric pressing tools are used, then pressing force and control are improved, but acquisition costs and maintenance complexity increase
Solution Approach 1:
The patent replaces complex electric pressing tools with a purely mechanical pressing tool that uses a ratchet mechanism and lever system. The mechanical advantage is achieved through the lever arms and ratchet engagement, eliminating the need for electric motors, control systems, and power sources while maintaining sufficient pressing force for pipe fitting applications.
Solution Approach 2:
The pressing tool is designed as a simple, inexpensive mechanical device that can be easily manufactured and replaced if needed. The design prioritizes low cost and simplicity over durability, using basic mechanical components like levers, ratchets, and springs that are cheap to produce and replace.
2Manufacturing precision
If pressing tools require returning to starting position, then complete pressing stroke is achieved, but operation time and complexity increase
Solution Approach 1:
The ratchet mechanism enables continuous unidirectional pressing action without requiring the tool to return to its starting position. Each activation of the lever advances the pressing jaws forward through the ratchet engagement, allowing the operator to maintain continuous productive motion while the mechanism handles the return stroke automatically through the ratchet's one-way locking feature.
3Device complexity
If manual pressing operation is used, then tool simplicity is improved, but pressing force and consistency deteriorate
Solution Approach 1:
The pressing tool uses a dynamic lever mechanism with movable pressing jaws that can pivot and adjust during operation. The lever arms provide mechanical advantage that amplifies the operator's manual input force, while the movable components allow the system to adapt to variations in fitting geometry and resistance, maintaining consistent pressing force throughout the deformation process.
Solution Approach 2:
The pressing jaws are designed with curved pressing surfaces that match the cylindrical geometry of pipe fittings. This curvature ensures uniform distribution of pressing force around the fitting, preventing localized stress concentrations and ensuring consistent deformation. The arc-shaped movement path of the pressing jaws also naturally accommodates the radial deformation required for proper fitting installation.
4Reliability
If excessive pressing force is applied, then connection tightness is improved, but fitting damage occurs
Solution Approach 1:
The pressing tool incorporates visual and tactile feedback mechanisms that allow the operator to monitor the pressing process in real-time. The ratchet mechanism produces audible clicks and tactile resistance changes that indicate the progression of deformation, while the mechanical leverage system naturally limits the maximum force that can be applied, preventing excessive pressing that would damage the fitting.
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
Facilitates efficient, cost-effective, and maintenance-free pressing of pipe connections with clear visual and tactile feedback on completion, ensuring proper force application and preventing damage from excessive pressure.
Implementation Method 1
The holder (18) is spring-loaded by means of a spring element (18c) arranged in the holder (18) in such a way that the pressing jaws (6, 8) are automatically opened after a pressing stroke
Implementation Method 2
Two opposing pressing jaws (6, 8), each of which has a pressing section (10, 12) and a lever section (14, 16)
Data Source
Figure 1a
Figure 1b~1c
Figure 1d
AI summary
The invention relates to a pressing tool for pressing fittings (4) for producing pipe connections, having two opposing pressing jaws (6, 8), which each have a pressing portion (10, 12) and a lever portion (14, 16), and having a holding element (18) for pivotably connecting the pressing jaws (6, 8), wherein the pressing portions (10, 12) form a receiving region (24) and the receiving region (24) is closed by the forcing apart of the lever portions (14, 16). The technical problem of pressing fittings for producing pipe connections in a simple and cost-effective manner is solved in that a drive spindle (26), a spindle nut (28) and at least two drive levers (30, 32) are provided, in that each drive lever (30, 32) is pivotably connected at one end to the lever portion (14, 16) of a pressing jaw (6, 8), and in that each drive lever (30, 32) is connected pivotably to the spindle nut (28) at another end. The invention also relates to a method for pressing fittings for producing pipe connections.