Handheld Pressing Tool Automatic Stroke Adjustment
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Solution Overview
Problem
Handheld pressing tools require manual adjustment of the stroke length for different press fittings, leading to inefficiencies and potential errors in crimping operations, as they are not easily adaptable to varying diameters without a stop adjustment.
Innovation Solution
The handheld pressing tool incorporates a brake element and a spring-loaded retaining element that automatically adjusts the piston element's stroke length based on the opening of the pressing jaws, eliminating the need for manual stop adjustments and allowing for seamless transition between short and long strokes without user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the piston element is designed for a fixed long stroke to accommodate large diameter press fittings, then large fittings can be crimped properly, but small fittings require excessive idle stroke time
Solution Approach 1:
The patent applies the dynamics principle by making the stroke length adjustable rather than fixed. The piston element can dynamically change its stroke length between long and short positions, allowing the pressing tool to adapt to different press fitting diameters. This resolves the contradiction by enabling the system to have both long stroke capability for large fittings and short stroke efficiency for small fittings, eliminating idle stroke time.
2Adaptability or versatility
If the stroke length is manually adjusted using a stop mechanism, then different crimping strokes can be achieved, but the user must manually adjust the stop for each operation
Solution Approach 1:
The patent applies the self-service principle by enabling automatic stroke length selection based on the pressing element being used. The control device automatically determines whether a long or short stroke is needed and adjusts the piston element accordingly, eliminating the need for manual stop adjustment. This resolves the contradiction by making the system both adaptable to different strokes and easy to operate, as the adjustment happens automatically without user intervention.
3Productivity
If the piston element returns to a fixed starting position, then the tool structure is simple, but it cannot accommodate both long and short stroke requirements
Solution Approach 1:
The patent applies the dynamics principle by implementing a dual starting position system for the piston element. Instead of a single fixed starting position, the piston can be positioned at either a long-stroke starting position or a short-stroke starting position depending on the pressing element being used. This dynamic positioning capability allows the tool to optimize crimping efficiency for different applications while the control device manages the complexity of position selection automatically.
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 solution simplifies the operation of the tool by automatically adjusting the stroke length, reducing crimping time and minimizing the risk of erroneous operations, as the tool can adapt to different press fittings without manual adjustments, enhancing efficiency and usability.
Implementation Method 1
a brake element is provided that acts upon the piston element and/or the actuating element when the piston element is returned
Implementation Method 2
the piston element may be actuated through a hydraulic pump that is driven by an electric motor
Data Source
AI summary
A handheld pressing tool, which is suitable in particular for crimping press fittings and/or cable lugs, has at least two pressing elements which can move in relation to one another. These can be closed by a hydraulically operated piston element. To this end, the piston element is connected to at least one actuation element for moving at least one of the pressing elements. When the piston element is being returned to a short-stroke starting position, a brake element acts on the piston element and/or the actuation element.