Stripping Pliers Damping Mechanism for Lever Control
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Solution Overview
Problem
Existing stripping pliers require significant force during the cutting and break-away strokes but experience a sudden decrease in required force during the stripping stroke, leading to uncontrolled closure of hand levers and potential user injury, especially when stripping cables with multiple strands.
Innovation Solution
Incorporating a spring element or damping element that becomes effective during the transition from the break-away stroke to the stripping stroke, providing additional force to counteract the decrease in sliding friction and maintain control, thereby reducing the risk of sudden lever closure and improving operational safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring element or damping element is incorporated to provide additional force during the stripping stroke, then operational safety and user control are improved, but device complexity increases
Solution Approach 1:
The spring element or damping element is integrated into the existing hand lever mechanism by nesting it within the lever structure. This allows the additional force-providing component to be housed within the existing device boundaries without significantly increasing external complexity, while still providing the necessary safety function during the stripping stroke
Solution Approach 2:
The spring element or damping element acts as an intermediary component between the user's manual force and the cutting mechanism. It provides additional force during the stripping stroke to prevent uncontrolled closure, mediating the force transmission in a way that enhances safety without requiring complete redesign of the force application system
2Force
If the hand levers are designed to provide sufficient actuating force for cutting and break-away strokes, then cutting performance is improved, but uncontrolled closure during stripping stroke becomes more likely
Solution Approach 1:
The hand lever system is made dynamic by incorporating a spring element or damping element that changes its force characteristics during different strokes. During the stripping stroke, the spring/damper provides additional opposing force to prevent uncontrolled closure, while during cutting and break-away strokes, the system maintains sufficient actuating force. This dynamic adjustment allows the same mechanism to provide both high force and controlled operation
Solution Approach 2:
The force parameters of the hand lever system are changed during different operational phases. The spring element or damping element modifies the force-displacement characteristics of the system, providing different force levels during cutting, break-away, and stripping strokes. This parameter change ensures sufficient force for cutting while preventing uncontrolled closure during stripping
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 spring or damping element helps maintain consistent force conditions, reducing the likelihood of uncontrolled movements and enhancing user control during the stripping process, thereby improving handling and safety of the stripping pliers.
Implementation Method 1
a spring element or damping element that becomes effective during the transition from the break-away stroke to the stripping stroke
Implementation Method 2
a spring element or damping element that becomes effective during the transition from the break-away stroke to the stripping stroke
Data Source
AI summary
The invention relates to stripping pliers (1). During a cutting stroke of the stripping pliers (1), cutting blades (14a, 14b) radially cut into an insulation of a cable (13). In a subsequent break-away stroke, the partially cut sub-region (33) of the insulation of the cable (13) is broken away. Finally, in a stripping stroke the broken away sub-region (33) is pulled along the longitudinal axis (19) of the cable (13) from the electrical wire (39).In order to avoid that in the stripping stroke, wherein the forces between the cable and the cutting blades (14a, 14b) suddenly drop, the hand levers (2, 3) perform an uncontrolled fast closing movement according to the invention at the transition from the break-away stroke to the stripping stroke a spring element and/or damping element (37) becomes effective which preferably comes into contact with a roller (36) of a lever (22).