Pipe Plier Jaw Geometry for Multi-Shape Grip
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Solution Overview
Problem
Conventional pipe pliers struggle with evenly distributing pipes of different sizes around the locking teeth, leading to slippage and detachment issues, especially when handling smaller pipes, and are ineffective in gripping hexagonal screw members.
Innovation Solution
A pipe plier structure featuring a first body with serrated teeth and a second body with pivotally connected serrated teeth, along with a locking member providing elastic restoring force, allowing for even distribution of pipes and enhanced versatility in gripping various screw members by adjusting the angle and position of the teeth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the first engaging teeth are arranged at an angle of 93° to 97° and the second engaging teeth at 93° to 97°, then the pipe plier can grip circular pipes, but it cannot effectively grip hexagonal screw members which have 120° angles between faces
Solution Approach 1:
The patent designs the movable jaw with two distinct sets of engaging teeth (first and second engaging teeth) with different angular configurations. The first engaging teeth are arranged at 93°-97° for gripping circular pipes, while the second engaging teeth are arranged at 110°-130° for gripping hexagonal screw members. This multi-functional tooth configuration allows a single pipe plier to effectively grip both circular and hexagonal objects without requiring separate tools.
2Ease of operation
If the locking teeth are positioned with a fixed angle of 90° to 92°, then the structure is simple, but pipes of different sizes cannot be evenly distributed around the locking teeth causing slippage and detachment
Solution Approach 1:
The patent introduces a curvature radius R1 for the locking teeth that is specifically designed to be 0.05 to 0.15 times the outer diameter of the pipe. This local geometric modification allows the locking teeth to adapt to pipes of different diameters, enabling even distribution of pipes around the locking teeth and preventing slippage, while maintaining overall structural simplicity.
3Reliability
If the first engaging teeth are arranged horizontally for minimum size pipes, then small pipes can be gripped, but pipes of different sizes are not evenly distributed causing instability
Solution Approach 1:
The patent modifies the angular parameter of the first engaging teeth from the conventional 90° to a range of 93° to 97°. This parameter change optimizes the tooth arrangement to achieve even distribution of pipes of different sizes around the locking teeth, improving grip reliability across various pipe diameters while maintaining the horizontal orientation for minimum size pipes.
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 improved pipe plier structure ensures even distribution of pipes of different sizes, reduces slippage and detachment, and effectively clamps hexagonal and star-shaped screw members, enhancing its versatility and operational efficiency.
Implementation Method 1
The locking member provides an elastically restoring force to the first body and the second body after the second body is extended outward relative to the first body
Data Source
AI summary
A pipe plier structure includes a first body, a second body, a pivot member, and a locking member. The first body is provided with multiple first teeth, an arc line, an axis, a first vertical line, a radius, a first angle, and a second angle. The second body is provided with multiple second teeth, multiple third teeth, a second vertical line, a first connecting line, a second connecting line, a third angle, a fourth angle, a concave face, a fifth angle, a sixth angle, a seventh angle, and an eighth angle. The pivot member is assembled with the first body and the second body. The locking member is assembled with the first body and the second body. The locking member provides an elastically restoring force to the first body and the second body after the second body is extended outward relative to the first body.