Adjustable Pipe Wrench Segmented Handle Design
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Solution Overview
Problem
Conventional pipe wrenches face issues with increased weight and potential premature failure when modifications are made to extend the handle, such as crimping a conduit onto the handle, which affects their longevity and functionality.
Innovation Solution
A pipe wrench design featuring a body with a head and handle portion, including a first jaw with teeth, a second jaw with a threaded portion and teeth, an actuator to adjust the jaws, and an extension handle with a locking mechanism that allows for adjustable length without adding weight, using a sliding and locking mechanism to secure the extension handle in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a piece of conduit is crimped onto the handle to increase handle length, then the overall weight of the pipe wrench increases, but this modification may affect the life of the tool or lead to premature failure
Solution Approach 1:
The handle is divided into a main handle portion and a separate extension handle. The extension handle can be selectively attached or removed, allowing the user to extend the handle length only when needed. This segmentation prevents the permanent weight increase and reliability issues associated with crimping conduit, as the extension is a distinct, removable component that does not compromise the integrity of the original handle.
Solution Approach 2:
The handle length is made dynamic and adjustable rather than fixed. The extension handle can be inserted into and locked onto the main handle portion when additional length is required, and removed when not needed. This dynamic configuration allows the wrench to adapt to different working conditions without permanently modifying the original handle, thereby maintaining tool life and reliability.
2Length of moving object
If conventional modifications are made to extend the handle, then the handle length increases, but the weight of the wrench increases and longevity is affected
Solution Approach 1:
The handle system is segmented into a main handle portion and a separate extension handle. This allows the extension to be added only when needed, rather than permanently increasing the weight of the entire wrench. The extension handle is a lightweight component that can be detached, ensuring the base wrench maintains its original weight and balance characteristics.
Solution Approach 2:
The extension handle is designed with specific local properties - it is lightweight and optimized for extending reach rather than providing structural support. The locking mechanism uses a collar and wedge system that engages locally at the junction between the extension and main handle, minimizing the impact on overall wrench weight while providing sufficient securing force.
3Adaptability or versatility
If the extension handle is made movable relative to the handle portion, then adjustability is improved, but the complexity of the locking mechanism increases
Solution Approach 1:
The locking mechanism is segmented into distinct functional components: a collar that receives the extension handle, and a wedge that provides the locking action. This segmentation allows each component to perform its specific function simply - the collar provides guidance and positioning, while the wedge provides mechanical locking through friction and geometric constraint, reducing overall complexity.
Solution Approach 2:
The collar acts as an intermediary component between the extension handle and the main handle portion. It provides a interface that simplifies the locking action by concentrating the securing function in one location. The wedge, as another intermediary, translates the insertion motion into a secure locked position through simple geometric engagement, avoiding the need for complex fastening mechanisms.
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 solution provides a lightweight, ergonomic, and effective torque transmission capability, improving the wrench's longevity and usability compared to conventional designs with conduit modifications, while maintaining a balanced weight distribution.
Implementation Method 1
The locking mechanism also includes a wedge engageable with the handle portion and the extension handle when the collar is in the locked position
Implementation Method 2
a second jaw extending through the aperture of the head with the second jaw including a threaded portion and second teeth, an actuator coupled to the threaded portion of the second jaw such that rotation of the actuator relative to the second jaw moves the second teeth of the second jaw relative to the first teeth of the first jaw
Data Source
AI summary
A wrench includes a body having a head and a handle portion defining a longitudinal axis. The wrench includes a first jaw coupled to the head with the first jaw including first teeth and an edge. The edge defines a width of the first jaw. The wrench includes a second jaw extending through an aperture of the head with the second jaw including a threaded portion and second teeth. The wrench includes an actuator coupled to the threaded portion of the second jaw such that rotation of the actuator relative to the second jaw moves the second teeth relative to the first teeth. A length is measured from the edge of the first jaw to the second end of the handle portion parallel to the longitudinal axis. A ratio of the width of the first jaw over the length is less than 0.06.