Hammer Wrench Safety Device Spring Lock
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Solution Overview
Problem
The use of hammer wrenches with hammers to tighten large threaded fasteners is inefficient and unsafe, as it requires a person to hold tension on a rope, which can lead to disengagement and potential injury, especially when working with fasteners in difficult-to-reach positions.
Innovation Solution
A safety device that includes an external thread engagement means, a pressuring means, and a locking mechanism to securely attach the hammer wrench to the fastener, eliminating the need for a person to hold tension on a rope, using a sleeve with a spring and washer to maintain engagement and prevent disengagement during hammer strikes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a person holds tension on a rope tied around the handle of the hammer wrench, then the wrench can be held onto the fastener, but this creates safety hazards and requires continuous human intervention
Solution Approach 1:
The safety device enables the wrench to maintain its own engagement with the fastener through self-biasing mechanisms. The spring-loaded jaw assembly automatically applies and maintains clamping force on the wrench handle without requiring external human intervention, allowing the system to serve itself in maintaining secure engagement.
Solution Approach 2:
The safety device acts as an intermediary between the wrench and the operator, absorbing the forces and stresses that would otherwise require direct human intervention. The device includes intermediate components such as the jaw assembly, spring mechanism, and cable tensioning system that mediate the engagement forces.
2Productivity
If one person holds tension on the rope while another strikes the wrench with a hammer, then tightening can be performed, but this reduces efficiency and increases the risk of equipment damage
Solution Approach 1:
The safety device eliminates the need for human operators to manually hold tension on ropes during the tightening process. The self-biasing spring mechanism automatically maintains engagement forces, allowing the wrench to effectively service itself during hammer strikes without requiring continuous human intervention or complex operational procedures.
3Force
If the wrench is struck with a hammer to tighten large fasteners, then sufficient force can be applied, but the wrench may become disengaged and propelled toward personnel
Solution Approach 1:
The safety device applies preliminary counteracting forces through its spring-loaded jaw assembly that is biased to maintain constant engagement pressure on the wrench handle. This preliminary anti-action prevents the wrench from disengaging and propelling toward personnel during hammer strikes by continuously opposing any separation force with equal and opposite engagement force.
Solution Approach 2:
The safety device provides beforehand cushioning through its spring mechanism that absorbs and dampens the impact forces generated during hammer strikes. The spring-loaded assembly acts as a cushioning element that prevents sudden disengagement and reduces the harmful effects of impact forces that could propel the wrench toward personnel.
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 safety device significantly reduces the risk of injury by ensuring the hammer wrench remains attached to the fastener, allowing for safer and more efficient tightening of large threaded fasteners, even in hard-to-reach locations, by providing consistent pressure and locking mechanisms.
Implementation Method 1
a pressuring means, and a locking means. The biasing means may be a spring
Data Source
AI summary
A hammer wrench securing apparatus includes a collar having an elongate portion with a length and a first external perimeter as well as a base portion with a second external perimeter greater than the first external perimeter. A washer has a first internal perimeter extending around the elongate portion distal from the base portion and a spring extends around the elongate portion of the threaded collar between the base portion and the washer. In a method for removing at least one degree of freedom of a wrench, an internally threaded member is applied to an externally threaded member, a tool end of a wrench is applied to the internally threaded member, a threaded sleeve is applied to the externally threaded member adjacent to the internally threaded member and a washer is biased towards the tool end of the wrench.