Slotted Brake Pipe Wrench with Seat-Based Tightening Feedback
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Solution Overview
Problem
Brake pipe nuts are difficult to thread by hand, especially when wearing gloves, and depth gauges are used to ensure proper assembly, increasing assembly time.
Innovation Solution
A hand-operated wrench with an elongated body and complementary nut shape, featuring a channel and seat for visual indication of nut tightening completion, and a knurled surface for improved grip, facilitating easy assembly of brake pipes to a modulator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If hand tightening is used for brake pipe nuts, then assembly time is reduced, but the difficulty of threading increases especially when wearing gloves
Solution Approach 1:
The wrench acts as an intermediary tool between the hand and the nut. The elongated body with complementary nut shape on the inner surface provides a mechanical interface that translates hand motion into effective tightening force, overcoming the difficulty of direct hand threading especially when wearing gloves
Solution Approach 2:
The wrench features a knurled surface on the outer surface that provides enhanced friction and grip. This local quality improvement allows for effective hand operation without slipping, addressing the ease of operation challenge while maintaining hand tightening efficiency
2Measurement precision
If depth gauges are used to determine proper assembly, then measurement precision is improved, but assembly time increases
Solution Approach 1:
The wrench is designed with a seat positioned at a specific distance from the first end face that serves as a built-in depth indicator. As the nut is tightened, the first end face moves along the elongated body toward the seat, providing self-service visual indication of proper assembly depth without requiring external depth gauges
Solution Approach 2:
The visual indication mechanism uses the changing position relationship between the first end face and the seat, which can be perceived as a visual change (similar to color change indication). This provides clear feedback on assembly completion without additional measurement tools
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
Enables efficient hand tightening of brake pipe nuts with visual confirmation of assembly completion, reducing assembly time and ease of use even with gloves, followed by secure engagement with a torque wrench.
Implementation Method 1
a portion of the outer surface of the elongated body defines a knurled surface that extends from the second end face towards the first end face
Data Source
AI summary
A wrench includes an elongated body having a first end face and an inner surface defining an elongated channel extending from the first end face to the second end face. The elongated body includes a first body portion having an inner surface with a shape complimentary to that of the nut and a second body portion having an inner diameter smaller than an inner diameter of the first body portion defining a seat therebetween. The elongated body also defines a cut-out extending from an outer surface to the inner surface along an entire length of the elongated body to enable an insertion of the wrench over a pipe and a nut. Moreover, a distance of the seat from the first end face is selected to provide a visual indication of completion of the hand tightening of the nut when the first end face contacts a modulator.