Double Retaining Ring With Breakable Rivets for Fall Impact Buffering
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Solution Overview
Problem
Existing safety harness retaining rings lack the capability to enhance the buffer effect during falls, as they do not effectively absorb impact forces.
Innovation Solution
A double retaining ring system with a breakable connection structure, incorporating a pivot device and energy-absorbing package, where rivets absorb impact forces and separate the rings to engage the energy-absorbing package, enhancing the buffer effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a single retaining ring is used to connect the self-retracting lifeline and energy-absorbing package, then the structure is simple, but the buffer effect is insufficient
Solution Approach 1:
The retaining ring is divided into a first retaining ring and a second retaining ring connected by a pivot device. The pivot device includes a shaft seat, two receiving seats, and a shaft with rivets that can break under impact force, allowing the rings to separate and engage the energy-absorbing package, thereby enhancing the buffer effect while maintaining structural simplicity
Solution Approach 2:
The pivot device enables dynamic movement between the first and second retaining rings, allowing rotation and separation under impact force. The rivets are designed to break under specific force conditions, transforming the static structure into a dynamic system that adapts to impact forces by separating the rings to engage the energy-absorbing package
2Strength
If the retaining ring structure is made more complex to enhance buffering, then the buffer effect improves, but the ease of operation deteriorates
Solution Approach 1:
The retaining ring is segmented into two separate rings connected by a pivot device with breakable rivets. This segmentation allows the system to maintain simplicity in normal operation while providing enhanced buffering capability when needed, as the rings can separate under impact force to engage the energy-absorbing package
Solution Approach 2:
The rivets in the pivot device are designed as disposable, breakable connection elements. Under normal operation, they provide secure connection with minimal complexity. Under impact force, they break to allow ring separation and energy-absorbing package engagement, sacrificing the rivets to protect the worker, thereby maintaining ease of operation while enhancing buffer capacity
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 double retaining ring system effectively absorbs impact forces by separating to engage the energy-absorbing package, thereby significantly improving the buffer capacity of safety harnesses.
Implementation Method 1
a connection structure between the double retaining ring has a breakable weakness, so that the ring body could absorb an impact force
Implementation Method 2
two rivets respectively pass through the two rivet holes, wherein two ends of each of the two rivets are engaged with the two fixing arms of each of the two receiving seats
Data Source
AI summary
A double retaining ring is provided. Either a first retaining ring or a second retaining ring is connected to a shaft seat and the other of the first retaining ring and the second retaining ring is connected to two receiving seats. The shaft seat has an axial hole. Each receiving seat has two fixing arms. An accommodating groove having an opening is formed between the fixing arms. The shaft passes through the axial hole and is inserted into the two accommodating grooves. Two rivet holes are provided on two sides of the shaft. Two rivets respectively pass through the rivet holes and the shaft is fixed to the fixing arms through the two rivets. The two rivets are breakable and the shaft is detachable from the accommodating grooves.