Self-locking Climbing Device with Curved Cam and Pulleys
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Solution Overview
Problem
Existing rope climbing devices for mountaineers and speleologists suffer from rope wear due to corners and edges, leading to thinning and potential tearing, especially in dirty environments, and pose risks during abnormal rope tension or angulations.
Innovation Solution
A self-locking device with a main body featuring a sliding seat, a tilting cam member, and pulleys that minimize friction and prevent rope contact with sharp edges, ensuring secure rope holding and sliding while reducing wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device uses corners and edges to contact and hold the rope, then the locking function is achieved, but the rope wear increases and structural integrity deteriorates
Solution Approach 1:
The patent replaces sharp corners and edges with curved surfaces and rounded contact points. The body features curved engagement surfaces that contact the rope, eliminating the sharp geometric features that cause stress concentration and rope damage while maintaining effective locking capability.
Solution Approach 2:
The patent introduces an intermediary contact mechanism where the rope engages with curved surfaces and cam mechanisms rather than directly with sharp edges. This intermediary contact system distributes the holding force across broader, smoother surfaces, preventing direct stress concentration on the rope.
2Ease of manufacture
If the device structure is simplified, then manufacturing ease improves, but the ability to prevent rope escape during abnormal tension decreases
Solution Approach 1:
The patent divides the locking mechanism into distinct functional segments: a body with curved engagement surfaces, a separate cam mechanism for locking, and a release mechanism. This segmentation allows each component to be optimized for its specific function while maintaining overall structural simplicity and manufacturability.
Solution Approach 2:
The patent employs a dynamic cam mechanism that automatically adjusts its engagement with the rope based on load conditions. During normal operation, the cam maintains secure engagement, but during abnormal tension or escape attempts, the dynamic response of the cam mechanism ensures continued rope retention without requiring complex additional structures.
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 device effectively prevents rope wear and escape, enhancing safety by maintaining rope integrity and stability during climbing, suitable for various high-altitude activities beyond mountaineering and speleology.
Implementation Method 1
pulleys that minimize friction and prevent rope contact with sharp edges
Implementation Method 2
a cam member associated with the body and able to tilt around an axis X from an open position to a position holding the rope
Data Source
AI summary
A self-locking device for a mountaineer or a speleologist climbing up a rope is provided herein. The device includes a main body having an inner face with a sliding seat for the rope. The sliding seat is partially defined by a part of the body of the device folded upon itself and partially defined at a bottom and laterally by the inner face of the body of the device. The device includes a cam member associated with the body and able to tilt around an axis X from an open position to a position holding the rope. The self-locking device also includes one or more pulleys associated with the body. The one or more pulleys are arranged so that a longitudinal axis Z lies on a plane parallel to a plane a of major extension of the body and perpendicular to a sliding direction of the rope.