Self-locking Pulley Friction Release Mechanism
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Solution Overview
Problem
Existing locking pulley systems require manual loosening and can be difficult to release, especially when elevated, and often restrict movement in specific directions due to binding teeth or pinching mechanisms.
Innovation Solution
A self-locking pulley design featuring two interconnected pieces with a spinning connection, allowing the rope or strap to be threaded in opposing directions, which creates a frictional lock that can be released by altering the angle between the pinching plates, enabling free movement and locking in any direction without one-way clutches or pinching mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If binding teeth or pinching mechanisms are used to lock the rope, then the rope is securely held, but the device becomes difficult to release and restricts movement in specific directions
Solution Approach 1:
The locking mechanism transitions from a static binding tooth system to a dynamic friction-based system. The rope passes between two plates that can dynamically adjust their clamping force through friction, allowing the system to lock securely in any position while remaining easily releasable by pulling the rope in any direction.
Solution Approach 2:
The invention removes the binding teeth and traditional pinching mechanisms from the system. Instead of using mechanical interlocking elements, the solution extracts the locking function and achieves it through friction between smooth plates, eliminating the directional constraints and release difficulties associated with teeth-based mechanisms.
2Reliability
If one-way clutches or binding teeth are used, then locking in a specific direction is achieved, but movement freedom in other directions is restricted
Solution Approach 1:
The friction-based locking system provides universal locking capability in all directions. Unlike one-way clutches that only lock in one direction, the two-plate friction mechanism can securely hold the rope regardless of the pulling direction, allowing the user to lift, lower, or reposition the load from any angle while maintaining secure locking.
3Reliability
If manual loosening mechanisms are used, then the rope can be held securely, but the device requires manual intervention for release
Solution Approach 1:
The system provides self-service release functionality. When the user pulls the rope in any direction, the friction between the plates automatically decreases, causing the plates to separate and release the locking action. This eliminates the need for manual loosening mechanisms or additional操作步骤, as the system automatically transitions from locked to unlocked state through the user's natural pulling action.
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 easy release of loads from any direction and accommodates various rope diameters, providing secure locking and lifting capabilities without manual intervention, allowing for flexible use and reduced operational complexity.
Implementation Method 1
threaded through the locking pulley in the desired direction. At some places, the threading passes the rope or strap in opposing directions to cause a binding and prevent free movement of the rope or strap
Implementation Method 2
A self-locking pulley design featuring two interconnected pieces with a spinning connection, allowing the rope or strap to be threaded in opposing directions, which creates a frictional lock that can be released by altering the angle between the pinching plates
Data Source
AI summary
Improvements to a pulley is disclosed. The rope is threaded through the self-locking pulley in the desired direction. At some places, the threading passes the rope or strap in opposing directions to cause a binding and prevent free movement of the rope or strap in one direction. There are no one-way clutches or self-locking teeth to lock movement in a particular direction. A first part it secured to a spinning mount or ceiling so a user can walk around a suspended self-locking pulley and pull the rope or strap from any direction. The second part can pivot and move up-and-down on the first piece. A threaded member alters a frictional lock between the at least two interconnecting pieces. The interaction of the at least two pieces allows for lifting, locking and lowering of a load on the rope or strap.