Internal Drum Brake Module With Replaceable Friction Ring Surfaces
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Solution Overview
Problem
Prior internal drum brake anti-falling devices suffer from short durability and costly, labor-intensive maintenance due to wear and tear of friction surfaces, leading to ineffective deceleration and difficult assembly/disassembly.
Innovation Solution
The design incorporates a main shaft with a rotating drum and a drum brake module featuring a base and passive ring with adjustable ratchet teeth and brake lining, enhancing static and kinetic friction forces while allowing modular assembly and easy maintenance by separating components for replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the friction surface is used to generate deceleration force, then the deceleration performance is improved, but the durability is reduced due to wear and tear
Solution Approach 1:
The brake unit is segmented into modular components (brake shoe, brake lining, ratchet teeth) that can be independently replaced. The brake lining is made as a separate replaceable component from the brake shoe, allowing the friction surface to be renewed without replacing the entire brake unit, thus resolving the contradiction between deceleration performance and durability.
2Stability of the object's composition
If the brake unit is integrated with the main shaft and rotating drum, then the structural stability is improved, but the maintenance complexity increases due to difficult disassembly and reassembly
Solution Approach 1:
The brake unit is designed as a modular component that can be independently removed from the main shaft and rotating drum assembly. The brake shoe is further segmented with replaceable brake lining and ratchet teeth, allowing maintenance without disassembling the entire mechanism, thus maintaining structural stability while reducing maintenance complexity.
Solution Approach 2:
The brake unit incorporates movable components (brake shoe that can pivot, replaceable brake lining) that allow the system to transition between operational and maintenance states easily, enabling quick replacement of wear parts without complex disassembly, thereby resolving the contradiction between structural stability and ease of repair.
3Reliability
If the replacement of main shaft, deceleration member, and rotating drum is required, then the deceleration function is restored, but the maintenance cost and time increase
Solution Approach 1:
The brake unit is segmented into independently replaceable components (brake lining, ratchet teeth, brake shoe), allowing only the worn friction surfaces to be replaced rather than the entire main shaft, deceleration member, and rotating drum assembly. This significantly reduces maintenance time and cost while restoring the deceleration function.
Solution Approach 2:
The replaceable components (brake lining, ratchet teeth) are extracted as separate serviceable parts from the brake unit, allowing their independent replacement without removing the main shaft, deceleration member, or rotating drum, thus reducing maintenance time and cost while maintaining deceleration functionality.
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
This configuration improves deceleration performance, extends device durability, simplifies maintenance, and reduces costs by enabling adjustable friction forces and modular replacement, thus enhancing user safety and convenience.
Implementation Method 1
the friction surface can wear and fail even after the drum has gone for less than two circles... control the first ring surface and the second ring surface to sequentially generate a maximum static friction and kinetic friction force therebetween... decelerating the auto-rotation of the passive ring, thereby buffering the rotating drum and the life belt
Data Source
AI summary
An internal drum brake anti-falling device includes a carrier having an accommodating chamber and main shaft crossingly arranged in the accommodating chamber for supporting a rotating drum to autorotate, wherein the rotating drum has a life belt coiled thereon, a brake unit arranged at an end thereof, and a drum brake module, which comprises a base, mounted in the accommodating chamber, and a passive ring, mounted on the base. An outer diameter of the base defines a first ring surface configured in a concentric circle manner to the main shaft. An inner diameter of the passive ring defines a second ring surface, wherein an externally toothed ratchet teeth is arranged in a concentric circle manner on the second ring surface to allow the second ring surface and the first ring surface to be disposed opposite to and closely fitting to each other so as to allow the first ring surface and the second ring surface to sequentially generate maximum static friction force and kinetic friction force therebetween when the life belt drives the brake unit buckling with the ratchet teeth, so as to buffer the rotating drum and the life belt.