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EXPLODED ASSEMBLY ENGINE5 calibrated motion paths
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Most bicycles change gears by moving the chain across different sprockets. An internally geared bicycle hub takes a different approach: several combinations of gears live inside the rear wheel hub itself. From the outside, the mechanism may look like a compact metal cylinder, but its interior includes precision gear wheels, bearings, pawls, clutch elements and a carefully indexed shift control. Understanding that arrangement from a flat illustration is challenging. TORQUEHUB H14 is an interactive exploded-view laboratory that lets you look at the mechanism from any angle, separate each component, study its role, and build the assembly back together.
The simulation contains 137 independently selectable mechanical components, arranged into seven educational subsystems. Its mechanism is a fictional, stylised 14-ratio compound planetary hub designed specifically for exploring engineering principles. It is not a dimensional replica of any commercial transmission; the ratios, dimensions, masses, engagement logic and materials are illustrative. The tooth-count relationships are grounded in elementary planetary gear geometry, while the simplified gear profiles and visible component motion make the underlying principles easier to observe. No specification should be used to fabricate a riding component.
A simple planetary stage has a central sun gear, several smaller planet gears, a surrounding internally toothed ring gear, and a carrier supporting the planet pins. All four elements share a central axis, though the planets are positioned around it. A gear stage can transmit speed, change torque, or reverse relative motion when one of its members is held or driven. The particular behaviour depends on which element receives input, which element outputs motion, and which element reacts against the stationary frame.
This is an educational, illustrative model of a fictional product: part names, masses, materials and operating figures are simplified and are not a manufacturer's drawing, a design basis or a safety/acceptance document.