A brake drum gearbox refers to a system where a brake drum is integrated with a gearbox, often used in automotive, industrial, or heavy machinery applications. The brake drum serves a dual purpose: acting as a coupling to connect the motor and gearbox shaft (or gearbox to machine shaft) and as a braking mechanism to stop equipment without shutting off the motor. Below is a concise overview based on available information:
 
Key Points:
Functionality:
The brake drum is part of a coupling system, typically a brake drum gear coupling, which connects the motor to the gearbox or another machine shaft. It allows torque transmission while also providing a braking surface.
The brake, fitted on the drum, applies mechanical force to stop the equipment, making it useful in applications like cranes, hoists, conveyors, and vehicles where precise stopping is needed without disengaging the motor.
 
Design and Components:
Common types include pin-bush or geared couplings, with the brake drum and a flange or sleeve as primary components. Some designs may have additional parts like hubs or extension sleeves.
Standard sizes range from 100mm to 600mm in diameter, with custom sizes available. Couplings are often supplied with a pilot bore unless a finished bore and keyway are specified.
Materials like carbon steel or cast iron are used for durability and corrosion resistance.
 
Applications:
Automotive: Found in vehicles like Land Rovers (e.g., LT230 transfer box) or older models like the Citroën 2CV, where the brake drum is part of the gearbox assembly for parking or static braking.
Industrial: Used in cranes, winches, hoists, and conveyors, often paired with thruster brakes, electromagnetic brakes, or solenoid brakes.
Construction Machinery: Components like the ZF 4WG200 gearbox brake drum are used in heavy equipment from brands like XCMG, Liugong, and Zoomlion.