wheelandgear

Wheelandgear is a term in mechanical engineering describing an integrated drive element that combines wheel components with a gear mechanism to transmit torque. The concept covers assemblies where a wheel and a gear operate as a single unit, enabling compact transmission paths in constrained spaces.

Designs typically include a wheel hub, wheel body, and an internal or external gear element. Bearings and seals support rotation, while a shaft mounts the assembly. In some designs, gear teeth are formed directly on the wheel; in others, a removable gear ring is mounted to the hub. This integration can reduce part count and simplify alignment between rotating and driven elements.

Applications are common in compact drivetrains, robotics, conveyors, and certain automotive or industrial equipment where space or weight is critical. The integrated form can provide direct torque transfer, fewer joints, and potential cost savings, though at the expense of lubrication and heat management considerations.

Materials used include steel, aluminum alloys, or composites, with manufacturing methods such as forging, casting, CNC machining, heat treatment, and surface finishing. Additive manufacturing is also employed for complex geometries. Quality control focuses on gear tooth accuracy, bearing fit, and dimensional tolerances to ensure reliable operation under load.

The term is not standardized; wheelandgear designs vary by manufacturer. It overlaps with wheel hubs, planetary gear systems, and integrated drivetrains in modern machinery, reflecting a broader trend toward compact, modular transmission components.