Multiplying nested gearbox

US10634218B2 · kind B2 · utility

Inventors

• David R. Hall · Provo, US
• Daniel Madsen · Bunker, US
• Benjamin Taylor · Provo, US
• Nathan Davis · Austin, US

Key dates

• Filing date: Nov 1, 2017
• Grant date: Apr 28, 2020
• Expiry date: Sep 15, 2038

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B66D1/485
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A transmission apparatus is disclosed. The transmission apparatus includes at least a first gearset and a last gearset. Each gearset includes a sun gear, a set of planetary gears, and a ring gear. The ring gears have splined outer surfaces. Each gearset has a rotational speed and a torque. A drum encloses and mates with the gearsets. The drum has splined inner surfaces that mate with the splined outer surfaces. The last splined outer surface transfers the last torque of the last gearset directly to the drum. The drum transfers at least a portion of the last torque to the first splined outer surface of the first gearset. This reduces the first rotational speed of the first gearset and increases the first torque of the first gearset, thereby reducing the last rotational speed of the last gearset and increasing the last torque of the last gearset.