초록 ▼

A highly efficient ultra-light weight heavy lift helicopter transmission is disclosed herein which, by these very characteristics, allows greater helicopter payloads and gross weights than now can be attained using present state of the art design approaches. These characteristics are made possible t

A highly efficient ultra-light weight heavy lift helicopter transmission is disclosed herein which, by these very characteristics, allows greater helicopter payloads and gross weights than now can be attained using present state of the art design approaches. These characteristics are made possible through the use of: 1. Multiple vertically mounted engines which allow short power paths and a minimum number of gear meshes in series. 2. Many load sharing power paths (three per engine) having fixed load sharing ratios which are unaffected by transmission deflections and manufacturing tolerances. 3. A large overall gear reduction through the use of differential planetary meshes (one per engine) and a large gear reduction with many input load paths at its final output herringbone type gear stage. 4. A unique final stage, bearingless, floating bull gear support system having an ultra lightweight reaction load path means, and 5. An isolation mounting means for the transmission whereby the structural demand of the transmission is only torsional.

대표청구항 ▼

An ultra lightweight mechanical shaft-horsepower type power transmission for use in supporting and driving heavy lift helicopters comprising: a rotatable power output ring gear; bearingless mounting means solely supporting said rotatable power output ring gear at the pitch diameter of its teeth; pro

An ultra lightweight mechanical shaft-horsepower type power transmission for use in supporting and driving heavy lift helicopters comprising: a rotatable power output ring gear; bearingless mounting means solely supporting said rotatable power output ring gear at the pitch diameter of its teeth; propulsion means parallel and radially disposed with the rotatable axis of said ring gear and operably coupled in load bearing and driving relationship to said rotatable power output ring gear via said mounting means; and said mounting means providing multiple power inputs to said rotatable power output ring gear in order to provide multiple torque load paths thereto.