Accession Number : ADD008883

Title :   Load Proportional Antibacklash Two-Step Gear Drive System.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Wutherich,Hermann A

Report Date : 07 Jul 1981

Pagination or Media Count : 10

Abstract : A novel load proportional antibacklash two-step gear drive system utilizes, on the idler shaft to transmit torque from a drive gear to the driven gear, a split opinion with each opinion portion provided with a pressure chamber connected to a torque sensor and servo control unit for controlling the pressure applied individually to each split gear portion, against opposing tooth faces of the drive gear and the driven gear. The servo control unit provides high pressure (hydraulic or pneumatic) to a first split gear portion for transmitting torque from the drive gear in one direction while providing low pressure to the second split gear portion in the opposing rotational sense to maintain contact of the split gear with both faces of the drive gear at all times, thereby eliminating backlash. Upon reversal of the direction of the gear system, the servo unit provides high pressure to the second split gear portion which then acts as the torque transmitting gear, and maintains low pressure to the first split gear portion to maintain it in contact with the drive gear to prevent backlash upon reversal of the direction of drive of the gear system. (Author)

Descriptors :   *Patent applications, *Transmission gears, *Drives, *Backlash, *Countermeasures, Drive shafts, Motors, Servomechanisms, Performance(Engineering), Automotive vehicles, Inventions, Torque, Transmissions(Mechanical), High pressure, Low pressure

Subject Categories : Machinery and Tools

Distribution Statement : APPROVED FOR PUBLIC RELEASE