초록 ▼

A rotary wing aircraft has an engine, an engine-driven shaft and a main rotor. A rotor drive shaft is mounted to the main rotor and extends substantially 90 degrees to the engine-driven shaft. A drive pulley is mounted to the engine-driven shaft. A driven pulley is operatively coupled to the rotor d

A rotary wing aircraft has an engine, an engine-driven shaft and a main rotor. A rotor drive shaft is mounted to the main rotor and extends substantially 90 degrees to the engine-driven shaft. A drive pulley is mounted to the engine-driven shaft. A driven pulley is operatively coupled to the rotor drive shaft. A drive belt extends around the drive and driven pulleys. A fluid cylinder has one end stationarily mounted to the engine and another end operatively coupled to the driven pulley to selectively move the driven pulley away from the drive pulley. This movement applies tension in the belt to cause the drive pulley to rotate the main rotor.

대표청구항 ▼

[ I claim:] [1.] In a rotary wing aircraft having an engine, an improved apparatus for connecting an engine-driven shaft to a main rotor, comprising:a rotor drive shaft which is attached to the main rotor;a drive pulley attached to the engine-driven shaft and having a circumferential groove;a driven

[ I claim:] [1.] In a rotary wing aircraft having an engine, an improved apparatus for connecting an engine-driven shaft to a main rotor, comprising:a rotor drive shaft which is attached to the main rotor;a drive pulley attached to the engine-driven shaft and having a circumferential groove;a driven pulley attached to the rotor drive shaft and having a circumferential groove;a drive belt passing around and engaging the grooves of the drive pulley and the driven pulley;a fluid cylinder having one end stationarily mounted to a selected part of the aircraft and another end positioned to selectively apply tension to the belt when supplied with fluid pressure to cause the drive pulley to rotate the driven pulley, the fluid cylinder creating slack in the belt when the cylinder is not under pressure to cease causing the drive pulley to drive the driven pulley;a drive pulley belt retainer extending partially around the drive pulley for holding the belt centered and near but not touching the groove of the drive pulley when the belt is slack; andan arcuate driven pulley belt retainer extending partially around the driven pulley for holding the belt centered and near but not touching the groove of the driven pulley when the belt is slack.