POSITIVE-DISPLACEMENT HYDRAULIC TRANSMISSION Russian patent published in 2003 - IPC

FIELD: positive-displacement hydraulic transmissions for rotary motion. SUBSTANCE: proposed transmission includes pump and hydraulic motor located in inner bore of housing 1. Pump has shaft 2, rotor 3 with splines 4 where gates 5 are located, disk 6 having central hole for rotor 3 and slots with seals for passage of gates 5. Hydraulic motor has shaft 9, rotor 10 with splines 11 and gates 12, disk 13 with hole for rotor 10 and slots with seals for passage of gates 12. Inner bore 14 between disks 6 and 13 is used both by pump and hydraulic motor. Transversal partition 15 slidably located in bore has working fluid supply passages 16, discharge passages 17 and bypass passages 18. During rotation of rotor 3, gates 5 get in contact with surface of bore 14 forcing liquid out of working chamber and admitting it to hydraulic motor through passages 17, 18 and 16. Liquid rotates rotor 10 and shaft 9 connected with it. Having done work, liquid is discharged to pump by other group of passages. Gear ratio of hydraulic transmission is regulated by axial shift of housing 1. EFFECT: facilitated control of hydraulic transmission. 3 cl, 2 dwg