HYDROSTATIC TRANSMISSION GEAR RATIO REGULATOR (VERSIONS) Russian patent published in 1999 - IPC

FIELD: mechanical engineering; transmissions. SUBSTANCE: stepless hydrostatic gearbox can be used in hydrostatic transmissions. It has input shaft connected with hydraulic pump, hydraulic motor, wedge-type rocking disk installed between hydraulic pump and hydraulic motor, and output shaft. Wedge-type rocking disk is hinge mounted on output shaft to take up torque created at pumping of working liquid under pressure between pump and motor through corresponding ports in rocking disk. Gearbox has gear ratio regulator with hydraulic drive made for changing axial position of spherical supports on which cylinder blocks of hydraulic pump and hydraulic motor are installed. Changing of position of supports makes it possible to regulate angle of disk tilting relative to output shaft axis and thus change gearbox gear ratio. EFFECT: reduced overall dimensions of gearbox, number of gearbox parts and cost of manufacture. 20 cl, 10 dwg