POSITIVE-DISPLACEMENT HYDRAULIC TRANSMISSION Russian patent published in 1994 - IPC

FIELD: mechanical engineering. SUBSTANCE: pump and hydraulic motor with variable working volumes are integrated in a monoblock engageable with a casing. Working members are connected to coaxially mounted input and output shafts respectively. High and low-pressure channels form a closed circuit. A control member is kinematically connected to the monoblock. The pump and the hydraulic motor are gear multisectional structures with equal in width gears in the section. The total number of sections is no less than three, the sections are coaxially positioned in one plane to form high- and low-pressure lines in it on the sides of the gear mesh. The gears are movably connected to the input and output shafts by splines and their joints are equivalent to each other. A coaxial cylindrical belt which is equal in diameter to the inner cylindrical centering surface of the splines is made in the space between the spline rims of the shafts. The belt is made on the surface of one of the shafts and its width is no less than the axial length of the gear spline. The shafts are axially connected to each other and the casing. The monoblock is mounted in the casing for movement along the shafts. EFFECT: improved structure. 6 cl, 3 dwg