The hydraulic drive consists of a combination of a hydraulic pump and a hydraulic motor of identical design in which a Hooke's joint is used. Upon rotation of driving shaft A, swash plate 2 reciprocates pistons 3 which draw in fluid and deliver it into chamber a of fixed distribution member 1, from where it is admitted into the cylinders of the hydraulic motor. The fluid reciprocates pistons 3' which are linked to swash plate 2', fixed at the angle β to driven shaft B. Swash plate 2 can be tilted to various angles α to the driving shaft with cup member 4 in which it rotates. This tilting motion is accomplished by handwheel and screw device 5. The cylinders of pistons 3 and 3' are in cylinder blocks 6 and 6', keyed to the driving and driven shafts. When α=β, the speeds of the driving and driven shafts are equal. If cup member 4 is inclined in the other direction, the rotation of driven shaft B is reversed.
$4215$CHP,Dr$