HYDRAULIC DRIVE OF SELF-PROPELLED VEHICLE Russian patent published in 2006 - IPC B60K17/10 

FIELD: mechanical engineering.

SUBSTANCE: invention can be used in drives of small-size farm tractors and road-building machines. Proposed hydraulic drive contains variable-capacity pump connected with engine, vehicle wheel drive hydraulic motor, working equipment drive hydraulic motor, hydraulic motor shaft speed governor, pressure differential valve and logic OR gate. Variable-capacity pump is connected with wheel drive hydraulic motor through pressure differential valve whose spring space is connected with speed governor, and opposite end face space, with pressure hydraulic line of pump through OR gate. Working equipment drive hydraulic motor is connected with variable-capacity pump through speed governor. Distributor with check valves is installed in return hydraulic lines of hydraulic motors.

EFFECT: enlarged operating capabilities of hydraulic drive, provision of stepless control of speeds of equipment and self-propelled vehicle drives, possibility of reversing and braking of hydraulic motors of vehicle drive and working equipment drive.

3 cl, 2 dwg