The hydraulic steering cylinder is a hydraulic power steering. A steering gear (also commonly referred to as a steering gear) is a set of gear mechanisms that completes from rotary motion to linear motion (or approximately linear motion), and is also a deceleration transmission device in the steering system. It is the most important component in the steering system. The hydraulic steering cylinder is a cycloid rotary valve type full hydraulic steering cylinder composed of a follower rotary valve and a cycloid rotary stator pair. It is a full hydraulic steering system composed of fuel supply pump, overflow valve (or diverter valve), steering cylinder and other connecting accessories.
The steering valve is composed of a valve body, a valve sleeve, a valve core, and a steel leaf return spring. There are 4 oil ports on the valve body, P port communicates with the hydraulic pump, O port communicates with the oil tank, A port and B port communicate with the left and right chambers of the steering hydraulic cylinder respectively. A check valve is installed between the oil inlet P and the oil return 0. Seven oil holes are evenly distributed along the circumference of the valve body and lead to the seven working chambers of the cycloid motor.
There are 4 shoulders and 4 ring grooves on the outer surface of the valve sleeve. The six holes in the ring groove communicate with the oil return port on the valve body. There are two rows (6 in each row) of 12 e holes on the ring groove, which are always in communication with the B hole on the valve body. There are two rows (6 in each row) of 12 d holes on the ring groove, which are always in communication with the A hole on the valve body. There are 6 b holes and two rows of dense small holes a on the bottom ring groove, which are always in communication with the oil inlet P on the valve body. The 12 C holes on the shoulders can be divided into singular and double numbers according to the order of arrangement. If there are several holes in the single number holes communicating with the oil inlet cavity of the cycloid motor, there are several holes in the double number holes and the cycloid The oil discharge chamber of the motor is connected.