REXROTH plunger pump: The inclined shaft type inclined disc axis is consistent with the drive shaft axis. The reason is that when the plunger tilts at an angle relative to the transmission shaft, it undergoes reciprocating motion. Flow adjustment relies on the angle of the piston cylinder's swinging motion to achieve, so it is also known as a swing cylinder in some places. Compared to the inclined plate type, it works reliably and has a large flow rate, but its structure is complex. Compared with radial piston pumps, axial piston pumps have a larger displacement, generally operating within the range of 20~50MPa, higher efficiency, smaller radial size, compact structure, smaller volume, and lighter weight. The structure of plunger pumps is relatively complex, with high manufacturing requirements and relatively expensive prices. To improve work efficiency, axial piston pumps generally use main components such as cylinder body, oil distribution plate, plunger, and inclined plate. There are multiple pistons inside the cylinder, which are arranged axially, meaning that the centerline of the pistons is parallel to the axis of the drive shaft, hence it is called an axial piston pump. But what sets it apart from reciprocating piston pumps is that its plunger not only moves back and forth, but also rotates relatively between the plunger, pump cylinder, and inclined plate. The contact surface between the piston and the inclined disc is spherical. There are high and low pressure moon shaped grooves on the oil distribution plate, which are separated by partitions to ensure a certain degree of sealing, and are connected to the pump oil inlet and outlet respectively. There is an inclination angle between the axis of the tilted cylinder and the axis of the cylinder.