Fluid pressure pump and fluid pressure system
AssigneeNabtesco Corporation
InventorsMasahiko MARUOKA, Atsushi FUKUI
Life of this patent
Estimating the term…
Abstract
A fluid pressure pump and a fluid pressure system in which leakage of fluid and ablation of a cylinder block and a port plate can be prevented by pressing the cylinder block to the port plate with an appropriate pressing force. A hydraulic pump includes a cylinder block that has a cylinder chamber that may be in communication with an oil passage of a port plate and in which a piston is housed; and a cylinder block pressing means imparting, to the cylinder block, a pressing force that presses the cylinder block to the port plate. The cylinder block pressing mechanism has a changing means that changes the force that presses the cylinder block to the port plate.
Claims16
A fluid pressure pump, comprising:
- a port plate in which a fluid passage is formed;
- a cylinder block including a cylinder chamber in which a piston is housed, wherein the cylinder chamber may be in communication with the fluid passage in the port plate;
- and
- a pressing means applying to the cylinder block, a pressing force that presses the cylinder block to the port plate,
- wherein the pressing means includes a changing means that changes the pressing force.
A fluid pressure pump, comprising:
- a cylinder block including a central axis and a cylinder chamber in which a piston is housed;
- a port plate coaxially coupled to the cylinder block, the port plate including a fluid passage communicated with cylinder chamber;
- a first biasing member configured to bias the cylinder block to the port plate in a first axial direction;
- and
- a biasing force adjuster configured to dynamically control biasing force of the first biasing member.
Dependencies are inferred from the claim text.