Hydrostatic axial piston machine

US6736048B2 · kind B2 · utility

Assignee

• LIEBHERR MACHINES BULLE SA · CH

Inventors

• Josef Riedhammer · Horb, DE
• Erich Eckhardt
• Franz-Josef Schwede · Murten, CH

Key dates

• Filing date: Jul 18, 2001
• Grant date: May 18, 2004
• Expiry date: Jul 18, 2021

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04B1/2042
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A hydrostatic axial piston machine has a drum-like cylinder block which is supported in a manner fixed against rotation on a driving or output shaft and is provided concentrically and parallel to its center line with cylinder boreholes in which axially displaccable pistons are arranged which are supported via spherical heads on a slanting disk which is fixed to the housing and preferably adjustable in its slanting angle. The cylinder openings opposite the slanting disk sweep over roughly kidney-shaped low pressure and high pressure control openings of a control body, between which reversing regions with additional boreholes are located. To control the additional boreholes, which influence the pressure increase or the pressure drop on the passing of the cylinder openings over the reversing regions, in dependence on the operating states, a borehole opens at least in a reversing region of the control body which is connected to the high pressure side or the high pressure control opening by a line. A restrictor controlled by the high pressure is arranged in the line which releases a restrictor opening corresponding to the high pressure in the line.