US 6,244,160 B1 · Axial piston machine with RMP-dependent pressure acting against the cylinder drum

Abstract

The invention relates to an axial piston machine (1) comprising a housing (50), a drive shaft (3) mounted in a rotational manner in the housing (50) around a drive shaft axis (12), a cylinder drum (2) which is connected to the drive shaft (3) in a non-rotational manner and in which are embodied cylinders (4) for receiving axially movable pistons (6), and a control plate (26) with control openings (24, 25) designed to cyclically connect the cylinders (5) with a high-pressure and a low-pressure line. The invention provides for a pressing device with at least one centrifugal body (30a-30f), which is impinged upon by a centrifugal force (FF) that increases with the number of rotations per minute (n) of the cylinder drum (2). The invention also provides for a force deflection unit (36-39; 40a-40f, 41a-41f) designed to transform the centrifugal force (FF) acting on the centrifugal body (30a-30f) into a force acting against the cylinder drum (2), whereby said force has a component (FA) which is aligned towards the control plate (26) and in an axial position in relation to the drive shaft axis (12).

Claims14

Dependent claims

An axial piston machine (1) including a casing (50) a drive shaft (3) mounted in the casing (50) to rotate about a drive shaft axis (12), a cylinder barrel (2) non-rotatably connected to the drive shaft (3) wherein a plurality of cylinders (5) are formed to accommodate a plurality of axially mobile pistons (6), a control plate (26) with control ports (24, 25) for cyclically connecting the cylinders (5) to a high-pressure and a low-pressure line, and a contact pressure device for preloading the cylinder barrel (2) against the control plate (26), wherein the contact pressure device comprises at least one centrifugal body (30a-30f) which is translated outwardly when subjected to an increasing centrifugal force (FF) as the speed (n) of the cylinder barrel (2) increases, wherein at least one force redirection member (36-39;

40a-40f, 41a-41f) is provided to convert the centrifugal force (FF) acting on the centrifugal body (30a-30f) into a contact pressure force which is applied to the cylinder barrel (2) and the contact pressure force has a component (FA) which is applied to the cylinder barrel (2) in an axial direction to the drive shaft axis (12), and the force redirection member (36-39) is disposed in a cavity (31) between the cylinder barrel (2) and the drive shaft (3).

An axial piston machine (1) having a casing (50), a drive shaft (3) mounted in the casing (50) to rotate about a drive shaft axis (12), a cylinder barrel (2) non-rotatably connected to the drive shaft (3) wherein a plurality of cylinders (5) are formed to accommodate a plurality of axially mobile pistons (6), a control plate (26) with control ports (24, 25) for cyclically connecting the cylinders (5) to a high-pressure and a low-pressure line, a contact pressure device for preloading the cylinder barrel (2) against the control plate (26), wherein the contact pressure device comprises at least one centrifugal body (30a-30f) which is translated outwardly when subjected to an increasing centrifugal force (FF) as the speed (n) of the cylinder barrel (2) increases, wherein at least one force redirection member (36-39;

40a-40f, 41a-41f) is provided to convert the centrifugal force (FF) acting on the centrifugal body (30a-30f) into a contact pressure force which is applied to the cylinder barrel (2) and has a component (FA) which is applied to the control plate (26) in an axial direction to the drive shaft axis (12), and the force redirection member (37, 38, 51, 52) is supported by the casing (50) and the cylinder barrel (2).

Dependencies are inferred from the claim text.

Axial piston machine with RMP-dependent pressure acting against the cylinder drum

Life of this patent

Axial piston machine with RMP-dependent pressure acting against the cylinder drum

Life of this patent

Abstract

Claims14