Hydrostatic axial piston machine

Patent metadata

Field	Value
Publication number	US-9644617-B2
Application number	US-201314387955-A
Country	US
Kind code	B2
Filing date	Mar 21, 2013
Priority date	Mar 29, 2012
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

The disclosure relates to a hydrostatic axial piston machine having a housing, having a drive shaft, to which a flange disc is fastened in a rotationally fixed manner, and having a swash plate, to which a rotor disc, driven by the drive shaft or the flange disc, is rotatably mounted, and having a plurality of displacement units arranged distributed between the flange disc and the rotor disc and around the axis of the drive shaft, each displacement unit comprising a cylinder sleeve and a piston which extends into the cylinder sleeve and has a ball head and a spherical joint head which extends into the cylinder sleeve, wherein during operation, the piston plunges more or less far into the cylinder sleeve.

First claim

The invention claimed is:

1. A hydrostatic axial piston machine comprising:
a housing;
a drive shaft;
a flange disk arranged on the drive shaft and configured for conjoint rotation with the drive shaft;
a rotatable rotor disk arranged so that an axis of rotation of the rotatable rotor disk is at an oblique angle with respect to an axis of the drive shaft and so that the rotatable rotor disk is configured to be taken along by one of the drive shaft and the flange disk; and
a plurality of displacer units arranged in a manner distributed between the flange disk and the rotor disk and around the axis of the drive shaft, each displacer unit comprising:
a cylinder sleeve, and
a piston, having a ball head, and a spherical joint head projecting into the cylinder sleeve,

wherein the piston of each displacer unit performs a stroke relative to a respective cylinder sleeve during operation, and
wherein the joint head of each displacer unit is situated on the flange disk and the piston of each displacer unit is situated on the rotor disk.

2. The hydrostatic axial piston machine according to claim 1 , wherein:
the drive shaft is mounted in a first rotary bearing on a first side of the flange disk and a second rotary bearing on a second side of the flange disk, and
the rotor disk is arranged between the flange disk and one of the first and second rotary bearings and has a central passage for the drive shaft.

3. The hydrostatic axial piston machine according to claim 1 , wherein the rotor disk has a flat sliding surface opposite a sliding partner fixed in a direction of rotation of the drive shaft, and the rotor disk is centered relative to the sliding partner by a centering structure.

4. The hydrostatic axial piston machine according to claim 3 , wherein the centering structure comprises:
a centering collar on one of the sliding partner and the rotor disk; and
a turned centering recess on the other of the sliding partner and the rotor disk.

5. The hydrostatic axial piston machine according to claim 1 , wherein displacer spaces of the displacer units are configured to be connected fluidically to two working ports in alternation during operation by the joint heads, the flange disk and a distributor plate, on which the flange disk rests.

6. The hydrostatic axial piston machine according to claim 1 , wherein the pistons and the joint heads define recesses open toward displacer spaces of the displacer units, the recesses being configured to compensate for a gap between the pistons and joint heads, and the cylinder sleeves.

7. The hydrostatic axial piston machine according to claim 1 , wherein the oblique angle of axis of rotation of the rotor disk relative to the axis of the drive shaft is configured to be variable.

8. The hydrostatic axial piston machine according to claim 7 , wherein the rotor disk rotates relative to a swashplate which is fixed in a direction of rotation of the drive shaft, has a central passage for the drive shaft, and the swashplate is at an oblique angle, relative to the axis of the drive shaft, that is configured to be variable.

9. The hydrostatic axial piston machine according to claim 7 , wherein the oblique angle of the axis of rotation of the rotor disk is configured to be variable in opposite directions from a position in which the stroke of the pistons in the cylinder sleeves is zero.

10. The hydrostatic axial piston machine according to claim 1 , further comprising:
a pressure medium path, via which displacer spaces of the displacer units are filled from an interior of the housing.

11. The hydrostatic axial piston machine according to claim 10 , further comprising:
a low-pressure port connected to the interior of the housing.

Assignees

• Bosch Gmbh Robert

Inventors

• Dantlgraber Joerg
• Breuer David
• Weingart Joerg
• Gaumnitz Michael
• Simon Marcus
• Illmann Andreas
• Gesterkamp Christoph

Classifications

• F04B1/24 Primary

  inclined to the main shaft axis · CPC title

• F03C1/0652

  Cylinders · CPC title

• F01B3/0085

  Pistons · CPC title

• F04B1/124

  Pistons · CPC title

• F01B3/0052

  Cylinder barrel · CPC title