Hydrostatic Axial Piston Machine

Abstract

A hydrostatic axial piston machine includes a drive shaft and a plurality of cylinder sleeves in which a spherical or ball-shaped section and a spherical or ball-shaped piston are inserted to delimit a respective displacer chamber. The sections are secured on a rotor, while the pistons are secured on a piston disk or piston drum. The piston disk is configured to be tilted at different pivoting angles relative to the rotor in a variable-displacement machine, or the piston disk is tilted continuously relative to the rotor in a constant-displacement machine. The rotor and the piston disk are coupled to one another for conjoint rotation by a driving device. The rotor and the piston disk can also be coupled indirectly by a drive shaft of the machine. A sliding joint axial with respect to a drive shaft is arranged between the rotor and the piston disk.

What is claimed is: 
     
         1 . A hydrostatic axial piston machine, comprising:
 a drive shaft;   a rotor having a plurality of spherical or ball-shaped sections arranged thereon;   a piston disk having a plurality of pistons arranged thereon, the piston disk being configured to be tilted relative to the rotor or the rotor being configured to be tilted relative to the piston disk;   a plurality of cylinder sleeves with each cylinder sleeve having a respective section of the rotor and a respective piston of the piston disk inserted therein to define a respective displacer chamber; and   a driving device configured to couple the piston disk and the rotor for conjoint rotation,   wherein an axial sliding joint is arranged between the rotor and the piston disk.   
     
     
         2 . The hydrostatic axial piston machine according to  claim 1 , wherein the rotor is arranged perpendicularly to the drive shaft and is one of connected to the drive shaft for conjoint rotation or formed integrally therewith, and wherein the piston disk is configured to be tilted relative to the drive shaft. 
     
     
         3 . The hydrostatic axial piston machine according to  claim 1 , wherein the driving device has a joint having a transverse axis, wherein two journals are arranged along the transverse axis, the journals being inserted into two mutually opposite axial slotted holes or grooves, or wherein a pin is arranged along the transverse axis, the pin being inserted into two mutually opposite axial slotted holes or grooves. 
     
     
         4 . The hydrostatic axial piston machine according to  claim 1 , wherein the driving device has two joints having respective transverse axes, and wherein the two transverse axes are set at 90 degrees to one another, and wherein two journals are arranged along each transverse axis, the journals being inserted into two mutually opposite axial slotted holes or grooves, or wherein a continuous pin is arranged along each transverse axis, the pin being inserted into two mutually opposite axial slotted holes or grooves. 
     
     
         5 . The hydrostatic axial piston machine according to  claim 3 , wherein laterally flattened sliding blocks are placed on end sections of the journals or on the pin or pins, the sliding blocks being pivotable about the transverse axis and being inserted into the slotted holes or grooves in a sliding manner. 
     
     
         6 . The hydrostatic axial piston machine according to  claim 1 , wherein the driving device has at least one Cardan joint, the Cardan joint having a central part with two transverse axes, along each of which two journals inserted into holes extend. 
     
     
         7 . The hydrostatic axial piston machine according to  claim 6 , wherein the central part is an intermediate sleeve arranged between an outer circumference of the drive shaft or the rotor and an inner circumference of the piston disk or an extension thereof. 
     
     
         8 . The hydrostatic axial piston machine according to  claim 1 , wherein the driving device has a central bushing that is articulated on the drive shaft or on the rotor and that is articulated on the piston disk or an extension thereof. 
     
     
         9 . The hydrostatic axial piston machine according to  claim 8 , wherein the central bushing is articulated on the drive shaft or on the rotor by two rotary-sliding connectors and is articulated on the piston disk or an extension thereof by two rotary-sliding connectors offset by 90 degrees relative to the rotary-sliding connectors, wherein the rotary-sliding connectors each have a sliding block that is guided in an axial slotted hole or an axial groove, and wherein the rotary-sliding connectors each have a journal that is inserted into a hole. 
     
     
         10 . The hydrostatic axial piston machine according to  claim 1 , wherein the driving device is formed by a plurality of radially inward-directed projections, the radially inward-directed projections each being arranged on a cylinder sleeve and being configured to be engaged in axial grooves of the piston disk or of an extension thereof. 
     
     
         11 . The hydrostatic axial piston machine according to  claim 1 , wherein the driving device is a constant velocity joint having a plurality of balls, and wherein each ball is guided in a first groove and a second groove. 
     
     
         12 . The hydrostatic axial piston machine according to  claim 1 , wherein the driving device has at least two balls or spherical segments that are each guided along a first track set obliquely to the drive shaft and along a second track set obliquely to a longitudinal axis of the piston disk. 
     
     
         13 . The hydrostatic axial piston machine according to  claim 12 , further comprising a pin extending along the first track. 
     
     
         14 . The hydrostatic axial piston machine according to  claim 12 , wherein each ball is guided along the first track and along the second track by two grooves, respectively. 
     
     
         15 . The hydrostatic axial piston machine according to  claim 1 , wherein the driving device is a tripot joint having three spherical segments, which are each guided so as to be movable on one of three radial journals of the drive shaft or of the rotor, the radial journals being distributed uniformly over the circumference, and which are each guided so as to be movable in two axial grooves of the piston disk. 
     
     
         16 . The hydrostatic axial piston machine according to  claim 1 , wherein the driving device is formed by the spherical or ball-shaped sections and by the cylinder sleeves and by necks of the pistons. 
     
     
         17 . The hydrostatic axial piston machine according to  claim 1 , wherein the driving device has a plurality of recesses into which corresponding pins are configured to be engaged. 
     
     
         18 . The hydrostatic axial piston machine according to  claim 1 , wherein the driving device has a curved toothing on the drive shaft or on the rotor and on the piston disk. 
     
     
         19 . The hydrostatic axial piston machine according to  claim 1 , wherein the driving device has a flexible element.