Hydrostatic axial piston machine

Abstract

The invention relates to a hydrostatic axial piston engine with a cylinder drum ( 106 ) which is mounted rotatably in a housing ( 103 ). Longitudinally displaceable working pistons ( 111 ) are disposed in cylinder boreholes ( 110 ) in the cylinder drum ( 106 ). The working pistons ( 111 ) are connected movably to sliding blocks ( 149 ) and are supported on a face ( 116 ) of an inclined disk ( 115 ). Furthermore, the hydrostatic axial piston engine ( 101 ) has a control piston ( 126 ) which interacts with the inclined disk ( 115 ) for adjusting an angle of inclination of the face ( 116 ) with respect to an axis of rotation ( 144 ) in the cylinder drum ( 106 ). The control piston ( 126 ) is supported over a control piston sliding block ( 149 ′) on the face ( 116 ) of the inclined disk ( 115 ) in order to exert a regulating force on the inclined disk ( 115 ).

1 . Hydrostatic axial piston machine having a cylinder drum, which is mounted rotatably in a housing and in which working pistons are disposed in a longitudinally displaceable manner in cylinder bores, wherein the working pistons are movably connected to sliding shoes and the working pistons are supported via the sliding shoes against a contact surface of a swash plate, and having a positioning piston, which interacts with the swash plate in order to adjust an angle of inclination of the contact surface relative to an axis of rotation of the cylinder drum,
 wherein the positioning piston is connected to a positioning-piston sliding shoe and via the positioning-piston sliding shoe the contact surface of the swash plate is loaded with a positioning force.   
   
   
       2 . Hydrostatic axial piston machine according to  claim 1 ,
 wherein the positioning piston and the positioning-piston sliding shoe are connected to one another by a ball joint.   
   
   
       3 . Hydrostatic axial piston machine according to  claim 1 ,
 wherein the positioning piston and the working pistons have an identical geometry.   
   
   
       4 . Hydrostatic axial piston machine according to
   claim 1 , wherein the positioning-piston sliding shoe and the sliding shoes of the working pistons have an identical geometry.   
   
   
       5 . Hydrostatic axial piston machine according to
   claim 1 , wherein the positioning piston is disposed in a positioning device housing in a longitudinally displaceable manner along a longitudinal axis of the positioning device housing and the longitudinal axis of the positioning device housing extends at least approximately parallel to the axis of rotation of the cylinder drum.   
   
   
       6 . Hydrostatic axial piston machine according to  claim 5 ,
 wherein the positioning piston is disposed in a stepped recess of the positioning device housing and a valve piston is arranged offset in axial direction relative to the positioning piston in the stepped recess.   
   
   
       7 . Hydrostatic axial piston machine according to  claim 5 ,
 wherein for feedback of positional information of the positioning piston a feedback spring is provided, which is supported on the one hand against the positioning piston and on the other hand against a valve piston.   
   
   
       8 . Hydrostatic axial piston machine according to  claim 7 ,
 wherein the feedback spring is identical with press-on springs inserted in the cylinder recesses.   
   
   
       9 . Hydrostatic axial piston machine according to
   claim 1 , wherein the positioning device housing is fastened in a port plate of the axial piston machine.