Hydrostatic piston machine comprising a rotatable cam disk

Abstract

The invention relates to a hydrostatic piston machine. The hydrostatic piston machine comprises a housing in which a cylinder drum is rotatably arranged. A first group of cylinder bores and a second group of cylinder bores are arranged in the cylinder drum. Arranged longitudinally displaceably in the cylinder bores are respective pistons, which are supported on a swash plate which may be inclined about at least one swivelling axis. The first group of cylinder bores is temporarily connected to a first hydraulic circuit via first control slots ( 50, 51 ) of a control plate, when the cylinder drum is rotated. Accordingly, the cylinder bores of the second group are temporarily connected to a second hydraulic circuit via second control slots ( 57, 58 ) of the control plate ( 32′ ), when the cylinder drum is rotated. The relative position of the first and/or second control slots ( 50, 51; 57, 58 ) may be altered relative to the at least one swivelling axis of the swash plate.

1 . Hydrostatic piston machine comprising a cylinder drum rotatably arranged in a housing having a first group of cylinder bores which are temporarily connected to a first hydrostatic circuit via first control slots of a control plate, when the cylinder drum is rotated, and having a second group of cylinder bores which are temporarily connected to a second circuit via second control slots of the control plate when the cylinder drum is rotated, pistons being longitudinally displaceably arranged in the cylinder bores which are supported on a swash plate, the swash plate being able to be inclined about at least one swivelling axis for producing a piston stroke, characterised in that the position of the first and/or second control slots may be altered relative to the at least one swivelling axis. 
   
   
       2 . Hydrostatic piston machine according to  claim 1 , wherein the alteration of the relative position of the first control slots and the alteration of the relative position of the second control slots differ from one another. 
   
   
       3 . Hydrostatic piston machine according to  claim 1 , wherein the alteration of the relative position of the first control slots and the alteration of the relative position of the second control slots are interdependent. 
   
   
       4 . Hydrostatic piston machine according to  claim 3 , wherein the position of the first control slots and the position of the second control slots may be altered in the same direction. 
   
   
       5 . Hydrostatic piston machine according to  claim 3 , wherein the relative position of the first control slots and the relative position of the second control slots may be altered in an opposing manner. 
   
   
       6 . Hydrostatic piston machine according to  claim 1 , wherein the relative position of the first control slots and the relative position of the second control slots may be altered independently of one another. 
   
   
       7 . Hydrostatic piston machine according to,  claim 1 , wherein the control plate comprises a first control plate ring and comprises a second control plate ring, the first control slots being arranged in the first control plate ring and the second control slots being arranged in the second control plate ring. 
   
   
       8 . Hydrostatic piston machine according to  claim 7 , wherein the first control plate ring is configured as a spur gear and/or the second control plate ring is configured as an internal gear wheel, and at least one of the two control plate rings cooperates with a toothing of an adjusting element. 
   
   
       9 . Hydrostatic piston machine according to  claim 8 , wherein the first control plate ring is an internal gear wheel of a planetary gear set and the second control plate ring is a sun wheel of a planetary gear set. 
   
   
       10 . Hydrostatic piston machine according to  claim 8 , wherein the internal gear wheel and the spur gear cooperate with toothings of a first adjusting element and/or a second adjusting element. 
   
   
       11 . Hydrostatic piston machine according to  claim 10 , wherein the first and the second adjusting elements are coupled together by a spur gear unit. 
   
   
       12 . Hydrostatic piston machine according to  claim 10 , wherein the first and the second adjusting elements are respectively driven by a toothed rack.