Axial piston machine and control plate for an axial piston machine

Abstract

In the case of a control plate for an axial piston machine having at least two control openings ( 31, 32 ), by means of which cylinder bores ( 9 ) of a cylinder drum ( 4 ) rotatably mounted in a housing ( 2 ) are alternately connected, on rotation of the cylinder drum ( 4 ), to a high-pressure connection and a low-pressure connection, an outwardly extending extension surface ( 40 ) is formed on a partial region of the outer circumference of the control plate ( 20 ), the extension surface being designed for defined bearing against a holding element ( 52, 53 ) of the axial piston machine ( 1 ) in order to achieve a rotation locking for the control plate ( 20 ).

1 . Control plate for an axial piston machine having at least two control openings, by means of which cylinder bores of a cylinder drum rotatably mounted in a housing are alternately connected, on rotation of the cylinder drum, to a high-pressure connection and a low-pressure connection,
 wherein an outwardly extending extension surface is formed on a partial region of the outer circumference of the control plate, the extension surface being designed for defined bearing against a holding element of the axial piston machine in order to achieve a rotation locking for the control plate.   
   
   
       2 . Control plate according to  claim 1 ,
 wherein the extension surface has a straight edge region for bearing against a plane wall of the holding element.   
   
   
       3 . Control plate according to  claim 2 ,
 wherein the extension surface has an edge recess.   
   
   
       4 . Control plate according to  claim 3 ,
 wherein the recess is designed to cooperate with an oval or cylindrical holding element.   
   
   
       5 . Control plate according to  claim 1 ,
 wherein an indentation is formed in the edge region of the extension surface and/or in an edge region of the control plate opposite the extension surface.   
   
   
       6 . Control plate according to  claim 1 ,
 wherein a through-opening is formed in the control plate, the radially inner edge of the control plate being designed as a centring surface which centres the control plate on a centring body on the housing.   
   
   
       7 . Control plate according to  claim 6 ,
 wherein the centring surface is composed of a plurality of partial surfaces formed on segments of the inner edge of the control plate which extend radially inwardly into the through-opening and are separated from one another by recesses.   
   
   
       8 . Control plate according to  claim 7 ,
 wherein the radial extent of the individual recesses is of such a size that a gap results in the region of the recesses between the control plate and the centring body.   
   
   
       9 . Control plate according to  claim 1 ,
 wherein the outer edge region of the control plate is reduced in the radial direction in the region of the at least one control opening connected to the low-pressure connection.   
   
   
       10 . Control plate according to  claim 1 ,
 wherein it is formed by a stamping.   
   
   
       11 . Axial piston machine having a cylinder drum which is rotatably mounted in a housing and in which are made cylinder bores, in which pistons are axially displaceably arranged, the cylinder bores having openings towards an end side of the cylinder drum, which are alternately in connection, on a rotation of the cylinder drum, with a high-pressure connection and low-pressure connection via at least two control openings of a control plate,
 wherein the control plate is designed according to  claim 1 .   
   
   
       12 . Control plate according to  claim 11 ,
 wherein the machine is designed as a swash-plate machine, the holding element being formed by a setting piston guide.   
   
   
       13 . Axial piston machine according to  claim 11 ,
 wherein a through-opening is formed in the control plate, and in that the cylinder drum is arranged on a shaft in a manner fixed against relative rotation, the shaft being mounted in the housing on the side of the control plate, and the control plate being centred on an outer bearing race of a rolling bearing by a centring surface formed on the inner edge of the control plate.