Axial piston engine having a housing with a radially widened interior portion

Abstract

The invention relates to a hydrostatic axial piston engine ( 1 ), having a housing ( 2 ), which with two transverse walls ( 18 a , 18 b ) and a peripheral wall ( 2 c ) connecting these longitudinally to one another surrounds an interior ( 3 ), a driving shaft ( 19 ), which extends longitudinally in the housing ( 2 ) and is mounted rotatably in the housing ( 2 ), and a swash plate ( 4 ), which is mounted longitudinally adjacent to the cylinder drum ( 5 ) in the housing ( 2 ) and supported against which in an articulated manner are pistons ( 9 ) that are reciprocably mounted in approximately longitudinally extending piston holes ( 6 ) in the cylinder drum ( 5 ). In order to improve the axial piston engine ( 1 ) in terms of a spatially advantageous shape, the peripheral wall ( 2 c ) has at least one radial elevation ( 34 a ), which is constructed in an elongate manner in the longitudinal direction of the housing ( 2 ) and which is formed by two peripheral wall portions ( 2 e ), which are arranged in an angular or U-shaped manner and delimit a radially widened interior portion ( 36 ).

1 . Hydrostatic axial piston engine, having
 a housing, which with two transverse walls and a peripheral wall connecting these longitudinally to one another surrounds an interior,   a driving shaft, which extends longitudinally in the housing and is mounted rotatably in the housing, and   a swash plate, which is mounted longitudinally adjacent to the cylinder drum in the housing and supported against which in an articulated manner are pistons that are reciprocably mounted in approximately longitudinally extending piston holes in the cylinder drum,   
       wherein the peripheral wall has at least one radial elevation, which is constructed in an elongate manner in the longitudinal direction of the housing and which is formed by two peripheral wall portions, which are arranged in an angular or U-shaped manner and delimit a radially widened interior portion. 
     
     
         2 . Hydrostatic axial piston engine according to  claim 1 , 
       wherein the elevation extends over the length (L 1 ) of the interior. 
     
     
         3 . Hydrostatic axial piston engine according to  claim 1 , 
       wherein two elevations are disposed opposite one another or a plurality of elevations, for example three or four, are disposed offset relative to one another in the peripheral direction. 
     
     
         4 . Hydrostatic axial piston engine according to  claim 1 , wherein the cylinder drum with its inner side remote from the swash plate rests against a cam disc disposed between it and a transverse wall and the at least one elevation extends longitudinally also over the transverse wall or over both transverse walls. 
     
     
         5 . Hydrostatic axial piston engine according to  claim 1 , wherein in the apex of the elevation a hydraulic connection point with a connection opening is and/or are disposed. 
     
     
         6 . Hydrostatic axial piston engine, having
 a housing, which with two transverse walls and a peripheral wall connecting these longitudinally to one another surrounds an interior,   a driving shaft, which extends longitudinally in the housing and is mounted rotatably in the housing, and   a swash plate, which is mounted longitudinally adjacent to the cylinder drum in the housing and supported against which in an articulated manner are pistons that are reciprocably mounted in approximately longitudinally extending piston holes in the cylinder drum,   
       wherein, the cylinder drum rests with its side remote from the swash plate against a cam disc disposed between it and a transverse wall, 
       wherein on the periphery of this transverse wall a radial elevation with an angular or U-shaped cross section is disposed, in the apex region of which a hydraulic connection point with a connection opening is disposed. 
     
     
         7 . Axial piston engine according to  claim 6 ,
 wherein the elevation extends at least partially longitudinally also along the peripheral wall or also along the other transverse wall.   
     
     
         8 . Hydrostatic axial piston engine according to  claim 5 , wherein at the hydraulic connection point fastening elements are disposed, which are parts of a fastening device for fastening a hydraulic line or a connection fitting. 
     
     
         9 . Hydrostatic axial piston engine according to  claim 8 ,
 wherein at the connection point at least one, preferably flat, seating face is provided.   
     
     
         10 . Hydrostatic axial piston engine according to  claim 8   wherein the fastening elements are disposed on a second elevation that is elevated from the first elevation, for example only in the region of the connection point.   
     
     
         11 . Hydrostatic axial piston engine according to  claim 1 , wherein the throughput volume of the axial piston engine may be either increased or decreased by means of an adjusting device having an adjusting mechanism, and preferably the swash plate is mounted as part of the adjusting device pivotably about an oriented swiveling axis in a swivel joint. 
     
     
         12 . Hydrostatic axial piston engine according to  claim 11 ,
 wherein the adjusting mechanism and/or a swivel-limiting device are/is of an elongate design and extend/extends transversely offset in relation to the swivelling axis in the longitudinal direction of the axial piston engine in the widened interior portion or in one of the widened interior portions.   
     
     
         13 . Hydrostatic axial piston engine according to  claim 1 , wherein one or two elevations having a transversely oriented mutual spacing are disposed transversely offset in relation to the swivelling axis. 
     
     
         14 . Hydrostatic axial piston engine according to  claim 12   wherein two transversely mutually spaced-apart radial elevations with widened interior portions are disposed on both sides of the swivelling axis and preferably an adjusting mechanism and a swivel-limiting device are disposed on each side of the swivelling axis, in particular are disposed obliquely opposite one another.   
     
     
         15 . Hydrostatic axial piston engine according to  claim 4 ,
 wherein the transverse wall is formed by the base wall of a pot-type housing.   
     
     
         16 . Hydrostatic axial piston engine according to  claim 1 , wherein the housing at least in the region of the at least one elevation has a cross-sectional shape delimited by four side wall portions, in particular a square or rectangular cross-sectional shape, preferably with rounded corners.