Patent ID: 7661351
Filing Date: 2010-02-16
Classification: F04B,F16H

Abstract:
1. A hydrostatic axial piston machine, comprising a cylinder block rotatable about a first axis and having a plurality of cylinder bores which are arranged on a reference circle concentric to the first axis and extending in the axial direction, and a plane which is rotatable about a second axis and on which a number, corresponding to the number of cylinder bores, of pistons penetrating displaceably into the associated cylinder bores are articulated pivotably on a second reference circle concentric to the second axis and form a belt, and also means for synchronizing the rotations of the cylinder block about the first axis and of the driven shaft about the second axis, the cylinder block and the driven shaft being continuously adjustable with their two axes between a first position, in which the two axes are parallel, and a second position, in which the two axes form with one another a maximum pivot angle different from zero, wherein the maximum pivot angle is greater than 45°; wherein the rotatable plane is arranged at one end of a driven shaft rotating about the second axis, in that the synchronizing means comprise a central synchronizing shaft which is arranged within the belt of pistons and which is in rotationally fixed engagement at one end via a first joint with the driven shaft and at the other via a second joint with the cylinder block, and in that in order to achieve a pivot angle different from zero, the synchronizing shaft is pivotable on all sides in a central funnel-shaped orifice of the driven shaft, said orifice being arranged within the belt of pistons in such a way that the maximum pivot angle of the machine is determined decisively by the size and configuration of the funnel-shaped orifice and of the cross section of the synchronizing shaft; wherein the edge contour of the funnel-shaped orifice is a polygon with a number of corners corresponding to the number of pistons, and in that the corners of the polygon are arranged in each case between adjacent pistons and form a bulge; and wherein, to increase the maximum pivot angle, the funnel-shaped orifice is widened locally in each case between adjacent pistons by means of bulges, and in that the cross-sectional contour of the synchronizing shaft is adapted to the bulges.