Brueninghaus Hydromatik Gmbh

Bosch Rexroth Ag

Thomas Kunze

Manfred Lotter

Wilfried Eichner

Rainer St&ouml;lzer

Bernd H&uuml;hn

A hydrostatic piston machine with a cylinder drum, which is rotatably mounted in a housing, is provided. A plurality of cylinder bores are disposed in the cylinder drum, which bores can be connected via cylinder openings provided in the cylinder drum to a first control opening and a second control opening. The first control opening is connected to a low-pressure line and the second control opening to a high-pressure line. The first control opening is connected via a first connection and a second connection to a channel, wherein the first connection and, lying opposite, the second connection are disposed at the first control opening.

Hydrostatic piston machine with output volume flow in the circumferential direction

The invention relates to a device () for state monitoring in hydrostatic displacement units (), in particular in axial piston machines () operated as a pump or as a motor. The device () comprises an acquisition unit () with a multiplicity of sensors () which are attached to the hydrostatic displacement unit () and serve to acquire monitoring data () and operating data (), and an evaluating unit () which has a device () for analysing the monitoring data in the frequency range and a device () for analysing the monitoring data in the time range. A diagnostic unit () with an output unit () is connected to the evaluating unit ().

Device and method for state monitoring in hydrostatic displacement units

The invention relates to a method for the production of a ball jointed connection between a guide shoe ( ) and a cylinder piston ( ) of a piston machine. A spherical cap-shaped recess ( ) is first of all formed on the cylinder piston ( ) and/or the guide shoe ( ), whereby the recess ( ) is undercut in such a way that the spherical cap-shaped recess ( ) comprises a solid angle area (&agr;) of over 180&deg;, and the diameter (D) in the region of the equator plane ( ) is greater than the diameter (d) of the recess ( ). Furthermore, a spherical head ( ) is formed on the corresponding counterpart, that is the guide shoe ( ) and/or the cylinder piston ( ). In accordance with a first version of the invention, the spherical head ( ) is pushed into the spherical cap-shaped recess ( ) in such a way that the edge area ( ) surrounding the spherical cap-shaped recess ( ) is elastically deformed when the spherical head ( ) is pushed in, and the surrounding edge area ( ) grips behind the spherical head ( ). Alternatively, the spherical head ( ) has a flattening ( ) which is plastically deformed after introduction of the spherical head ( ) into the recess ( ).

Method for the production of a ball jointed connection

The invention relates to an axial piston machine (,) comprising a housing (,), a drive shaft (,) mounted in a rotational manner in the housing (,) around a drive shaft axis (,), a cylinder drum (,) which is connected to the drive shaft (,) in a non-rotational manner and in which are embodied cylinders (,) for receiving axially movable pistons (,), and a control plate (,) with control openings (,) designed to cyclically connect the cylinders (,) with a high-pressure and a low-pressure line. The invention provides for a pressing device with at least one centrifugal body (,), which is impinged upon by a centrifugal force (F,) that increases with the number of rotations per minute (n) of the cylinder drum (,). The invention also provides for a force deflection unit (,) designed to transform the centrifugal force (F,) acting on the centrifugal body (,) into a force acting against the cylinder drum (,), whereby said force has a component (F,) which is aligned towards the control plate (,) and in an axial position in relation to the drive shaft axis (,).

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Nagold, Germany

Thomas Kunze