Brueninghaus Hydromatik Gmbh

Robert Bosch

Roland Belser

Hermann Maier

Ralf Lemmen

An adjustable axial piston machine includes a housing, a pivot cradle and a bearing shell which is arranged between the housing and the pivot cradle. The bearing shell includes a bearing section in the shape of an annular section with an inner end and a bearing shell end region which extends in one plane with an outer end. A bearing surface, the geometry of which corresponds to the bearing section, is provided on the housing. An outer supporting force point at the outer end and an inner supporting force point at the inner end lie on a straight line which extends on the inner supporting force point tangentially with respect to the bearing section. If a force is present in the circumferential direction of the bearing section, the inner supporting force point and the outer supporting force point are subjected to a supporting force substantially parallel to the straight line.

Adjustable axial piston machines having a bearing shell for the pivot cradle

The invention relates to an axial position machine () comprising cylinder bores () that are located in a cylinder drum (), pistons () that can be axially displaced in said boxes () and helical compression springs () that are provided in the cylinder bores (). Each piston () is pre-stressed against a swash plate (), which is supported on the cylinder drum (). The diameter of the helical compression spring () narrows () between the upper and lower ends.

Axial piston machine

The invention relates to a regulator device () for a hydraulic pump which pumps into at least one working pipe (), and to a valve unit for said pump. The pumping volume of the hydraulic pump () is regulated with the aid of a regulator device () exposed to a regulating pressure which is regulated by an adjusting valve () in conformity to a first and a second pressure. The first pressure passes through a first pressure pipe () and acts on a first measuring surface, the second pressure passes through a second pressure pipe () and acts on a second pressure surface opposite to the first surface of the adjusting valve (), the first pressure being higher than the second pressure. Said invention is characterized in that a pressure chamber () is arranged between the first and second measuring surfaces, thereby forming a discharge channel towards the second pressure pipe ().

Regulator device and a valve unit for a hydraulic pump

The invention relates to a regulatory device for a pump (), whose delivery volume can be adjusted, said device comprising a control valve unit () for regulating a control pressure that operates in a control pressure chamber () of an actuator (). The control valve unit () comprises a threshold value control valve () and a delivery flow control valve (). The threshold value control valve () is subjected to a pressure from a working line () on the delivery side and the delivery flow control valve () can be subjected to a consumer input pressure taken from a consumer supply line (), at a comparison pressure connection (). In addition, the delivery flow control valve () is subjected to a control pressure that counteracts the consumer input pressure, at a regulatory pressure measurement connection (). A control pressure feed connection () of the delivery flow control valve () can be connected to the working pressure line () on the delivery side in a variable manner, by means of the threshold value control valve ().

Regulatory device comprising a threshold valve control valve

The invention relates to an axial piston machine having a swash plate () and a control piston () which contacts the swash plate () by way of a slide block () which is partially received by the swash plate () or the control piston (). The slide block () can be inclined at least in a direction relative to the swash plate () or the control piston () and can be inserted through an opening into a cutout () constructed in the swash plate () or the control piston (), the slide block () being fixed in the cutout () by fixing regions () constructed in the cutout (). Provided in the swash plate () or the control piston (), there is a resilient element () which acts on the slide block () with a force directed towards the regions () fixing the slide block ().

Axial piston machine having a fixable slide block on the swash plate

The invention relates to a valve block () for a control device comprising a valve () whose valve piston () is subjected to the action of a control pressure when in its open position and to the action of a return spring () when in its closed position. The closing force of the return spring () can be decreased or increased by an actuator, which can be displaced toward a position that increases the closing force and one that decreases the closing force. In order to simplify the displacement or adjustment and to improve reliability, the displacing movement of the actuator () in the direction of movement that increases the closing force of the return spring () is limited by a stop element () in a position in which the closing force of the return spring () reaches its limited maximum value.

Valve block for a control device, particularly for a hydrostatic machine

An adjusting device ( ) for adjusting the swash plate ( ) of an axial piston engine ( ) with a swash-plate construction has an actuating piston ( ) which acts on the swash plate ( ) of the axial piston engine ( ); and a control value ( ). The control valve ( ) is used to regulate the actuating pressure which is present in an actuating volume ( ) and which is acting on the actuating piston ( ), in accordance with a control force acting on a valve piston ( ) of the control valve ( ). The actuating piston ( ) is structurally separate from the control valve ( ) and the actuating piston ( ) is connected to the valve piston ( ) of the control valve ( ) by a readjusting spring ( ) that opposes the control force.

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Haigerloch, Germany

Roland Belser