Brueninghaus Hydromatik Gmbh

Juan Moya

Rolf Brockerhoff

The invention relates to a total power regulation device for two pumps (), each of which is connected to a working conduit (). The delivery volume of the pumps () can be set separately by a respective adjusting device (), whereby a control pressure that is active in each adjusting device () can be set by a total power regulation valve (). The latter () has a measuring surface () of the total power regulation valve () of one pump () can be directly exposed to the working pressure of the other pump ().

Total power controller

The invention relates to a hydrostatic drive comprising at least one hydraulic pump () and a first and a second hydraulic motor (), which are respectively connected to said hydraulic pump () by means of two service lines (') and whose absorption volume can be regulated by means of a regulator (). One respective hydraulic motor () for a drive train is provided per respective right or left vehicle side. The regulators () are actuated by a respective regulator piston (). The regulator pistons () of both hydraulic motors () can be subjected to a force by means of a common high pressure, which equals the highest pressure that prevails in the service lines (&#x2032;) of both hydraulic motors (). Each force is opposed to a respective counter-force, which is generated by a control pressure in a control pressure chamber (&#x2032;). The pressure in the control pressure chamber ()/(&#x2032;) of the first and second regulator pistons ()/() of the first and second hydraulic motors ()/() can be reduced by means of first and second pressure regulating valves ()/() in relation to a tank () and the first and second pressure regulating valves ()/() are impinged by the respectively higher pressure of the first and second service lines ()/(&#x2032;) that are allocated to the first and second hydraulic motors ()/(), in the form of a controlled variable.

Hydrostatic drive

The invention relates to an axial piston motor constructed as a swivel-slide structure with a channel to feed cleaning fluid to the driving shaft bearings. The axial piston motor (,) comprises a swivelling cylinder drum (,) and a driving shaft (,) supported on driving shaft bearings (,). The driving shaft (,) is connected to a driving shaft flange (,) to which movable pistons (,) are coupled through the cylinder bores (,) of the cylinder drum (,), and on which the cylinder drum (,) is supported by a central journal (,). In addition, the invention provides for a control specular element (,) with reniform control elements and a regulating device (,), by which the cylinder drum (,) together with the control specular element (,) can be swivelled. According to the improvement added by the invention, the cleaning fluid channel is taken through the setting journal (,) and control specular element (,) up to the central journal (,). The cleaning fluid channel then continues inside the central journal (,) and the driving shaft (,) and exists at the driving shaft bearings (,) that require feeding.

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Horb, Germany

Juan Moya