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US 11,592,012 B2Granted
Hydrostatic piston machine unit
AssigneeRobert Bosch GmbH
InventorsDavid Breuer, Peter Roos, Rudolf Appel, Timo Nafz
Life of this patent
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Abstract
A hydrostatic piston machine unit, which is in particular designed as a hydrostatic axial piston machine unit, comprises at least two driving mechanisms that can be driven synchronously and have displacement pistons which each perform a reciprocating motion in operation and are provided for delivery into a common pressure line. The hydrostatic piston machine unit has a jointly assigned precompression volume for the at least two driving mechanisms.
Claims13
A hydrostatic piston machine unit comprising:
- a first driving mechanism including first displacement pistons that are arranged in a first rotating cylinder part that defines a plurality of first cylinder spaces, each first cylinder space is configured to be alternately connected via a first respective connecting opening to a first low-pressure control port and a first high-pressure control port of a first stationary control part, on which two first changeover regions are arranged between the first low-pressure control port and the first high-pressure control port, the first displacement pistons configured to reverse direction of motion within the two first changeover regions at respective first dead center positions;
- a second driving mechanism including second displacement pistons that are arranged in a second rotating cylinder part that defines a plurality of second cylinder spaces, each second cylinder space configured to be alternately connected via a second respective connecting opening to a second low-pressure control port and a second high-pressure control port of a second stationary control part, on which two second changeover regions are arranged between the second low-pressure control port and the second high-pressure control port, the second displacement pistons configured to reverse direction of motion within the two second changeover regions, each of the first and second displacement pistons performing a reciprocating motion in operation so as to deliver fluid into a common pressure line or a common pressure connection via the respective first or second high-pressure control port;
- at least one cavity defining at least one precompression volume that is jointly assigned to both the first and second driving mechanisms;
- a first connecting line arranged in one of the two first changeover regions so as to connect the first cylinder spaces to a first cavity of the at least one cavity;
- and
- a second connecting line arranged in one of the two second changeover regions so as to connect the second cylinder spaces to the first cavity,
- wherein the first cavity is connected permanently in a restricted manner to the common pressure connection via a third connecting line.
4 more elements
A hydrostatic piston machine unit comprising:
- a first driving mechanism including first displacement pistons that are arranged in a first rotating cylinder part that defines a plurality of first cylinder spaces, each first cylinder space is configured to be alternately connected via a first respective connecting opening to a first low-pressure control port and a first high-pressure control port of a first stationary control part, on which two first changeover regions are arranged between the first low-pressure control port and the first high-pressure control port, the first displacement pistons configured to reverse direction of motion within the two first changeover regions at respective first dead center positions;
- a second driving mechanism including second displacement pistons that are arranged in a second rotating cylinder part that defines a plurality of second cylinder spaces, each second cylinder space configured to be alternately connected via a second respective connecting opening to a second low-pressure control port and a second high-pressure control port of a second stationary control part, on which two second changeover regions are arranged between the second low-pressure control port and the second high-pressure control port, the second displacement pistons configured to reverse direction of motion within the two second changeover regions, each of the first and second displacement pistons performing a reciprocating motion in operation so as to deliver fluid into a common pressure line or a common pressure connection via the respective first or second high-pressure control port;
- at least one cavity defining at least one precompression volume that is jointly assigned to both the first and second driving mechanisms;
- a first connecting line arranged in one of the two first changeover regions so as to connect the first cylinder spaces to a first cavity of the at least one cavity;
- and
- a second connecting line arranged in one of the two second changeover regions so as to connect the second cylinder spaces to the first cavity,
- wherein the first cavity defines a first precompression volume of the at least one precompression volume, and the first precompression volume corresponds to a volume of one of the first and second cylinder spaces.
4 more elements
Dependencies are inferred from the claim text.