Axial Piston Machine

Patent metadata

Field	Value
Publication number	US-10465668-B2
Application number	US-201515526972-A
Country	US
Kind code	B2
Filing date	Sep 29, 2015
Priority date	Nov 18, 2014
Publication date	Nov 5, 2019
Grant date	Nov 5, 2019

Abstract

An axial piston machine for at least one of a pump and a motor operation includes a housing, connection plate, piston drum, and working piston. The connection plate is connected to the housing. The piston drum is arranged on a rotatable drive shaft in the housing interior and defines at least one cylinder bore. The working piston is arranged in a longitudinally displaceable manner in the cylinder bore. The cylinder bore delimits a cylinder space having a changeable volume. The cylinder space is configured to connect to at least one pre-compression space via at least one hydraulic connection. The at least one pre-compression space is defined by a cavity within the connection plate. The cavity is defined by the connection plate and a closing element. The closing element is arranged between the connection plate and the housing interior.

First claim

The invention claimed is:

1. An axial piston machine for at least one of a pump and a motor operation, comprising:
a housing defining a housing interior;
a connection plate connected to the housing;
a piston drum arranged on a rotatable drive shaft in the housing interior and defining at least one cylinder bore; and
a working piston arranged in a longitudinally displaceable manner in the cylinder bore,
wherein the cylinder bore delimits a cylinder space having a changeable volume,
wherein the cylinder space is configured to be connected to at least one pre-compression space via at least one hydraulic connection,
wherein the at least one pre-compression space is defined by a cavity within the connection plate and the cavity is defined by the connection plate and a closing structure, and wherein the closing structure is arranged between the connection plate and the housing interior, and
wherein, during rotation of the piston drum, the cylinder space is hydraulically connected to the pre-compression space prior to being hydraulically connected to a high-pressure connection.

2. The axial piston machine as claimed in claim 1 , wherein the closing structure and the connection plate have a mutual contact area.

3. The axial piston machine as claimed in claim 2 , wherein the closing structure and the connection plate are in direct contact.

4. The axial piston machine as claimed in claim 1 , wherein the closing structure is a screw.

5. The axial piston machine as claimed in claim 1 , wherein a hydraulic attachment to a distributor plate is formed in the connection plate for each pre-compression space.

6. The axial piston machine as claimed in claim 1 , wherein the at least one pre-compression space defines a pre-compression volume configured to reduce a hydraulic pulsation of the axial piston machine.

7. The axial piston machine as claimed in claim 1 , wherein, during the rotation of the piston drum, the cylinder space is hydraulically connected to the pre-compression space between being hydraulically connected to a low-pressure connection and the high-pressure connection.

8. The axial piston machine as claimed in claim 7 , wherein, during rotation of the piston drum, the cylinder space remains hydraulically connected to the pre-compression space after being hydraulically connected to the high-pressure connection.

9. An axial piston machine as for at least one of a pump and a motor operation, comprising:
a housing defining a housing interior;
a connection plate connected to the housing;
a piston drum arranged on a rotatable drive shaft in the housing interior and defining at least one cylinder bore; and
a working piston arranged in a longitudinally displaceable manner in the cylinder bore,
wherein the cylinder bore delimits a cylinder space having a changeable volume,
wherein the cylinder space is configured to be connected to at least one pre-compression space via at least one hydraulic connection,
wherein the at least one pre-compression space is defined by a cavity within the connection plate and the cavity is defined by the connection plate and a closing structure, and wherein the closing structure is arranged between the connection plate and the housing interior, and
wherein the closing structure hydraulically separates the pre-compression space from the housing interior.

Assignees

• Bosch Gmbh Robert

Inventors

• Merz Armin
• Maier Eberhard
• Vahle Dirk
• Brusset Francois

Classifications

• F04B1/20 Primary

  having rotary cylinder block · CPC title

• F04B11/00

  Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation · CPC title

• F04B11/0025 Primary

  the spring fluid being in direct contact with the pumped fluid · CPC title