Hydrostatic axial piston machine employing a bent-axis construction
AssigneeLinde Hydraulics GmbH & Co. KG
InventorMartin Bergmann
Life of this patent
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Abstract
A bent-axis hydrostatic axial piston machine (1) has a drive shaft (4) rotatable around an axis of rotation (Rt) and having a drive flange (3). A cylinder drum (7) is rotatable around an axis of rotation (Rz). The cylinder drum (7) includes a plurality of piston bores (8) concentric to the axis of rotation (Rz) of the cylinder drum (7) and in each of which piston bores (8) there is a longitudinally displaceable piston (10). The pistons (10) are fastened in an articulated manner to the drive flange (3). Between the drive shaft (4) and the cylinder drum (7) there is a constant velocity driving joint (30) in the form of a cone-beam semi-roller joint (31).
Claims30
A hydrostatic axial piston machine utilizing a bent-axis construction, comprising:
- a drive shaft rotatable around an axis of rotation and provided with a drive flange;
- a cylinder drum rotatable around an axis of rotation offset from the axis of rotation of the drive shaft;
- a plurality of piston bores located in the cylinder drum and concentric to the axis of rotation of the cylinder drum;
- a longitudinally displaceable piston located in each piston bore, wherein the pistons are fastened in an articulated manner to the drive flange;
- and
- a driving joint between the drive shaft and the cylinder drum for rotationally synchronous rotation of the cylinder drum and of the drive shaft, wherein the driving joint comprises a cone-beam semi-roller joint,
- wherein the cone-beam semi-roller joint comprises at least one roller pair with two semi-cylindrical half-rollers, wherein the semi-cylindrical half-rollers are flattened along an axis of rotation separate from the axis of rotation of the drive shaft and the axis of rotation of the cylinder drum and the half-rollers form flat sliding surfaces on the flattened sides at which the half-rollers of the roller pair are in contact with each other to form a contact surface.
Dependencies are inferred from the claim text.