Adjusting device for an axial piston machine
AssigneeLiebherr Machines Bulle SA
InventorPatrick Wohlhauser
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to an adjusting device for adjusting the swash plate of an axial piston machine comprising an adjusting piston, which is connected to the swash plate of the axial piston machine via an adjusting lever, and a regulator for adjusting the adjusting pressure acting on the adjusting piston in dependence on a control force acting on a control piston of the regulator, wherein the adjusting piston is connected to the control piston via a feedback spring. In accordance with the present disclosure the feedback spring is at least partly received in a pot-shaped recess of the control piston.
Claims18
An adjusting device for adjusting a swash plate of an axial piston machine comprising:
- an adjusting piston, a first end of the adjusting piston connected to the swash plate of the axial piston machine via an adjusting lever, a second end of the adjusting piston positioned opposite the first end and adjacent a control piston,
- a regulator which adjusts an adjusting pressure acting on the adjusting piston in dependence on a control force acting on the control piston of the regulator, and
- a pot-shaped recess forming a hydraulic control volume and housing a feedback spring, the pot-shaped recess formed within an interior of the control piston and extending from a first end of the control piston to a second end of the control piston opposite the first end, the first end of the control piston adjacent the adjusting piston, the pot-shaped recess being hollow and having an open end to form a hydraulic control volume within the control piston extending from the second end of the control piston to a the second end of the adjusting piston, and the feedback spring extending through the hydraulic control volume from the second end of the control piston to the adjusting piston.
An adjusting device for adjusting a swash plate of an axial piston machine comprising:
- an adjusting piston, a first end of the adjusting piston connected to the swash plate of the axial piston machine via an adjusting lever, a second end of the adjusting piston positioned opposite the first end and adjacent a control piston,
- a regulator adjusts an adjusting pressure acting on the adjusting piston in dependence on a control force acting on the control piston of the regulator,
- a feedback spring connecting the adjusting piston and the control piston, and
- a pot-shaped recess forming a hydraulic control volume and housing the feedback spring, the pot-shaped recess comprising a bottom and a lateral wall extending along a central axis of the control piston, the pot-shaped recess being hollow and having an open end to form a hydraulic control volume within the control piston, and the feedback spring extending through the hydraulic control volume from the bottom of the pot-shaped recess, along the lateral wall, to the adjusting piston,
- wherein the second end of the adjusting piston comprises an adjusting piston face shaped with an extension which receives the feedback spring, and the extension extends into the pot-shaped recess in a first position.
A method of adjusting a swash plate of an axial piston machine comprising:
- connecting a first end of an adjusting piston to the swash plate of the axial piston machine via an adjusting lever such that a second end of the adjusting piston is positioned opposite the first end and adjacent a control piston,
- adjusting pressure acting on the adjusting piston via a regulator in dependence on a control force acting on the control piston of the regulator, and
- connecting the adjusting piston and the control piston via a feedback spring such that the feedback spring extends through a pot-shaped recess, the pot-shaped recess formed within a hollow interior of the control piston and having an open end to form a hydraulic control volume within the control piston, and the feedback spring extending through the hydraulic control volume from the adjusting piston to a second end of the control piston opposite the adjusting piston.
Dependencies are inferred from the claim text.