Axial piston machine with curved bearing surface on the drive plate
First Claim
1. An axial piston machine with a plurality of reciprocating pistons, each of which can move longitudinally in a cylinder bore and is supported on a bearing surface of a drive plate, whereby the drive plate is oriented so that it forms a tilt angle with a transverse plane that is perpendicular to the axis of rotation of the axial piston machine, wherein the bearing surface is provided with a concave curvature when viewed in the direction of the longitudinal center plane of the axial piston machine, at least in the vicinity of the reciprocating piston that extends farthest out of the cylinder bores, wherein the curvature of the bearing surface provides that the surface pressure of the reciprocating pistons in the cylinder bores that occur during operation differ from each other by not more than 20%.
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Accused Products
Abstract
An axial piston machine includes a plurality of reciprocating pistons, each of which can move longitudinally in a cylinder bore and is supported on a bearing surface of a drive plate. The drive plate is oriented so that it forms a tilt angle with respect to a transverse plane that is perpendicular to the axis of rotation of the axial piston machine. The bearing surface, viewed in the direction of the longitudinal center plane of the axial piston machine, is provided at least in the vicinity of the reciprocating piston that extends the farthest out of the cylinder bores with a concave, in particular spherical, curvature. As a result, taking advantage of the allowable material loads at a constant maximum allowable transverse force on the piston, the tilt angle of the drive plate (1) can be increased. Consequently, the geometric volume flow of the axial piston machine and thus its delivery can also be increased. The curvature of the bearing surface is designed so that the surface pressures of the reciprocating pistons in the cylinder bores and/or the deflections of the reciprocating pistons that occur during operation differ from each another by not more than 20%. The tilt angle of the drive plate is between 20 and 30 degrees.
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Citations
20 Claims
- 1. An axial piston machine with a plurality of reciprocating pistons, each of which can move longitudinally in a cylinder bore and is supported on a bearing surface of a drive plate, whereby the drive plate is oriented so that it forms a tilt angle with a transverse plane that is perpendicular to the axis of rotation of the axial piston machine, wherein the bearing surface is provided with a concave curvature when viewed in the direction of the longitudinal center plane of the axial piston machine, at least in the vicinity of the reciprocating piston that extends farthest out of the cylinder bores, wherein the curvature of the bearing surface provides that the surface pressure of the reciprocating pistons in the cylinder bores that occur during operation differ from each other by not more than 20%.
- 4. An axial piston machine with a plurality of reciprocating pistons, each of which can move longitudinally in a cylinder bore and is supported on a bearing surface of a drive plate, whereby the drive plate is oriented so that it forms a tilt angle with a transverse plane that is perpendicular to the axis of rotation of the axial piston machine, wherein the bearing surface is provided with a concave curvature when viewed in the direction of the longitudinal center plane of the axial piston machine, at least in the vicinity of the reciprocating piston that extends farthest out of the cylinder bores, wherein the curvature of the bearing surface provides that the deflections of the reciprocating pistons in the cylinder bores that occur during operation differ from each other by not more than 20%.
- 7. An axial piston machine with a plurality of reciprocating pistons, each of which can move longitudinally in a cylinder bore and is supported on a bearing surface of a drive plate, whereby the drive plate is oriented so that it forms a tilt angle with a transverse plane that is perpendicular to the axis of rotation of the axial piston machine, wherein the bearing surface is provided with a concave curvature when viewed in the direction of the longitudinal center plane of the axial piston machine, at least in the vicinity of the reciprocating piston that extends farthest out of the cylinder bores, wherein the reciprocating pistons are supported on the bearing surface of the drive plate by slippers having slide faces, and the slide faces of the slippers facing the drive plate have a convex curvature.
Specification