Patent ID: 7299738
Filing Date: 2007-11-27
Classification: F04B

Abstract:
1. Axial piston machine having a swashplate or oblique axis which can be adjusted by means of servopistons and has a valve segment and an adjustment unit for the electrically proportional adjustment of the volumetric displacement, the adjustment unit comprising proportional magnets ( 12 , 12 ′) which can be activated electrically, and a control piston ( 2 ) for controlling the oil pressure which moves the servopistons, the proportional magnets ( 12 , 12 ′) acting on the control piston ( 2 ) along a common tappet axis, and a feedback device for feeding back the current swashplate or oblique-axis valve-segment position to the control piston ( 2 ) being provided, and the feedback device comprising spring levers ( 6 , 6 ′) which can pivot about an axis ( 5 ), the spring levers ( 6 , 6 ′) each being mounted on the pivot axis ( 5 ) with a bearing shell ( 15 ), which are each composed of two component shells which support the spring lever ( 6 , 6 ′) at separate locations on the pivot axis ( 5 ), and which each essentially enclose a half-space about the pivot axis ( 5 ); wherein the feedback device further comprises a pointer ( 3 ) which is embodied as a two-armed lever and which can pivot about the pivot axis ( 5 ), the pointer ( 3 ) engaging in the control piston ( 2 ) on one side of the pivot axis ( 5 ), and between the spring lever ( 6 , 6 ′) on the other side; and wherein the pointer ( 3 ) is mounted on the spring levers ( 6 , 6 ′).