Patent ID: 11933283
Assignee: DANFOSS POWER SOLUTIONS GMBH & CO. OHG
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A manual displacement control device for variable displacement hydraulic units equipped with a servo unit capable of operating a displacement element in order to set a displacement volume, the control device comprising:
an input shaft mounted rotatable about an input shaft axis in an input shaft block and protruding from the input shaft block with a first end on which a rotating torque is configured to be applied;
a control spool housed in a control housing and moveable by means of rotation of the input shaft for controlling a servo pressure which is configured to be guided to and from a servo unit;
a feedback transmitting element pivotable about a feedback pivot axis parallel to the input shaft axis, having a first end portion for interacting with the control spool, and a second end portion for receiving a mechanical feedback signal of a feedback element connected to a displacement element of a hydraulic unit;
positioning means for adjusting and fixing a lateral position of the input shaft with respect to the control housing in a direction perpendicular to the input shaft axis and perpendicular to the direction of a centering force exerted on the input shaft by a centering mechanism in order to restore the input shaft to a zero position when no rotating torque is applied to the first end of the input shaft;
wherein inclined surfaces are formed on opposite sides of the input shaft block such that wedge surfaces of parts of the positioning means having through holes are pressed by means of fixation bolts on the inclined surfaces to fix the input shaft block on the control housing.