Displacement control with angle sensor adjustment
AssigneeDanfoss Power Solutions II Technology A/S
InventorsAnil Balasaheb Kharpas, Nirmaljeet Kulvindarsingh Johal, Sanjay Dhondappa Mali, Avinash Dadaso Patil, Richard Randel Lyman, Matthew Edward Creswick
Life of this patent
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Abstract
Control systems and feedback assemblies for hydraulic axial displacement machines, such as pumps and motors. The control systems and feedback assemblies can have enhanced adjustability. An angle sensor for sensing the angular position of a pivot arm can have a housing, and the housing can be angularly adjustable about the pivot axis relative to the pivot arm.
Claims18
A control system for controlling an angular position of a swashplate of an axial piston hydraulic pump or motor, the angular position of the swashplate being determined by a servo-piston, the control system comprising:
- a valve arrangement for providing a charge pressure to the servo-piston which causes the servo-piston to alter the angular position of the swashplate;
- a pivot arm configured to pivot about a pivot axis in concert with movement of the servo- piston, wherein an angular position of the pivot arm is indicative of the angular position of the swashplate, and wherein the pivot axis is adjustable in position with respect to a valve member of the valve arrangement and the servo-piston;
- a spring for transferring a spring load between the pivot arm and the valve member of the valve arrangement;
- an angle sensor for sensing the angular position of the pivot arm, a housing of the angle sensor being configured to be angularly adjusted about the pivot axis relative to the pivot arm to angularly adjust a position of internal sensing components of the angle sensor about the pivot axis relative to the pivot arm;
- and
- a pivot shaft coupled to the pivot arm, the pivot shaft defining the pivot axis and being adapted to pivot in concert with the pivot arm about the pivot axis, the control system also including a pivot axis adjustment sleeve in which the pivot shaft is rotatably mounted, the pivot axis adjustment sleeve being mounted within a receptacle defined by a housing of the valve arrangement, the pivot shaft being eccentric with respect to the pivot axis adjustment sleeve such that rotation of the pivot axis adjustment sleeve about its center axis relative to the housing of the valve arrangement adjusts the position of the pivot axis with respect to the valve arrangement and the servo-piston.
A control system for controlling an angular position of a swashplate of an axial piston hydraulic pump or motor, the angular position of the swashplate being determined by a servo-piston, the control system comprising:
- a valve arrangement for providing a charge pressure to the servo-piston which causes the servo-piston to alter the angular position of the swashplate;
- a pivot arm configured to pivot about a pivot axis in concert with movement of the servo- piston, wherein an angular position of the pivot arm is indicative of the angular position of the swashplate, and wherein the pivot axis is adjustable in position with respect to a valve member of the valve arrangement and the servo-piston;
- a spring for transferring a spring load between the pivot arm and the valve member of the valve arrangement;
- and
- a pivot shaft coupled to the pivot arm, the pivot shaft defining the pivot axis and being adapted to pivot in concert with the pivot arm about the pivot axis, the control system also including a pivot axis adjustment sleeve in which the pivot shaft is rotatably mounted, the pivot axis adjustment sleeve being mounted within a receptacle defined by a housing of the valve arrangement, the pivot shaft being eccentric with respect to the pivot axis adjustment sleeve such that rotation of the pivot axis adjustment sleeve about its center axis relative to the housing of the valve arrangement adjusts the position of the pivot axis with respect to the valve arrangement and the servo-piston.
A control system for controlling an angular position of a swashplate of an axial piston hydraulic pump or motor, the angular position of the swashplate being determined by a servo-piston, the control system comprising:
- a valve arrangement for providing a charge pressure to the servo-piston which causes the servo-piston to alter the angular position of the swashplate;
- a pivot arm configured to pivot about a pivot axis in concert with movement of the servo-piston, wherein an angular position of the pivot arm is indicative of the angular position of the swashplate;
- a spring for transferring a spring load between the pivot arm and a valve member of the valve arrangement;
- and
- an angle sensor for sensing the angular position of the pivot arm, a housing of the angle sensor including slots configured to receive fasteners that secure the housing, the slots being curved to allow the housing to be angularly adjusted about the pivot axis relative to the pivot arm to angularly adjust a position of internal sensing components of the angle sensor about the pivot axis relative to the pivot arm.
Dependencies are inferred from the claim text.