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US 4,235,116 AGranted
Balanced variable wobble plate drive
AssigneeU.S. Philips Corporation
InventorsRoelf J. Meijer, Albertus P. J. Michels
Life of this patent
Estimating the term…
Abstract
A wobble plate drive mechanism for machines having axial pistons or the like clustered about a shaft. The moving parts are dynamically balanced over a range of wobble plate tilt angles by a balance ring arranged outboard of the wobble plate. The wobble plate restraint has balanced gimbal rings.
Claims10
A balanced variable displacement drive mechanism for a cluster of axially reciprocating members comprising:
- a shaft having an axis,
- means for mounting the shaft for rotation about the shaft axis,
- a wobble plate having means for defining a driving plane,
- a swashplate having an axis perpendicular to said driving plane,
- bearing means so connecting said wobble plate to said swashplate that the driving plane is maintained perpendicular to the swashplate axis,
- means for mounting the swashplate to the shaft for rotation therewith about the shaft axis, and for control movement with respect to the shaft, said control movement tilting the driving plane about a tilt axis perpendicular to and intersecting the shaft axis,
- means for restraining the wobble plate from rotation about the shaft axis,
- at least three reciprocating member assemblies;
- each assembly comprising a member, means for mounting the member for reciprocating motion in an axial direction parallel to said shaft axis, and means for connecting the member to the wobble plate for reciprocating motion in response to shaft rotation as a function of the angle of tilt of the driving plane, and
- a circular symmetrical balancing ring connected to said swashplate for movement therewith, spaced outward from said wobble plate and intersected by the driving plane;
- the swashplate and balancing ring together having a combined mass so arranged that the center of gravity of said mass lies in said driving plane, and centrifugal forces on the mass counterbalance other oscillating inertia forces.
8 more elements
A balanced drive mechanism for a multi-cylinder axial piston machine comprising:
- a machine frame,
- a shaft having an axis,
- means for mounting the shaft in the frame for rotation about said axis,
- a swashplate mounted on and rotating with said shaft,
- at least three cylinders mounted to said frame and having axes parallel to said shaft axis, equally spaced from said shaft axis and from each other,
- at least three pistons disposed in respective cylinders,
- a wobble plate mounted by bearing means on said swashplate, said bearing means defining a swashplate axis, said wobble plate arranged to define a driving plane having a tilt angle about a tilt axis, and
- means for restraining the wobble plate from rotation about said shaft axis, comprising a constant velocity joint coupling the wobble plate to the machine frame, said constant velocity joint having at least one dynamically balanced section.
5 more elements
Dependencies are inferred from the claim text.