Control mechanism for a tridimensional cam
AssigneeSnecma
InventorsGuy d'Agostino, Andre Dhainaut, Claude M. J. Maillard
Life of this patent
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Abstract
A cylinder (3) is positioned to rotate on a fixed axle (1) in such a way that several leakproof chambers (3B, 3D) are formed: a second, longer cylinder (4) is positioned to slide along the first (3) and to turn on the fixed axle (1) in such a way that several leakproof chambers are formed (4A, 4B). Communicating pressurized fluids into the various chambers makes the cylinders (3, 4) turn a distance proportionate to a value x, and can make the second cylinder move axially along the first cylinder a distance proportionate to another value y; these values x and y being derived from several variables and sensors (10a to 10d) "read" the surface contours of the second cylinder (4), representing, for example, a function f (x,y).
Claims8
A control mechanism for a tridimensional cam comprising:
- a substantially cylindrical tridimensional cam embodied by contours of an approximately cylindrical surface;
- a fixed central rod;
- a linear jack supporting said tridimensional cam and mounted on said central rod for rotational and translational movement thereon;
- a rotating jack disposed within the body of said linear jack, said rotating jack being rotatably mounted on said central rod and mounted against translation thereon, said linear jack being mounted for translation along said rotating jack, wherein said rotating jack further comprises fluid piston means for producing said translation of said linear jack;
- a key and a groove for fixing said rotating jack and said linear jack against relative rotation;
- an even number of rotary control chambers disposed between said rotating jack and said central rod, said rotary control chambers being formed in part by a plurality of radial partitions equal in number to the number of said rotary control chambers, wherein said rotary control chambers further comprise means for rotationally driving said rotating jack;
- means for supplying fluid to said fluid piston means,
- means for supplying fluid to said rotary control chambers, and
- control means for independently controlling said means for supplying fluid to said fluid piston means and said means for supplying fluid to said rotary control chambers.
Dependencies are inferred from the claim text.