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US 5,280,745 AGranted
Radial-pluger-type apparatus with variable plunger stroke
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorFujiya Maruno
Life of this patent
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Abstract
A variable-stroke radial-plunger-type apparatus for use as an air compressor, for example, has a main shaft rotatably disposed in a casing assembly, an eccentric collar angularly movably mounted on a eccentric crankpin of the main shaft, and a coupling ring angularly movably mounted on the eccentric collar. A plurality of radial plungers with inner ends coupled to the coupling ring are slidably fitted in respective cylinders that are rockably supported it the casing assembly. The angular movement of the eccentric collar on the crankpin is adjusted by a stroke adjusting mechanism. The coupling ring can be positioned with respect to the main shaft and the casing assembly by a W-mechanism. The W-mechanism may comprise external and internal gears or pulleys and sprockets.
Claims25
A radial-plunger-type apparatus comprising:
- a casing assembly;
- a main shaft relatively rotatably disposed in said casing assembly for rotation about a first axis and having a crankpin radially displaced off said first axis;
- an eccentric collar angularly movably mounted on said crankpin and having an outer circumferential surface eccentric with respect to said crankpin;
- a coupling ring angularly movably mounted on said outer circumferential surface of said eccentric collar;
- a plunger extending radially outwardly and having a radially inner end pivotally supported on said coupling ring;
- a cylinder having a cylinder bore, said plunger being slidably fitted in said cylinder bore through a radially inner end thereof, said cylinder being rockably attached to said casing assembly;
- a stroke adjusting mechanism for adjusting the angular movement of said eccentric collar on said crankpin;
- and
- a W-mechanism for causing said coupling ring to revolve around said main shaft and preventing said coupling ring from rotating about its own axis when said main shaft is rotated with respect to said casing assembly.
6 more elements
A radial-plunger-type apparatus comprising:
- a casing assembly;
- a main shaft relatively rotatably disposed in said casing assembly for rotation about a first axis and having a crankpin radially displaced off said first axis;
- an eccentric collar angularly movably mounted on said crankpin and having an outer circumferential surface eccentric with respect to said crankpin;
- a coupling ring angularly movably mounted on said outer circumferential surface of said eccentric collar;
- a plunger extending radially outwardly and having a radially inner end pivotally supported on said coupling ring;
- a cylinder having a cylinder bore, said plunger being slidably fitted in said cylinder bore through a radially inner end thereof, said cylinder being rockably attached to said casing assembly;
- a stroke adjusting mechanism for adjusting the angular movement of said eccentric collar on said crankpin;
- and
- a W-mechanism for allowing said coupling ring to revolve around said main shaft without rotation about its own axis;
- wherein said W-mechanism has a first internal gear coupled to said casing assembly concentrically with said main shaft, an external gear rotatably mounted on said main shaft for rotation about said crankpin and held in mesh with said first internal gear, and a second internal gear disposed concentrically with said coupling ring for rotation in unison therewith and held in mesh with said external gear, said first and second internal gears having the same number of gear teeth, said external gear having a number of gear teeth which is smaller than the number of gear teeth of said first and second internal gears.
7 more elements
A radial-plunger-type apparatus comprising:
- a casing assembly;
- a main shaft relatively rotatably disposed in said casing assembly for rotation about a first axis and having a crankpin radially displaced off said first axis;
- an eccentric collar angularly movably mounted on said crankpin and having an outer circumferential surface eccentric with respect to said crankpin;
- a coupling ring angularly movably mounted on said outer circumferential surface of said eccentric collar;
- a plunger extending radially outwardly and having a radially inner end pivotally supported on said coupling ring;
- a cylinder having a cylinder bore, said plunger being slidably fitted in said cylinder bore through a radially inner end thereof, said cylinder being rockably attached to said casing assembly;
- a stroke adjusting mechanism for adjusting the angular movement of said eccentric collar on said crankpin;
- and
- a W-mechanism for allowing said coupling ring to revolve around said main shaft without rotation about its own axis;
- wherein said cylinder is rockable about a second axis with respect to said casing assembly, said plunger is angularly movable about a third axis with respect to said coupling ring, and said third axis is revolvable around a fourth axis in response to rotation of said main shaft, and wherein when the angular movement of said eccentric collar is adjusted by said stroke adjusting mechanism to maximize a reciprocating stroke of said plunger in said cylinder bore, said second axis is angularly spaced by a predetermined angle in a circumferential direction of the casing around said first axis from a reference plane which extends through said first axis and said fourth axis.
7 more elements
Dependencies are inferred from the claim text.