Machine element or mechanism – Mechanical movements – Rotary to or from reciprocating or oscillating
Patent
1986-02-26
1988-08-23
Dorner, Kenneth J.
Machine element or mechanism
Mechanical movements
Rotary to or from reciprocating or oscillating
92 71, 91502, 417269, F16H 2300
Patent
active
047651946
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
(1) Field of the Invention
This invention relates to a piston-operated machine.
SUMMARY OF THE PRESENT INVENTION
The general object of the invention is to provide a piston-operated machine which may, with appropriate modifications, be used as an internal combustion or external combustion motor, or as a pump or compressor, and which is particularly efficient and smooth-running in operation.
Broadly, the invention resides in a piston-operated machine including a crank shaft having an intermediate crank section the axis of the crank section being oblique to the axis of the crank shaft and the crank section passing rotatably and centrally through a wobble plate, the centre of the wobble plate lying on a prolongation of the axis of the crank shaft; a plurality of cylinders, their axes parallel to and equally spaced from the axis of the crank shaft; a piston in each cylinder mounted on a piston rod extending coaxially from the cylinder to a respective connection on the wobble plate spaced from its centre; each piston rod, at its said connection, being rotatably but non-slidably engaged in a member eccentrically rotatable, about an axis parallel to the axis of the crank shaft, in a thrust plate mounted for rotation, about the same axis, in a wobble plate.
Preferably each cylinder is paired with another to the opposite side of the wobble plate, the pistons of the two paired cylinders being fixed to opposite ends of a common piston rod; and means are provided for restraining the piston rods from rotational movement.
Other preferred features of the invention will become apparent from the following description.
BRIEF DESCRIPTION OF THE DRAWINGS
In order that the invention may be readily understood, reference is now made to the accompanying drawings showing, more or less diagrammatically, preferred embodiments of the invention, wherein:
FIG. 1 is a partly broken-away side elevation of the machine;
FIG. 2 is a sectional view taken along line 2--2 in FIG. 1;
FIG. 3 is a sectional view taken along line 3--3 in FIG. 2;
FIG. 4 is a sectional view, to larger scale, of a piston of the machine;
FIG. 5 is a part sectional side view of an alternative embodiment of the wobble plate where a gear walks around a fixed ring to prevent rotation of the wobble plate;
FIG. 6 is a sectional side view of an alternative embodiment of connecting the piston rods to the wobble plate;
FIG. 7 is a schematic view of the valve gear, ignition system and fuel injection for an embodiment of the invention operating as a four-stroke internal combustion engine.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The machine illustrated in FIGS. 1 to 4 includes an engine block 10 with a cluster of cylinders 11 at both sides of a central crank chamber 12. In the embodiment illustrated, each cluster comprises six cylinders 11 is equidistantly spaced arrangement, their axes parallel to and equidistant from a crank shaft 13 rotatable in any suitable bearings (not shown), corresponding cylinders of the two clusters being coaxially aligned as pairs.
Within the crank chamber 12 is intermediate crank section 14 an which may be formed integrally with the crank shaft 13, or alternatively its cheeks 15 and 15a may be fixedly mounted on the inner ends of the two coaxially aligned end portions of the shaft. The axis of the crank section 14 is at an angle to, and centrally intersected by, a prolongation of the axis of the crank shaft.
The crank section 14 is rotatable in bearings 16 in opposed hub bosses 17 of a coaxial wobble plate 18 which is circular but because of its angular disposition appears elliptical in end view, as shown in FIG. 2.
In each of the cylinders is a piston 19, the two pistons of each pair of opposed cylinders 11 of the two clusters being fixed coaxially on the ends of a common piston rod 20 slidable through bearings 21 at the inner ends of the cylinders 11. Each of the piston rods 20 has its central part fixed rotatably but non-slidably within a thrust block 22 mounted in the wobble plate 18. The thrust block
REFERENCES:
patent: 2303838 (1943-12-01), Hall
patent: 2335415 (1943-11-01), Holmes
patent: 2387908 (1945-10-01), Howard
Anderson Gerald A.
Dorner Kenneth J.
Van Meegan Constructions Pty. Ltd.
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