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US 6,494,127 B1Granted
Radial piston engine with guide rollers
AssigneeMannesmann Rexroth GmbH
InventorSinclair Cunningham
Life of this patent
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AssigneeMannesmann Rexroth GmbH
InventorSinclair Cunningham
Estimating the term…
The invention concerns a technically optimized radial piston engine comprising a cam ring and a cylinder block arranged so as to rotate about an axis of rotation relative to the cam ring and having a plurality of cylinders oriented in the radial direction of the cylinder block. A piston capable of being radially displaced is located in each cylinder, resting on the cam ring via a roller. Said roller is mounted on the piston so as to rotate about an axis parallel to that of the cylinder block and rests axially, relative to its axis of rotation in the cylinder, against roller guides arranged on its surfaces. Said radial piston engine is characterized in that the roller guides are integrally mobile with the roller associated with them, in the piston stroke direction, and thereby driven by the roller both when the piston performs a loaded stroke and an idle stroke, without any contact occurring between the roller guides and the cam ring. The pistons are rotationally fixed by a torsional stop which is separate from the roller guide.
A radial piston engine (2) with a cam ring (8), a cylinder block (18) disposed to rotate relative to the cam ring (8) around an axis of rotation (16), the said block having a plurality of cylinders (36) aligned in radial direction of the cylinder block (18), in each of which cylinders there is accommodated a slidable piston (44), which is braced via a roller (54, 96, 100) against the cam ring, wherein the roller is mounted on the piston to rotate around an axis of rotation (58) parallel to the axis of rotation (16) of the cylinder block (18) and, relative to its axis of rotation (58), is braced axially in the cylinder (36) via roller guides (60, 90, 92, 94, 98) disposed at its end faces, characterized in that the roller guides (60, 90, 92, 94, 98) are rigidly connected to the respective roller (54, 96, 100) with respect to sliding in piston displacement direction.
A radial piston engine (2), especially according to one of the preceding claims, with a cam ring (8), a cylinder block (18) disposed to rotate relative to the cam ring around an axis of rotation (16), the said block having a plurality of cylinders (36) aligned in radial direction of the cylinder block, in each of which cylinders there is accommodated a slidable piston (44), which is braced via a roller (54, 96, 100) against the cam ring, wherein the roller is mounted on the piston to rotate around an axis of rotation (58) parallel to the axis of rotation (16) of the cylinder block (18) and, relative to its axis of rotation (58), is braced axially in the cylinder via roller guides (60, 90, 92, 94, 98) disposed at its end faces, characterized by an antirotation device (50), disposed separately from the roller guides, to prevent turning of the piston in the cylinder.
Dependencies are inferred from the claim text.