Piston for an axial-piston engine of the inclined-axis type and process for manufacturing such pistons
AssigneeBrueninghaus Hydromatik GmbH
InventorRolf Brockerhoff
Life of this patent
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Abstract
A piston (2) for a piston engine, in particular for an axial-piston engine (1) of the inclined-axis type, comprises a conical section (26), a neck region (19) and a ball end (9) which is formed onto said neck region (19), a clearance (15) which is constructed in the piston and a pin (14) which is constructed in said clearance (15). The wall (20) of the piston (2) has different thicknesses of material in different sections of its axial length.
Claims22
Piston for an axial-piston engine of the inclined-axis type, said piston comprising a conical section, a neck region and a ball end which is formed onto said neck region, a clearance which is constructed in the piston, and a pin which is constructed in said clearance,
- wherein the wall of the piston has different thicknesses of material in different sections of its axial length,
- wherein a radial diameter of the clearance decreases towards the base of the piston;
- wherein the clearance is closed off, in the neck region, by the abutment of an inner face of the wall of said clearance against the pin;
- wherein at least one bore is constructed in the neck region;
- and
- wherein the clearance is fillable with a hydraulic fluid though the at least one bore.
Process for manufacturing a piston for an axial-piston engine of the inclined-axis type, wherein said piston comprises a conical section, a neck region and a ball end which is formed onto said neck region, a clearance which is constructed in the piston and a pin which is constructed in said clearance, and wherein the wall of the piston has a different thicknesses of material in different sections of its axial length,
- wherein said process comprises the following steps:
- a) the trimming of round stock to the desired length;
- b) the manufacture of an internal contour by cold extrusion;
- c) the preparation of the external contour by rough-turning;
- d) the manufacture of the external contour by round swaging;
- and
- c) finishing.
Piston for an axial-piston engine of the inclined-axis type, said piston comprising an elongate conical section, a neck region formed at the narrower diameter end of said elongate conical section, a ball end having a cavity provided therein, said ball end being formed onto said neck region, a clearance which is constructed in the piston, and a pin which is constructed to extend in said clearance,
- wherein the wall of the piston formed by said clearance has different thicknesses of material in different sections of its axial length, the thickness of the material of the wall of the piston in the region of the cavity in the ball end being greater than the wall thickness in the elongate conical section.
Dependencies are inferred from the claim text.