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AssigneeSettima Meccanica S.r.l.
InventorMANUELE ROSSI
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The invention relates to a bi-helical toothed wheel (1) with non-encapsulating profile (4) for hydraulic gear apparatuses (2), of the type bound to a support shaft (5) to form a driving or driven wheel of said hydraulic apparatus and comprising a plurality of teeth (6) extended with variable helix angle with continuous function in the longitudinal direction, wherein the teeth profile (4) keeps a shape continuity in each cross section thereof. More particularly, each tooth of the toothed wheel is longitudinally split in three zones: initial (A), central (B) and terminal (C) zones, and the central zone (B) has a variable helix angle, while the initial (A) and terminal (c) zones have a constant helix angle. The invention allows to manufacture contra-rotating rotors, having a non-encapsulating profile and a helix shape such as to suppress the angular point at the center of the rotors themselves and therefore all the problems related to their machining.
A bi-helical toothed wheel with non-encapsulating profile for hydraulic gear apparatuses, said bi-helical toothed wheel being bound to a support shaft to form a driving or driven wheel of said hydraulic apparatus and comprising a plurality of teeth extended with variable helix angle with continuous function in the longitudinal or axial tooth direction, wherein the teeth profile keeps a shape continuity in each cross section thereof.
A method for manufacturing a bi-helical toothed wheel with non-encapsulating profile, for hydraulic gear apparatuses, by means of an automatic numerically controlled machine powered by a specific software derived from a 3D construction of the bi-helical development model of the wheel tooth, wherein the helix development is curved in a continuous manner or in a single central segment along the longitudinal direction of the tooth while keeping the shape continuity of the cross section thereof.
Dependencies are inferred from the claim text.