Axial piston pump
AssigneeContelec AG
InventorsMeric Amstutz, Rolf Bachmann
Life of this patent
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Abstract
An axial piston pump having several pistons has a magnetic encoder (5), which is arranged on a swash plate, and a magnetic field sensor, which is arranged in such a way that it faces towards the magnetic encoder (5). The magnetic encoder (5) has at least two permanent magnets (2, 3) and a plate (4) which consists of a ferromagnetic material. The permanent magnets (2, 3) are arranged on the plate (4) in such a way that they each faces a magnetic pole towards the plate (4), and this pole is at least partially covered by the plate (4) in each case.
Claims18
An axial piston pump (6) having several pistons (64), having a magnetic encoder (5) arranged on a swash plate (65), and a magnetic field sensor (7) which is arranged in such a way that it faces towards the magnetic encoder (5), characterised in that the magnetic encoder (5) has exactly two separate permanent magnets (2, 3) and a plate (4), which consists of a ferromagnetic material, wherein the two separate permanent magnets (2, 3) are arranged on the plate (4) in such a way that they are spaced apart from one another and where each face only one magnetic pole (21, 31) towards the plate (4), and each pole (21, 31) is at least partially covered by the plate (4) in each case, and where all surfaces of the two separate permanent magnets (2, 3) which do not contact the plate are surrounded by at least one non-ferromagnetic material and where the magnetic encoder (5) has a housing (1) made of a non-ferromagnetic material which has two recesses (121, 122) covered by the plate (4) in which the two separate permanent magnets (2, 3) are arranged.
An axial piston pump (6) having several pistons (64), having a magnetic encoder (5) arranged on a swash plate (65), and a magnetic field sensor (7) which is arranged in such a way that it faces towards the magnetic encoder (5), characterised in that the magnetic encoder (5) has at least two separate permanent magnets (2, 3) and a plate (4), which consists of a ferromagnetic material, wherein the at least two separate permanent magnets (2, 3) are arranged on the plate (4) in such a way that they are spaced apart from one another and where the at least two separate permanent magnets each face only one magnetic pole (21, 31) towards the plate (4), and each pole (21, 31) is at least partially covered by the plate (4) in each case, and where all surfaces of the at least two separate permanent magnets (2, 3) that do not face the plate (2, 3) do not contact magnetic material.
An axial piston pump (6) having several pistons (64), having a magnetic encoder (5) arranged on a swash plate (65), and a magnetic field sensor (7) which is arranged in such a way that it faces towards the magnetic encoder (5), characterised in that the magnetic encoder (5) has exactly two separate permanent magnets (2, 3) and a plate (4), which consists of a ferromagnetic material, wherein the two separate permanent magnets (2, 3) are arranged on the plate (4) in such a way that they are spaced apart from one another and where each face only one magnetic pole (21, 31) towards the plate (4), and each pole (21, 31) is at least partially covered by the plate (4) in each case and where the magnetic encoder (5) has a housing (1) made of a non-ferromagnetic material, which has two recesses (121, 122) in which the two separate permanent magnets (2, 3) are arranged, wherein the recesses (121, 122) are covered by the plate (4).
Dependencies are inferred from the claim text.