Electromagnetic actuating unit for a hydraulic directional control valve and method for the assembly thereof
First Claim
1. An electromagnetic actuating unit for a hydraulic directional control valve, comprising:
- a housing for conducting a magnetic flux;
a coil for generating a magnetic field in the housing;
a yoke unit having a yoke in the coil, a yoke plate axially adjacent the coil and a first bearing point;
a pole core unit having a pole core in the coil and a second bearing point;
an armature unit arranged in the coil having an armature and a pressure pin acting as an actuator, the armature unit is mounted, so as to be slidable in a direction of a longitudinal axis, in the first bearing point and in the second bearing point;
wherein, in a first assembly state of the actuating unit, at least one of the first bearing point or the second bearing point is radially movable and, in a second assembly state, after a coaxial alignment of the first bearing point and the second bearing point, at least one of the first bearing point and the second bearing point is fixed; and
a centering sleeve arranged in the coil, the centering sleeve servers for a radial alignment of the first bearing point and the second bearing point during assembly.
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Accused Products
Abstract
An electromagnetic actuating unit for a hydraulic directional control valve and a method for the assembly thereof. The actuating unit has a coil for generating a magnetic field, a yoke unit with a yoke and a yoke plate, and a pole core unit with a pole core and a housing for conducting a magnetic flux, and an armature unit which is arranged in the magnetic field of the coil and has an armature and a pressure pin as an actuator. The armature unit can be displaced in the direction of the longitudinal axis thereof in a first bearing point in the yoke unit and in a second bearing point in the pole core unit. At least one of the hearing points can be displaced in the radial direction during assembly of the actuating unit and can be fixed after a coaxial orientation of both bearing points.
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Citations
11 Claims
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1. An electromagnetic actuating unit for a hydraulic directional control valve, comprising:
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a housing for conducting a magnetic flux; a coil for generating a magnetic field in the housing; a yoke unit having a yoke in the coil, a yoke plate axially adjacent the coil and a first bearing point; a pole core unit having a pole core in the coil and a second bearing point; an armature unit arranged in the coil having an armature and a pressure pin acting as an actuator, the armature unit is mounted, so as to be slidable in a direction of a longitudinal axis, in the first bearing point and in the second bearing point; wherein, in a first assembly state of the actuating unit, at least one of the first bearing point or the second bearing point is radially movable and, in a second assembly state, after a coaxial alignment of the first bearing point and the second bearing point, at least one of the first bearing point and the second bearing point is fixed; and a centering sleeve arranged in the coil, the centering sleeve servers for a radial alignment of the first bearing point and the second bearing point during assembly. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for the assembly of an electromagnetic actuating unit for a hydraulic directional control valve, comprising the following steps:
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a, assembling a yoke unit, an armature unit, a pole core unit and a coil with at least one of two bearing points being floatingly mounted in the yoke unit or in the pole core unit; b. coaxially aligning of the two bearing points with at least one of the two bearing points being radially movable While the two bearing points are being aligned; and c. fixing the bearing point, which is floatingly mounted, wherein the coaxially aligning of the bearing points takes place by insertion of the yoke unit and of the pole core unit into a centering sleeve arranged in an interior of the coil. - View Dependent Claims (8, 9, 10, 11)
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Specification