Patent ID: 8350652
Filing Date: 2013-01-08
Classification: F01L,H01F,Y10T

Abstract:
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.