US 11,990,275 B2
Electromagnetic actuator device and use of such a device
Michael Feindler, Stockach (DE); and Marcin Nieweglowski, Wroclaw (PL)
Assigned to ETO Magnetic GmbH, Stockach (DE)
Appl. No. 16/756,906
Filed by ETO Magnetic GmbH, Stockach (DE)
PCT Filed Sep. 13, 2018, PCT No. PCT/EP2018/074696
§ 371(c)(1), (2) Date Apr. 17, 2020,
PCT Pub. No. WO2019/076549, PCT Pub. Date Apr. 25, 2019.
Claims priority of application No. 10 2017 124 485.9 (DE), filed on Oct. 19, 2017.
Prior Publication US 2021/0202146 A1, Jul. 1, 2021
Int. Cl. F16K 31/06 (2006.01); H01F 7/16 (2006.01); F16K 11/07 (2006.01)
CPC H01F 7/1607 (2013.01) [F16K 31/0675 (2013.01); F16K 31/0693 (2013.01); F16K 11/0716 (2013.01); F16K 31/0603 (2013.01); H01F 2007/1661 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An electromagnetic actuator device having armature means (18) which, as a reaction to stationary coil means (12) being energized, is movable in an actuator housing (10) along an axial direction relative to stationary core means (14),
and which contact axially elongated plunger means (20) guided in a core passage (50) of the core means (14) in such a manner that a movement of the armature means (18) in the direction of the core means (14) can entrain the plunger means (20),
an end section (26) of the plunger means (20), axially opposite the armature means (18), being realized for interacting with or realizing a control partner, wherein the plunger means comprise an elongated rod section (34) and a disk-shaped end section (30) having a widened diameter and the disk-shaped end section (30) sitting on the elongated rod section as one piece on an end side in the direction of the armature means (18),
an axial extension (W) of the disk-shaped end section (30) determining a minimum distance between the armature means and the core means in an abutment state of the armature means on an end surface and/or front surface of the core means facing the armature means,
wherein the plunger means (20) are made of a polymer material using an injection molding process,
wherein the elongated rod section (34) has a recess facing the core means, the recess being realized as a longitudinal groove (36, 38) in such a manner that a pressure equalization can be realized between an armature space (40) which is defined by the armature means (18) and the core means (14), and an engagement area axially spaced beyond the end section (26) of the plunger means (20),
wherein the armature means have an armature passage (32) which extends in the axial direction and the plunger means are realized for overlapping, at least in sections, an opening on the plunger side of the armature passage (32) in the area of the disk-shaped end section,
wherein the plunger means have a plunger passage (52, 54) through the disk-shaped end section (30), in such a manner that the plunger passage (52, 54) opens the armature passage (32) towards the armature space (40) between the armature means and the core means while equalizing the medium pressure when the armature means are contacted by the plunger means, and
wherein the disk-shaped end section has an annular step (50) defined by substantially parallel axially spaced circumferential surfaces, and wherein the annular step extends around a full circumference of the disk-shaped end section.