US 11,754,096 B2
Pilot device for a directional valve without internal cable connections
Benjamin Nemes, Budapest (HU); Carl Dissoubray, Budaors (HU); Christoph Keyl, Stuttgart (DE); Gergely Laszlo Hegedus-Fuchs, Hodmezovasarhely (HU); Jan-Peter Reibert, Weissach (DE); Matthias Beck, Neu-Ulm (DE); Peter Pozsega, Kaposvar (HU); Steffen Knapper, Vaihingen/Enz (DE); Matthias Lang, Roden (DE); Liebhart Zaiser, Karlstadt (DE); and Thomas Haas, Fellen (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Filed by Robert Bosch GmbH, Stuttgart (DE)
Filed on Jan. 28, 2020, as Appl. No. 16/774,637.
Claims priority of application No. 10 2019 204 246.5 (DE), filed on Mar. 27, 2019.
Prior Publication US 2020/0309162 A1, Oct. 1, 2020
Int. Cl. F15B 13/04 (2006.01); H01R 13/405 (2006.01); H05K 7/14 (2006.01); H01F 27/24 (2006.01); H01F 27/28 (2006.01); H05K 1/18 (2006.01); F15B 13/043 (2006.01); H01F 7/08 (2006.01); H01F 27/30 (2006.01); F16K 37/00 (2006.01); F16K 31/06 (2006.01); F16K 31/02 (2006.01)
CPC F15B 13/0402 (2013.01) [F15B 13/0433 (2013.01); F16K 37/0041 (2013.01); H01F 7/08 (2013.01); H01F 27/24 (2013.01); H01F 27/28 (2013.01); H01F 27/306 (2013.01); H01R 13/405 (2013.01); H05K 1/181 (2013.01); H05K 7/1427 (2013.01); F15B 2013/0409 (2013.01); F15B 2211/30 (2013.01); F15B 2211/329 (2013.01); F16K 31/02 (2013.01); F16K 31/0613 (2013.01); F16K 37/0033 (2013.01); H05K 2201/10053 (2013.01); H05K 2201/10151 (2013.01); Y10T 137/5987 (2015.04); Y10T 137/8242 (2015.04)] 12 Claims
OG exemplary drawing
 
1. A pilot device for a hydraulic directional valve, comprising:
a housing configured to be mounted externally on the hydraulic directional valve via a mounting surface, the housing equipped with an electrical plug connection that is accessible from the outside;
a pilot valve received within the housing and configured as a cartridge valve having a valve axis, the pilot valve including an electromagnetic actuating device;
a displacement sensor received within the housing, the displacement sensor including a soft iron core, which, in the region of the mounting surface, is coupled for movement to a control spool of the displacement valve so that the soft iron core is linearly movable along a sensor axis;
an electronic circuit board received within the housing;
a fluid feed, a fluid return, a first control connection, and a second control connection (i) defined in the housing in the region of the mounting surface and (ii) fluidically connected to the pilot valve within the housing; and
at least two coils arranged around the soft iron core, the at least two coils combined to form a coil assembly,
wherein the valve axis and the sensor axis are arranged substantially parallel to one another so that the valve axis and the sensor axis define a reference plane,
wherein the electromagnetic actuating device and the coil assembly are arranged adjacent to one another,
wherein the circuit board extends in a plane that is parallel to the reference plane,
wherein, to establish an electrical contact, each of the coil assembly, the electromagnetic actuating device, and the electrical plug connection is either (i) soldered directly to the circuit board or (ii) is in breakable electrical contact with a respectively associated, rigid contact assembly, which is soldered directly to the circuit board.