The present invention provides a two-stage electromagnetic valve (50) for use in controlling fluid flow between first and second passageways (P1;P2) in a hydraulic valve block (2), comprising: a one-piece valve body (200) defining a central axis (B) and having a central opening (201) therethrough, the central opening (201) having a first diameter, the valve body (200) having a lower end (204) adapted to be inserted into a bore (19) of the valve block (2) and provided with a lower cylindrical opening (207), the lower end (204) of the valve body (200) including a radially inwardly extending shoulder (218) defining a valve seat (218) and a cylindrical tubular portion (216) extending downwardly from the valve seat (218), the cylindrical tubular portion (216) having a second diameter smaller than the first diameter; an armature (206) axially moveable within the valve body (200) and spring (224) biased in one axial direction (57A); a closing element (30) carried by a lower end (210) of the armature (206); an electromagnetic coil (64') coaxially surrounding the armature (206) and operable to effect axial movement of the armature (206) in an axial direction (57B) opposite the one direction (57A); a cage (246) having a central opening (251) therethrough, the cage (246) having an upper end (248) attached to the lower end (210) of the armature (206) and a lower end (250); and a poppet (226) having a bore (238) therethrough, the poppet (226) disposed within the central opening (251) of the cage (246) and spring (244) biased away from the lower end (210) of the armature (206); the lower end (250) of the cage (246) having a radially inwardly extending cage shoulder (252) defining a cage opening (254); a lower end of the poppet (226) is engageable with the valve seat (218); and a seal (262) carried by the lower end (204) of the valve body (200), the seal (262) engageable with the bore (19) of the valve block (2).
ELECTROMAGNETIC VALVE
ELEKTROMAGNETVENTIL
SOUPAPE ÉLECTROMAGNÉTIQUE
10.04.2019
Patent
Elektronische Ressource
Englisch