Control device for selectively fluidically connecting and disconnecting fluid connection points

Patent metadata

Field	Value
Publication number	US-2016178079-A1
Application number	US-201414913400-A
Country	US
Kind code	A1
Filing date	Aug 12, 2014
Priority date	Sep 16, 2013
Publication date	Jun 23, 2016
Grant date	—

Abstract

The invention relates to a control device for selectively fluidically connecting and disconnecting fluid connection points (A, P, T) by means of a valve apparatus ( 1, 5 ), which controls fluid-conducting connection channels ( 55, 57, 59 ) extending between the connection points (A, P, T), which connection channels are arranged in a control block ( 3 ), into which the valve apparatus ( 1, 5 ) is at least partially inserted. The control device is characterized in that, proceeding from the respective fluid connection points (A, P, T), the connection channels ( 55, 59, 57 ) respectively connected to the fluid connection points extend in parallel to each other until the connection channels lead into a respective associated control chamber ( 49; 53, 51 ) of the valve apparatus ( 1, 5 ) and that the valve apparatus ( 1, 5 ) is retained in a receptacle ( 39 ), which separates at least two adjacently arranged control chambers ( 49, 51 ) from each other.

First claim

1 . A control device for selectively fluidically connecting and disconnecting fluid connection points (A, P, T) by means of a valve apparatus ( 1 , 5 ), which controls fluid-conducting connection channels ( 55 , 57 , 59 ) extending between the connection points (A, P, T), which connection channels are arranged in a control block ( 3 ), into which the valve apparatus ( 1 , 5 ) is at least partially inserted, characterized in that, proceeding from the respective fluid connection points (A, P, T), the connection channels ( 55 , 59 , 57 ) respectively connected to the fluid connection points are arranged extending parallel to each other until the connection channels open into a respective assigned control chamber ( 49 ; 53 , 51 ) of the valve apparatus ( 1 , 5 ) and that the valve apparatus ( 1 , 5 ) is held in a receptacle ( 39 ), which separates at least two adjacently arranged control chambers ( 49 , 51 ) from each other.

2 . The control device according to claim 1 , characterized in that the valve apparatus ( 1 , 5 ) is provided with a casing ( 1 ), which itself at least partially forms a control chamber ( 53 ) and/or which has at least one bore ( 50 , 52 ) opening into a control chamber ( 49 , 51 ).

3 . The control device according to claim 1 , characterized in that, in view of the parallel arrangement of the connection channels ( 55 , 59 , 57 ), the receptacle ( 39 ) for the valve apparatus ( 1 , 5 ) is accommodated eccentric relative to the displacement axis of the valve gate ( 5 ), which is longitudinally-displaceably guided inside the valve casing ( 1 ), in the control block ( 3 ).

4 . The control device according to claim 1 , characterized in that the receptacle is formed from a circular cylindrical receiving plate ( 39 ), which has a preferably circular cylindrical recess ( 41 ) for receiving the valve casing ( 1 ), the center axis of which, extending parallel to the center axis of the receiving plate ( 39 ), is arranged offset relative to same.

5 . The control device according to claim 1 , characterized in that the connection channel ( 55 ) for the pressure supply connection (P) and the connection channel ( 57 ) for the service connection (A) take up, with their respective longitudinal axis, at least approximately the same distance to the displacement axis of the valve gate ( 5 ) and that the longitudinal axis of the connection channel ( 59 ) for the tank connection or return connection (T) is coextensive with the displacement axis of the valve gate ( 5 ).

6 . The control device according to claim 1 , characterized in that the pressure supply connection channel ( 55 ) extending in the control block ( 3 ) is formed such that it is longer than the service connection connecting channel (A) in the axial direction, and this, in turn, is formed such that it is longer than the tank connection channel ( 59 ). (Currently amended) The control device according to claim 1 , characterized in that the control chamber ( 49 ) into which the pressure supply connection channel ( 55 ) opens lies above the control chamber ( 51 ) into which the service connection connecting channel ( 57 ) opens, viewed in the actuation direction of the valve gate ( 5 ), and that these two control chambers ( 49 , 51 ) are separated from each other in a fluid-tight manner by means of the receptacle ( 39 ).

8 . The control device according to claim 1 , characterized in that the control chamber ( 51 ) into which the service connection connecting channel ( 57 ) opens lies above the control chamber ( 53 ) into which the tank connection channel ( 59 ) opens, viewed in the actuation direction of the valve gate ( 5 ), and that these two adjacent control chambers are separated from each other in a fluid-tight manner by means of valve casing parts ( 43 ), which are encompassed by parts ( 42 ) of the control block ( 3 ).

9 . The control device according to claim 1 , characterized in that the plate ( 39 ) of the receptacle is encompassed on the outer peripheral side by a sealing device ( 45 ), which produces the seal between the receptacle ( 39 ) and the control block ( 3 ).

10 . The control device according to claim 1 , characterized in that the control block ( 3 ) is a component of a transmission casing, in particular a mobile work machine, or can be attached to the transmission casing.

Assignees

• Hydac Fluidtechnik Gmbh

Inventors

• Schneider Gerd
• Bruck Peter

Classifications

• Y10T137/8671

  With annular passage [e.g., spool] · CPC title

• F16K31/0613

  with cylindrical slides · CPC title

• F16K27/029 Primary

  Electromagnetically actuated valves · CPC title