DE7402511U - Electric solenoid valve - Google Patents

Description

** I III

• • ft

»It · * · ♦ ι

H. 1,197 ¹ »He / Kb

Attachment to
Utility model registration

ROBERT BOSCH GMBH, 7 Stuttgart 1

Electric solenoid valve

The invention relates to a solenoid valve with a return valve coaxial with the armature on the top of a magnet armature guide tube and a working connection.

-2-

7402511 07.0175

-2- '19 2,

Such a solenoid valve is known (US 3,550,632). j

In this known valve, the working connection is on the side. ^: Lich led away from the valve housing. This makes the valve housing relatively cumbersome and expensive.

The invention is based on the object of simplifying and providing an electro-magnetic valve of the type mentioned at the beginning. approve. |

This object is achieved according to the invention in that an access from the solenoid valve to the working connection of a Ring filter is monitored, the outer ring of which together with a base of a return valve seat body at the upper end of the Magnet armature guide tube is clamped and that an inner ring of the ring filter in a "lateral surface of the Return valve seat body is embedded.

An embodiment of the invention is shown in the drawing.

An electro-magnetic valve 1 has a coil 2 which sits on the outside of a magnet armature guide tube 3. The armature guide tube 3 is placed on a cylindrical extension 4 of a base plate 5 on which the electromagnetic valve 1 is built. The cylindrical extension H is provided in the center with an axial bore 6 to which a pressure line 8 brought in from a pump 7 is connected.

On its inside facing an armature 9, the extension 4 carries a pipe section 10 inserted into the axial bore 6, the inner end face of which is the valve seat 11 of an inlet valve 11/12; the armature 9 carries the closing body 12 of the inlet valve 11/12. The pipe section 10 is surrounded by a spring 13 which strives to the armature 9 with its closure body 12 to keep away from the valve seat 11.

-3-

7402511 08/07/75

/ 111 ♦ «·. . I ι

1 Γ. 2 9 -3-

In the armature guide tube 3 are from above Return valve seat body 14, an intermediate ring 15 and a Ring filter 16 used.

The return valve seat body 14 has a conical jacket surface 18, at the inner end of which a return valve seat 19 for a return valve closing body ²⁰ is attached to the armature 9. In addition, the lateral surface 18 has an annular groove 21 into which an inner ring 22 of the annular filter 16 is let. Finally, the return valve seat body 14 has, for its attachment in the magnet armature guide tube 3, a base 23 which is provided with an axial opening 24 for the passage of pressure medium. The opening 24 is coaxial with the return valve 19/20, but provided outside of the same; it is part of a working connection to which a consumer 26 is connected via a line 25.

When flanging one end 17 of the armature guide tube is an outer ring 27 of the ring filter 16 together with the base 23 of the return valve seat body 14 on the armature guide tube 3 clamped.

The ring filter 16 monitors the access from the solenoid valve 1 to the working connection 24.

The mode of operation of the solenoid valve 1 is as follows:

The return valve 19/20 is closed in the de-energized starting position. The inlet valve 11/12 is open so that pressure medium from the pump 7 through the armature 9 "uni via the working connection 24 to the consumer 26 arrives. The pressure medium flowing through is cleaned by the filter 16 in the process.

7402511 08/07/75

• · t ·

-4- 19 2.

When the coil 2 receives current, the armature 9 is pulled downwards while the spring 13 is compressed, the inlet valve 11/12 is closed and the return valve 19/20 is opened. The pressure medium from the consumer flows back via the filter 16 u.id reaches a relief point 28 via the return valve 19/20. Filter 16 and working connection 2 ¹ I are thus easily attached to the solenoid valve 1.

-5- j

7402511 08/07/71

Claims (3)

It ···· ·· I • · ♦ »· ι • · · I -5- claims 1. Electro-solenoid valve with a return valve gleiohachsigen to the armature on the top of a magnet armature guide tube and a work connection, characterized in that an access from the solenoid valve f. I) to the work connection (24) is monitored by a ring filter (16) g, outer ring (27) together with a base (23) of a Return valve seat body (14) at the upper end (17) of the Magnet armature guide tube (3) is clamped and that an inner ring (22) of the ring filter (16) in a The outer surface (18) of the return valve seat body (14) is embedded. 2. Solenoid valve according to claim 1, characterized in that the lateral surface (18) is conical. 3. Solenoid valve according to claim 1 or 2 with in the armature guide tube crimped return valve seat, thereby characterized in that the ring filter (16) and the return valve seat body (14) together, optionally below Intermediate layer of an intermediate ring (15) into which the armature guide tube (3) are crimped. 7402511 07.oe.75