Solenoid Valve and Method for Producing a Solenoid Valve

Abstract

A solenoid valve includes a magnet assembly, a valve cartridge having a pole core, a valve sleeve connected to the pole core, an armature, and a valve body. The armature is guided in an axially movable manner within the valve sleeve and is coupled to a closing element. The magnet assembly generates a magnetic field via energizing a coil winding. The magnetic field moves the armature counter to a force of a spring. The valve body is positioned within the valve sleeve. A valve seat of the valve body forms a main valve with the closing element that sets a fluid flow between at least one first fluid opening and at least one second fluid opening. A positive connection between the valve sleeve and the valve body is formed to prevent movement of the valve body introduced into the valve sleeve counter to a direction of introduction.

Claims

1. A solenoid valve, comprising: a magnet assembly including a coil winding, the magnet assembly configured to generate a magnetic field via energizing the coil winding; a valve cartridge including a pole core; a valve sleeve connected to the pole core; an armature configured to be guided in an axially movable manner within the valve sleeve and coupled to a main closing element; a valve body introduced into the valve sleeve in a direction of introduction, the valve body including a main valve seat configured to form a main valve with the main closing element; and a connection element configured to form a positive connection between the valve sleeve and the valve body, and to prevent movement of the valve body counter to the direction of introduction, wherein the magnetic field is configured to move the armature counter to a force of a restoring spring, and wherein the main valve is configured to set a fluid flow between at least one first fluid opening and at least one second fluid opening.

2. The solenoid valve according to claim 1, wherein the at least one second fluid opening is arranged on the valve sleeve.

3. The solenoid valve according to claim 1, wherein: at least one second fluid opening of the at least one second fluid opening includes a retaining tab; and the retaining tab is configured such that, in a non-deformed state, the retaining tab does not hinder insertion of the valve body into the valve sleeve, and, in a deformed state, the retaining tab corresponds to the connection element.

4. The solenoid valve according to claim 1, wherein: the at least one second fluid opening includes at least two second fluid openings; a number of the at least two second fluid openings includes a plurality of retaining tabs; and the retaining tabs are distributed uniformly over a circumference of the valve sleeve.

5. The solenoid valve according to claim 1, wherein: the valve sleeve includes a contour stop for the valve body; and the contour stop is configured to prevent the movement of the valve body in the direction of introduction.

6. The solenoid valve according to claim 1, wherein: the valve sleeve includes two parts and includes a valve sleeve upper part and a valve lower part; and the valve body is arranged in the valve lower part.

7. The solenoid valve according to claim 6, wherein at least one of (i) the connection element, (ii) the at least one second fluid opening, and (iii) the at least one first fluid opening is formed in the valve lower part.

8. A method for producing a solenoid valve including a magnet assembly having a coil winding and a valve cartridge having a pole core, the method comprising: connecting a valve sleeve to the pole core; coupling an armature to a main closing element, the armature configured to be guided in an axially movable manner within the valve sleeve; generating a magnetic field via the magnet assembly by energizing a coil winding; positioning a valve body within the valve sleeve, the valve body including a main valve seat, the main valve seat forming a main valve with the main closing element; and forming a positive connection between the valve sleeve and the valve body to prevent a movement of the valve body counter to a direction of introduction of the valve body to the valve sleeve, wherein the magnetic field is configured to move the armature counter to a force of a restoring spring, and wherein the main valve is configured to set a fluid flow between at least one first fluid opening and at least one second fluid opening.

9. The method according to claim 8, wherein: at least one second fluid opening of the at least one second fluid opening includes a retaining tab; and plastic deformation of the retaining tab forms the positive connection between the valve sleeve and the valve body.

10. The method according to claim 8, wherein radial caulking forms the positive connection between the valve sleeve and the valve body.

11. The method according to claim 9, further comprising: producing the at least one second fluid opening via a single punching operation.

12. A device for producing a solenoid valve, the device configured to: allow a production of at least one second fluid opening of the solenoid valve via a single punching operation, the solenoid valve including: a magnet assembly including a coil winding and configured to generate a magnetic field via energizing the coil winding; a valve cartridge including a pole core; a valve sleeve connected to the pole core; an armature configured to be guided in an axially movable manner within the valve sleeve and coupled to a main closing element; and a valve body arranged within the valve sleeve and including a main valve seat, the main valve seat forming a main valve with the main closing element, wherein the magnetic field is configured to move the armature counter to a force of a restoring spring, wherein the main valve is configured to set a fluid flow between at least one first fluid opening and at least one second fluid opening, wherein a positive connection between the valve sleeve and the valve body is formed such that a movement of the valve body introduced into the valve sleeve counter to a direction of introduction of the valve body is prevented, wherein at least one second fluid opening of the at least one second fluid opening includes a retaining tab, and wherein the positive connection between the valve sleeve and the valve body is formed via plastic deformation of the retaining tab.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0036] It should be pointed out that the features that are described individually in the description can be combined with one another in any desired, technically appropriate way, and can indicate further refinements of the disclosure. Further features and practicalities of the disclosure result from the description of exemplary embodiments on the basis of the appended figures, in which:

[0037] FIG. 1 shows a schematic sectional representation of a solenoid valve according to the prior art, and

[0038] FIG. 2 shows schematic representations of part of a solenoid valve according to the prior art, and

[0039] FIG. 3 shows schematic representations of part of a solenoid valve according to one possible embodiment of the disclosure, and

[0040] FIG. 4 shows a representation of the process according to one possible embodiment of the disclosure.

DETAILED DESCRIPTION

[0041] FIG. 1 shows a schematic sectional representation of a solenoid valve according to the prior art. In this respect, reference should be made to the comments with respect to the prior art.

[0042] FIG. 2 shows schematic representations of part of a solenoid valve according to the prior art. Here, a spatial representation of the valve lower part 18 with the fluid openings 5 is shown in the left half of the image. In the right half of the image there is a sectional representation of the valve lower part 18. The valve body 18 and the main closing element 17 are also represented here.

[0043] FIG. 3 shows schematic representations of part of a solenoid valve according to one possible embodiment of the disclosure. Here, a spatial representation of the valve lower part 18 with the fluid openings 5 is shown in the depiction on the left. The middle one of the fluid openings 5 represented has in this case a retaining tab 25. The retaining tab is depicted in a non-deformed initial state. The depiction in the middle likewise shows a spatial representation of the valve lower part 18. Here, however, the retaining tab 25 is depicted in the deformed state. The deformation of the retaining tab 25 thereby forms the positive connection between the valve lower part 18 and the valve body 19, which is positioned within the valve lower part 18. The depiction on the right shows a sectional representation with the retaining tabs 25 formed by the caulking. Also represented here is the valve body 19, which has been introduced into the valve lower part 18 up to a contour stop 26. It can be seen here how a movement of the valve body 19 counter to its direction of introduction is prevented by means of the deformed retaining tabs 25. The main closing element 17 is also represented.

[0044] In FIG. 4, a representation of the method steps of one embodiment of the disclosure is shown. Here, in a first step S1, the creation of the basic form of the valve sleeve, or of the valve lower part, takes place. In a second step S2, the punching process takes place. Here, all of the fluid openings are created in only one process step. In other words, both the fluid openings with retaining tabs and the fluid openings without retaining tabs are produced in one punching operation. The punching operation is performed as a radial punching operation. In a next step S3, the insertion of the valve body into the valve sleeve, or the valve lower part, takes place. This takes place as pressing in. Here, the exact position of the valve body is also set. If appropriate, this may also be understood as an independent step S4. In a subsequent step S5, the formation of the positive connection between the valve sleeve, or the valve lower part, and the valve body takes place. For this, a radial caulking is performed. For example, the formed retaining tabs are bent over, in order to prevent possible pressing out of the valve body. Subsequently, in step S6, the fitting of the joined-together components into the solenoid valve, or the assembly of the solenoid valve, takes place.