Abstract
A valve armature for a solenoid valve includes a main body and a tappet that interacts with a valve seat. The main body and the tappet are connected to one another via a connecting apparatus. The connecting apparatus has at least one first latching element that is arranged on the tappet and at least one second latching element that is arranged on the main body. The latching elements are configured for a positively locking and/or non-positive latching connection.
Claims
1. A valve armature for a solenoid valve, comprising: a main body; a tappet that interacts with a valve seat; and a connecting apparatus configured to connect the main body and the tappet to one another, the connecting apparatus having at least one first latching element that is arranged on the tappet and at least one second latching element that is arranged on the main body, wherein the latching elements are configured for one or more of a positively locking connection and a non-positive latching connection.
2. The valve armature according to claim 1, wherein the at least one first latching element or the at least one second latching element is configured as a resilient latching bracket.
3. The valve armature according to claim 1, wherein the at least one second latching element or the at least one first latching element is configured as a latching edge.
4. The valve armature according to claim 2, wherein the tappet is configured as an injection molded plastic part onto which the at least one first latching element that is configured as a latching bracket is formed integrally.
5. The valve armature according to claim 3, wherein the main body is configured as a metal part, and wherein the at least one second latching element that is configured as a latching edge is introduced into the main body.
6. The valve armature according to claim 2, wherein the at least one first latching element that is configured as a latching bracket bears against an outer wall of the main body.
7. The valve armature according to claim 3, wherein: the at least one first latching element or the at least one second latching element is configured as a resilient latching bracket, and at least two first latching elements that are configured as latching brackets are arranged so as to lie opposite one another and configure the corresponding latching connections with at least two corresponding latching edges that are arranged so as to lie opposite one another.
8. The valve armature according to claim 1, wherein the tappet and the main body are additionally connected to one another via a press-fit connection.
9. The valve armature according to claim 8, wherein the main body has a receiving opening on an end wall that faces the tappet, and wherein a first end region of the tappet that faces the main body is configured to be introduced and pressed into the receiving opening.
10. A solenoid valve, comprising: a magnet assembly; and a valve cartridge including a valve sleeve, a valve armature that is mounted axially movably in the valve sleeve, and a valve body with a valve seat, the valve armature including: a main body, a tappet that interacts with the valve seat, and a connecting apparatus configured to connect the main body and the tappet to one another, the connecting apparatus having at least one first latching element that is arranged on the tappet and at least one second latching element that is arranged on the main body, wherein the latching elements are configured for one or more of a positively locking connection and a non-positive latching connection.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0017] One exemplary embodiment of the disclosure is shown in the drawings and will be described in greater detail in the following description. In the drawings, identical designations denote components or elements which carry out identical or analogous functions.
[0018] FIG. 1 shows a diagrammatic sectional illustration of one exemplary embodiment of a valve armature according to the disclosure.
[0019] FIG. 2 shows a diagrammatic perspective illustration of a tappet of the valve armature according to the disclosure from FIG. 1.
[0020] FIG. 3 shows a diagrammatic perspective illustration of a main body of the valve armature according to the disclosure from FIG. 1.
DETAILED DESCRIPTION
[0021] A valve cartridge (not shown) for a solenoid valve has a pole core, a guide sleeve which is connected to the pole core, and a valve armature 10 which is guided within the guide sleeve such that it can be moved axially between a closed position and an open position counter to the force of a restoring spring. As can be seen from FIG. 1, the valve armature 10 comprises a main body 11 and a tappet 20, a valve seat being arranged between at least one first flow opening and at least one second flow opening. The tappet 20 interacts with the valve seat in a sealing manner in the closed position and interrupts a fluid flow between the at least one first flow opening and the at least one second flow opening. In the open position, the tappet 20 is lifted up from the valve seat and makes the fluid flow possible between the at least one first flow opening and the at least one second flow opening.
[0022] As can be seen from FIGS. 1 to 3, the valve armature 10 for a solenoid valve in the exemplary embodiment which is shown comprises the main body 11 and the tappet 20 which interacts with the valve seat, the main body 11 and the tappet 20 being connected to one another via a connecting apparatus 30. Here, the connecting apparatus 30 has at least one first latching element 31 which is arranged on the tappet 20 and at least one second latching element 32 which is arranged on the main body 11, the latching elements 31, 32 configuring a positively locking and/or non-positive latching connection.
[0023] As can be seen, furthermore, from FIGS. 1 to 3, the at least one first latching element 31 is configured as a resilient latching bracket 31.1 and the at least one second latching element 32 is configured as a latching edge 32.2 in the exemplary embodiment which is shown. In an alternative exemplary embodiment (not shown), the at least one second latching element 32 is configured as a resilient latching bracket 31.1 and the at least one first latching element 31 is configured as a latching edge 32.2.
[0024] As can be seen, furthermore, from FIGS. 1 and 2, the tappet 20 in the exemplary embodiment which is shown is configured as an injection molded plastic part, onto which the at least one first latching element 31 which is configured as a latching bracket 31.1 is integrally cast or molded. The injection molded plastic part is manufactured from a thermoplastic. Other suitable plastics can also be used for manufacturing the tappet 20. The at least one first latching element 31 has a latching lug 31.2 at one end region. Furthermore, the at least one latching bracket 31.1 projects substantially perpendicularly from a pin-shaped first end region 22 of the tappet 20 which faces the main body 11, and has a right-angled bend 31.3. As a result, the at least one first latching element 31 which is configured as a latching bracket 31.1 bears against an outer wall 11.3 of the main body 11. In an alternative exemplary embodiment (not shown), the latching brackets 31.1 can also be arranged on the main body 11 and can configure the latching connection with a latching edge 32.2 on the tappet 20. A closing body 24.2 is arranged at a second end region 24 of the tappet 20 which faces the valve seat and faces away from the main body 11. In the exemplary embodiment which is shown, the closing body 24.2 is configured as a spherical cap and is molded integrally onto the cylindrical tappet 20. It goes without saying that other suitable geometric shapes can also be used for the closing body 24.2 and the tappet 20. Thus, the closing body 24.2 can be configured, for example, as a cone or as a truncated cone. In order to achieve an additional damping action, the closing body 24.2 can be configured as an injection molded plastic part, such as a PEEK part. The tappet 20 has a smaller external diameter at the second end region 24 which faces the valve seat and faces away from the main body 11 than at the first end region 22 which faces the main body 11.
[0025] As can be seen, furthermore, from FIGS. 1 and 3, the main body 11 in the exemplary embodiment which is shown is configured as a metal part, the at least one second latching element 32 which is configured as a latching edge 32.2 being introduced into the main body 11. In the exemplary embodiment which is shown, the main body 11 is configured as a sintered iron component. The main body 11 has a cavity 11.8, in which a restoring spring (not shown) can be guided. As an alternative, the main body 11 can also have a different magnetizable material. Furthermore, the main body 11 can also be configured as a cold peened part, in order to be brought into a predefined shape. By way of the energization of a magnet assembly (not shown in greater detail), a magnetic force is generated which moves the main body 11, configured as a sintered iron component, of the valve armature 10 of a normally open solenoid valve from the open position into the closed position. Here, the tappet 20 which is connected to the main body 11 comes into contact with the corresponding valve seat (not shown in greater detail) and seals the latter. In the non-energized state, the restoring spring moves the main body 11 with the tappet 20 back into the starting position, and the tappet 20 lifts up from the valve seat and releases the latter. In the case of a normally closed solenoid valve, the main body 11 with the tappet 20 is moved from the closed position into the open position by way of the energization of the magnet assembly, and the tappet 20 lifts up from the valve seat and releases the latter. If the current is switched off, the restoring spring moves the main body 11 with the tappet 20 back in the direction of the valve seat and presses the tappet 20 into the valve seat and seals the latter.
[0026] As can be seen, furthermore, from FIG. 1, the tappet 20 and the main body 11 are additionally connected to one another via a press-fit connection 34. For this purpose, the main body 11 has a receiving opening 11.1 on a side wall which faces the tappet 20. The first end region 22 of the tappet 20 which faces the main body 11 is introduced and pressed into said receiving opening 11.1. The first end region 22 of the tappet 20 which faces the main body 11 is of pin-shaped configuration. As a result, an inner wall 11.2 of an end region 11.6 of the main body 11 bears against an outer wall 22.2 of the first end region 22 of the tappet 20.
[0027] As can be seen, furthermore, from FIG. 1, the latching lugs 31.2 engage into the latching edges 32.2 and configure the positively locking and/or non-positive clip-like latching connection. In the exemplary embodiment which is shown, the main body 11 has two grooves 11.4 on the outer wall 11.3 which run in the longitudinal direction and end at the level of the receiving space 11.1. The grooves 11.4 can be introduced into the main body 11 by means of turning or milling or sintering or cold forming or by means of a combination of the stated processes. A projection is produced here which acts as a latching edge 32.2. As an alternative, the latching edge 32.2 can also be configured as a bead or as a projection on the outer wall 11.3 of the main body 11 or as an undercut and/or as an edge of a cutout of the main body 11. The tappet 20 has two first latching elements 31 which are configured as latching brackets 31.1. The two latching brackets 31.1 are arranged so as to lie opposite one another, and configure the corresponding latching connections with the two corresponding latching edges 31.2 which are arranged so as to lie opposite one another. Here, the end region 11.6 of the main body 11 which faces the tappet 20 is clamped between the two latching brackets 21.1 or between the latching brackets 21.1 and the outer wall 22.2 of the pin-shaped first end region 22 of the tappet 20. In an alternative exemplary embodiment, the tappet 20 can have more than two latching brackets 31.1 which are arranged distributed homogeneously on the circumference of the tappet 20 and between which the end region 11.6 of the main body 11 which faces the tappet 20 is clamped. For example, three latching brackets 31 which are at a spacing from one another of 120° or four latching brackets 31 which are at a spacing from one another of 90° and are arranged so as to lie opposite one another in pairs would be conceivable. Correspondingly, the main body 11 of the valve armature 10 then has three or four latching edges 32.2 which configure the corresponding three or four latching connections with the latching brackets 31.
[0028] Embodiments of the present disclosure provide a valve armature for a solenoid valve, which valve armature opens and closes reliably. By way of the use of at least one positively locking and/or non-positive latching connection which is configured by at least one first latching element which is arranged on the tappet and at least one second latching element which is arranged on the main body, release of a tappet from the main body in the case of energization of the solenoid valve or in the case of a spring force acting can at least be made difficult or can be suppressed completely.
