Valve kit for creating two types of valves

Abstract

Valve kit for creating two types of valves, namely normally open and normally closed solenoid valves, both designed for use in mounting holes (1) of a valve block, each valve, regardless of its type, comprising the following components: A base (2) with a central passage (3), wherein the base (2) is designed to be caulked in the mouth of one of the receiving bores (1), an outer sleeve (4) which is fixed concentrically to the central passage (3) on the outside of the base (2), an inner sleeve (10) which is fastened concentrically to the central passage (3) on the inside of the base (2) and which has a valve passage (11) at its end facing away from the base (2), a valve tappet (12) arranged concentrically to the central passage (3), one end of which is opposite the valve passage (11) and is designed to close the valve passage (11), and the other end of which is connected to a magnet armature (5), a ring filter (18) arranged on the outside of the inner sleeve (10) and covering side openings (16) in the outer surface of the inner sleeve (10), a bottom filter (21) arranged at the lower end of the inner sleeve (10), a pot-shaped guide sleeve (14) having a guide opening (15) for the valve tappet (12) in its base and whose outer surface rests against the inner surface of the inner sleeve (10), a valve spring (13) supported on the magnet armature (5), wherein, depending on the type of valve, the magnet armature (5) is either displaceably mounted in the outer sleeve (4) above the base (2) forming a magnet core (6), or is guided in the central passage (3), wherein in the latter case a magnet core (6) is fastened in the end of the outer sleeve facing away from the base (2), characterized by that the ring filter (18), the base filter (21), the guide sleeve (14) and the inner sleeve (10) are present in a single design so that they can be used for both types of valve, and that the bases (2) are present in two designs whose outer contours are identical and which only differ in the diameter of the central passage (3).

Description

[0001] The invention relates to a valve kit for creating two types of valves, namely normally open and normally closed solenoid valves, both designed for use in the mounting holes of a valve block, each valve, regardless of its type, comprising the following components: A base having a central passage, the base being designed to be caulked in the mouth of one of the receiving bores, an outer sleeve attached concentrically to the central passage on the outside of the base, an inner sleeve which is fixed concentrically to the central passage on the inside of the base and which has a valve passage at its end facing away from the base, a valve tappet arranged concentrically to the central passage, one end of which is opposite the valve passage and is designed to close the valve passage, and the other end of which is connected to a magnet armature, a ring filter arranged on the outside of the inner sleeve, which covers openings in the outer surface of the inner sleeve, a bottom filter arranged at the lower end of the inner sleeve, a pot-shaped guide sleeve, which has a guide passage for the valve tappet in its base and the outer surface rests on the inner surface of the inner sleeve, a valve spring which is supported on the magnet armature, whereby, depending on the type of valve, the magnet armature is either displaceably mounted in the outer sleeve above the base forming a magnet core or is guided in the central passage, whereby in the latter case a magnet core is fastened in the end of the outer sleeve facing away from the base.

[0002] The two types of valves mentioned in the preamble of claim 1, namely normally open and normally closed valves, are required, among other things, in hydraulic brake systems. A normally open valve (inlet valve) is located in the brake line leading from a brake pressure sensor to a wheel brake, while a normally closed solenoid valve (outlet valve) is located in a connection between the wheel brake and a reservoir. The brake line is therefore open when the inlet valve is de-energized, allowing pressure fluid to be forced into the wheel brakes either by means of a master brake cylinder or another pressure sensor, thereby building up brake pressure there.

[0003] In order to reduce this, both solenoid valves are energized so that the initially open inlet valve closes and the initially closed outlet valve opens so that pressure medium can flow into the reservoir, thereby reducing the wheel brake pressure.

[0004] Since both valves are essentially constructed in the same way, the suggestion was made early on (WO 2008 / 110 437 A1) to assemble the different valve types using identical valve components in a modular manner.

[0005] Furthermore, from WO 99 / 44 872 A1 an electromagnetic valve is known which comprises a housing base body for fastening in a valve receiving body, with a valve sleeve positioned on the housing base body, in which a magnet armature is guided, with a tappet which interacts with the magnet armature and whose valve closing member faces a valve seat body, and with a yoke ring which has a valve coil placed on the housing base body, wherein the housing base body, the valve sleeve, the magnet armature, the tappet and the yoke ring are designed as pre-assembled subassemblies, wherein the valve receiving body has a unit bore for fastening the housing base body and the subassemblies are joined together in a single assembly direction for the final assembly of the valve.

[0006] The invention is based on the task of creating valves that can be easily assembled and installed using as many similar components as possible.

[0007] To this end, the invention provides that the ring filter, the base filter and the inner sleeve are present in a single design so that they can be used for both types of valves, and that the bases are present in two designs whose outer contours are identical and which differ only in the diameter of the central passage.

[0008] These valves can be installed in a so-called valve block. A valve block is a metal body with several pocket-shaped mounting holes on its outer surface.

[0009] The base is inserted into the opening of one of the mounting holes and caulked into place, with the inner sleeve extending into the mounting hole. The outer sleeve protrudes from the valve block so that a coil can be placed there. When energized, the coil pulls the armature against the magnetic core, opening or closing the valve, depending on the design.

[0010] The valves are connected to each other and to the brake circuits via channels in the valve block. These channels open into an annular space between the inner sleeve and the wall surface of the mounting bore, as well as into a bottom space between the underside of the sleeve and the bottom of the mounting bore. Terms such as "bottom" and "top" are used to refer to installation in a valve block and mean "toward the valve block" or "away from it." In addition to the valves mentioned, a valve block typically also contains a pump assembly or a brake pressure sensor, which are actuated by a linear actuator.

[0011] To minimize the number of common components for both valve types, the invention provides for the ring filter, the base filter, the guide sleeve, and the inner sleeve to be provided in a single design. The sockets used are at least similar to each other, as their outer contours, which determine the ability to caulk them into the opening of the receiving bore, are identical. Only the inner diameter differs, which is due to the different valve functions and will be explained in more detail below using the exemplary embodiments.

[0012] The bases can therefore preferably be manufactured using a single tool mould, whereby these only need to be drilled out to different diameters to create the passage.

[0013] There are two options for connecting the base to the inner sleeve: The base can be provided with an inward-facing hollow cylindrical extension onto which the inner sleeve is fitted. This preferably has an outward-facing collar that rests against a base collar on the base. The base collar rests against a shoulder in the valve block's receiving bore, with the inner sleeve collar interposed, and is held against it when the base has been caulked into the opening of the receiving bore.

[0014] The other option is to weld the inner sleeve to the flat underside of the base.

[0015] To seal the annular space in the receiving bore from the base space, the invention provides that the filter ring has a circumferential sealing ridge on its outer side at the top, which rests against the outer surface of the receiving bore. At the bottom, there is a circumferential sealing ridge on the inside, which rests against the outer surface of the inner sleeve.

[0016] In order to be able to position a guide sleeve on the one hand and to ensure a support for a soil filter on the other, the invention provides that the inner sleeve has a main section and an end section, to which the bottom of the inner sleeve is connected, with the end section having a smaller diameter than the main section. The guide sleeve is inserted into this end section and centered. The soil filter is attached to the outer section of the end piece. To allow the valve to be inserted into the receiving bore, the diameter of the soil filter is smaller than the outer diameter of the main section.

[0017] The invention is explained in more detail below using two exemplary embodiments. Fig. 1a a normally open valve in a first embodiment and Fig. 1b a corresponding normally closed valve, Fig. 2a a normally open valve according to a second embodiment and Fig. 2b a corresponding normally closed valve.

[0018] The figures each show a valve inserted into a receiving bore 1 of a valve block. Each valve consists of a base 2, which is inserted into the opening of the receiving bore 1 and caulked there at its outer edge ( Fig. 1a, Fig. 2a before caulking, Fig. 1b, Fig. 2b after caulking). The base 2 has a central opening 3. On the outside of the base 2, concentrically to the opening 3, a sleeve produced by deep drawing (hereinafter outer sleeve 4) is placed, which in the versions according to Fig. 1a and Fig. 2a is pot-shaped, wherein in these embodiments a cylindrical magnet armature 5 is slidably arranged directly below the pot bottom and the base 2 functions as a magnet core 6. A coil (not shown here) is placed on the base 2 around the outer sleeve 4, the energization of which causes the magnet armature 5 and magnet core 6 to be magnetized and thus the magnet armature 5 is pulled downwards against the magnet core 6.

[0019] In the execution according to Fig. 1b and Fig. 2b, the magnetic armature 5 is guided in the passage 3 of the base 2. The function of a magnetic core 6 is performed by a plug 7, which is fastened in the upper end of the outer sleeve 4. A coil is also provided here, so that when energized, the magnetic armature 5 is pushed upward against the magnetic core 6.

[0020] An inner sleeve 10, also produced by deep drawing, is connected to the underside of the base 2 concentrically to the passage 3 and projects into the receiving bore 1. In the versions according to Fig. 1a and Fig. 1b, this is attached to an extension 9 of the base 2, while according to the embodiments according to Fig. 2a and Fig. 2b is welded to the flat underside of the base.

[0021] The inner sleeve 10 has the shape of a pot, with the pot bottom located at its end remote from the base 2. In the bottom is a valve passage 11 with a valve seat against which the head end of a valve tappet 12 can be sealingly applied.

[0022] For the normally open valves ( Fig. 1a, Fig. 1b), the valve tappet 12 is guided through the passage 3 in the base 2 almost to the bottom of the outer sleeve 4, where it is inserted and secured in the magnet armature 5. A valve spring 13 also extends through the passage 3 and is supported at one end on the underside of the magnet armature 5. The other end rests against a guide sleeve 14.

[0023] The guide sleeve 14 is pot-shaped, with a guide opening 15 in the pot base, the edge of which rests against the valve tappet 12 and guides it. The walls of the guide sleeve 14 rest against the inner wall of the inner sleeve 10. For this purpose, the sleeve is narrowed in the lower area, thus having a main area that adjoins the base 2 and an end area that merges into the base. The guide sleeve 14 is located in this end area and can either - as the Fig. 1a, Fig. 1b and Fig. 2b show - with the floor facing down or - as this Fig. 2b shows - be arranged with the bottom facing upwards. In either case, the valve spring 13 rests against the bottom of the guide sleeve 14. The guide sleeve 14 has several axial openings to ensure the flow of the operating medium.

[0024] The inner sleeve has side openings 16 through which the hydraulic connection to an annular space 17 in the valve block is made.

[0025] In the main area of ​​the inner sleeve 10, there is a ring filter 18 on its outside, which has a circumferential sealing ridge 19 on its outside at the top, which seals against the inner wall of the receiving bore 1. On the inside there is a circumferential sealing ridge 20, which seals against the outside of the inner sleeve 10, specifically in the area between the side openings 16 and the end area of ​​the inner sleeve 10. The upper end of the ring filter 18 abuts either the collar on the inner sleeve 10 or directly against the underside of the base 2.

[0026] A pot-shaped bottom filter 21 is placed on the end portion of the inner sleeve 10, with its outer diameter not being larger than the outer diameter of the main portion of the inner sleeve 10. The bottom filter 21 is located in the bottom space 22 of the receiving bore 1.

[0027] The valve spring 13 according to the normally closed valves ( Fig. 1b, Fig. 2b) is supported between the magnetic core 6 and the magnetic armature 5 and is located in a blind bore in the magnetic armature 5.

[0028] The normally open valves ( Fig. 1a, Fig. 2a) are closed by energizing the coil, so that the magnet armature 5 is pulled downward against the base 2, which here functions as the magnetic core 6. The valve stem 12, guided by the guide sleeve 14, is pressed with its head into the valve passage 11, closing it. To open the valve, the coil is de-energized again, so that the valve spring 13 returns the magnet armature 5 and thus the connected valve stem 12 to the open basic position.

[0029] For normally closed valves ( Fig. 1b, Fig. 2b), the valve spring 13 rests against the magnetic core 6 (= plug 7) and presses the magnetic armature 5, which is slidably mounted in the passage 3, downwards, thus forcing the valve tappet 12 attached to it into the valve passage 11. When the coil is energized, the magnetic armature 5 is pulled upwards against the magnetic core 6. This pulls the head of the valve tappet 12 out of the valve passage 11, opening the valve. When the valve is de-energized again, the valve spring 13 presses the valve tappet 12 back onto the valve passage 11.

[0030] When the valve passage 11 is open, there is a connection between the annular space 17 and the base space 22 via the side openings 16.

[0031] In this version of the valve kit, the ring filters 18 and the base filters 21, as well as the guide sleeves 14, are constructed identically. The inner sleeves 10 can also be designed identically.

[0032] The sockets 2 are at least of the same design as far as their outer contours are concerned. In particular, a circumferential socket collar 23 is provided, which rests on a step in the receiving bore 1, so that it is held there by squeezing the upper edge of the receiving bore. In the embodiments according to Fig. 1a and Fig. 2a, the collar of the inner guide sleeve is located between the base collar 23 and the step and is held in place in this way. In the versions according to the Fig. 2a and Fig. 2b, the base collar 23 rests directly on the step in the mounting hole 1. In the versions according to Fig. 1a and Fig. 1b, the ring filter 18 is located on the underside of the base collar 23, while in the versions according to Fig. 2a and Fig. 2b rests directly on the underside of the base. List of reference symbols 1 mounting hole 2 bases 3 Passage 4 outer sleeve 5 magnet armatures 6 magnetic core 7 plugs 9 Extension 10 inner sleeve 11 Valve passage 12 valve tappets 13 Valve spring 14 Guide sleeve 15 Guide opening 16 side openings 17 Annular space 18 ring filters 19 Sealing bar 20 sealing bar 21 bottom filters 22 floor space 23 Base collar

Claims

[1] Valve kit for creating two types of valves, namely normally open and normally closed solenoid valves, both designed for use in mounting holes (1) of a valve block, each valve, regardless of its type, comprising the following components: A base (2) with a central passage (3), wherein the base (2) is designed to be caulked in the mouth of one of the receiving bores (1), an outer sleeve (4) which is fixed concentrically to the central passage (3) on the outside of the base (2), an inner sleeve (10) which is fastened concentrically to the central passage (3) on the inside of the base (2) and which has a valve passage (11) at its end facing away from the base (2), a valve tappet (12) arranged concentrically to the central passage (3), one end of which is opposite the valve passage (11) and is designed to close the valve passage (11), and the other end of which is connected to a magnet armature (5), a ring filter (18) arranged on the outside of the inner sleeve (10) and covering side openings (16) in the outer surface of the inner sleeve (10), a bottom filter (21) arranged at the lower end of the inner sleeve (10), a pot-shaped guide sleeve (14) having a guide opening (15) for the valve tappet (12) in its base and whose outer surface rests against the inner surface of the inner sleeve (10), a valve spring (13) supported on the magnet armature (5), wherein, depending on the type of valve, the magnet armature (5) is either displaceably mounted in the outer sleeve (4) above the base (2) forming a magnet core (6), or is guided in the central passage (3), wherein in the latter case a magnet core (6) is fastened in the end of the outer sleeve facing away from the base (2), characterized by , that the ring filter (18), the base filter (21), the guide sleeve (14) and the inner sleeve (10) are present in a single design so that they can be used for both types of valve, and that the bases (2) are present in two designs whose outer contours are identical and which only differ in the diameter of the central passage (3). [2] Valve kit according to claim 1, characterized by that the bases (2) have an inwardly directed hollow cylindrical extension (9) onto which the inner sleeve (10) is placed. [3] Valve kit according to claim 2, characterized by that the inner sleeve (10) has an outwardly facing collar which bears against a base collar (23) on the base (2). [4] Valve kit according to claim 1, characterized by that the inner sleeve (10) is welded to the underside of the base (2). [5] Valve kit according to one of the preceding claims, characterized by that the ring filter (18) has a circumferential sealing web (19) on its outer side. [6] Valve kit according to one of the preceding claims, characterized by that the inner sleeve (10) has a main region and an end region to which a base is connected, wherein the end region has a smaller diameter than the main part, and wherein a guide sleeve (14) is inserted into the end region. [7] Valve kit according to claim 6, characterized bythat a bottom filter (21) is pot-shaped and is attached with its open side to the end area.

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