A micro rocker solenoid valve

Abstract

The present invention relates to the technical field of solenoid valves and provides a miniature rocker arm solenoid valve comprising a housing, a valve cover, a valve seat, and a fastener. The valve cover is located at one end of the housing, and an open receiving groove is provided on the side of the valve cover facing the housing. The valve seat is integrally formed with the end of the housing facing the valve cover, and a connecting portion is provided on the side of the valve seat facing the valve cover that can be embedded in the receiving groove. The fastener is used to connect the connecting portion and the valve cover when the connecting portion is embedded in the receiving groove. By improving the structure of the housing, valve cover, and valve seat and their connection method, the present invention facilitates reducing the size of the rocker arm solenoid valve, simplifying the assembly process of the rocker arm solenoid valve, and reducing the cost of the rocker arm solenoid valve.

Description

Technical Field

[0001] The present invention relates to the technical field of solenoid valves, and in particular to a miniature rocker arm solenoid valve. Background Art

[0002] The contents in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] A rocker arm solenoid valve is a solenoid valve that relies on a rotating arm to drive a sealing diaphragm to alternately seal the normally closed and normally open ends of the valve. It is widely used due to its advantages such as small pumping volume, small volume fluctuations when switching flow paths, and strong pressure resistance.

[0004] Generally, a rocker arm solenoid valve is usually composed of components such as a housing, a valve cover, a valve seat, and a flow switching mechanism. Among them, the flow switching mechanism composed of components such as a rotating arm and a sealing diaphragm is arranged in a chamber formed by assembling the housing, the valve cover and the valve seat.

[0005] In the related art, the volume of known rocker arm solenoid valves is often large. This is because components such as the housing, valve cover and valve seat are usually independent of each other. Therefore, it is necessary to provide a suitable assembly position by increasing the volume of the corresponding components. At the same time, since components such as the housing, valve cover and valve seat are independent of each other, the assembly process of the rocker arm solenoid valve is relatively cumbersome, and additional seals need to be added to achieve reliable sealing between different components, which further increases the cost of the rocker arm solenoid valve. Summary of the Invention

[0006] The object of the present invention is to provide a miniature rocker solenoid valve, which improves the structure of the outer shell, valve cover and valve seat and their connection method, thereby helping to reduce the volume of the rocker solenoid valve, simplify the assembly process of the rocker solenoid valve, and reduce the cost of the rocker solenoid valve.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] A miniature rocker arm solenoid valve, comprising:

[0009] shell;

[0010] A valve cover is located at one end of the housing; a receiving groove with an open structure is provided on a side of the valve cover facing the housing;

[0011] A valve seat is integrally formed at one end of the housing facing the valve cover; a connecting portion capable of being embedded in the accommodating groove is provided on one side of the valve seat facing the valve cover;

[0012] A fastener is used to connect the connecting portion and the valve cover when the connecting portion is embedded in the accommodating groove.

[0013] In some possible embodiments, the valve cover is provided with connection holes corresponding one to one with the fasteners, and the connection holes sequentially penetrate two opposite sides of the valve cover adjacent to the opening of the receiving groove;

[0014] The connecting portion is provided with a connecting groove capable of being aligned with the connecting hole, and the connecting groove is a through groove provided on the outer wall of the connecting portion and having an open structure;

[0015] When the connecting portion is embedded in the accommodating groove, the fasteners pass through the connecting hole on the valve cover and the connecting groove on the connecting portion respectively.

[0016] In some possible embodiments, a flow path switching mechanism is further included, wherein the flow path switching mechanism includes a rotating arm, a rotating shaft, a sealing diaphragm, and a driving assembly;

[0017] A movable cavity with an open structure is provided on a side of the connecting portion facing away from the housing, the rotating arm is rotatably disposed in the movable cavity via a rotating shaft, the sealing diaphragm is connected to the rotating arm and forms a transition cavity with the valve cover, and a normally closed end and a normally open end communicating with the transition cavity are provided on a side of the valve cover facing away from the valve seat;

[0018] An annular bearing step is provided in the receiving groove, and the outer edge of the sealing diaphragm is supported on the bearing step and sealed with the bearing step;

[0019] The driving assembly is used to drive the rotating arm to rotate, so that the sealing diaphragm is driven by the rotation of the rotating arm to alternately seal the normally closed end and the normally open end.

[0020] In some possible embodiments, a side of the bearing step facing the sealing diaphragm is provided with an annular protrusion extending toward the sealing diaphragm, the sealing diaphragm is provided with an inner groove adapted to the protrusion, and the protrusion is embedded in the inner groove.

[0021] In some possible embodiments, the driving assembly includes a slide, a first elastic member, a second elastic member, a moving iron core, an iron stop, and a coil;

[0022] A sliding groove communicating with the movable cavity is provided inside the valve seat, the sliding seat is slidably arranged in the sliding groove, and the sliding seat is provided with a pushing portion abutting against the rotating arm;

[0023] The first elastic member and the pushing portion are arranged opposite to each other with the rotating shaft as the center, one end of the first elastic member is connected to the rotating arm, and the other end of the first elastic member is connected to the sliding seat;

[0024] The second elastic member is provided on a side of the slide away from the rotating arm, the elastic force of the second elastic member is greater than the elastic force of the first elastic member, one end of the second elastic member is connected to the slide, and the other end of the second elastic member is connected to the valve seat;

[0025] The movable iron core, the coil, and the iron stop are all disposed inside the housing. One end of the movable iron core extends into the sliding groove and passes through the second elastic member before being connected to the sliding seat. The movable iron core and the sliding seat are integrally formed.

[0026] A gap is reserved between one end of the moving iron core away from the slide seat and the stop iron, and the coil is arranged around the moving iron core and the stop iron.

[0027] In some possible embodiments, a protective cover is provided inside the housing, the movable iron core and the stop iron are both provided in the protective cover, and the movable iron core and the protective cover are slidably engaged;

[0028] The coil is a self-adhesive coil and is adhered to the outer wall of the protective cover.

[0029] In some possible embodiments, the fastener is a pin, and the axis of the pin is parallel to the axis of the rotating shaft.

[0030] In some possible embodiments, there are two fasteners, and the two fasteners are symmetrically arranged with the rotating shaft as the center.

[0031] In some possible embodiments, the housing includes a shell and a protective cover, the shell is provided with a housing cavity for accommodating the coil, and at least one side of the housing cavity is an open structure;

[0032] The protective cover is detachably connected to the housing to seal the opening of the accommodating cavity.

[0033] In some possible embodiments, mounting portions are provided on opposite sides of the valve seat, and a first mounting hole is provided on the mounting portion;

[0034] The valve cover is provided with second mounting holes corresponding to the first mounting holes one by one, and the first mounting holes and the second mounting holes are aligned.

[0035] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0036] 1. The micro rocker solenoid valve provided by the present invention provides an integrated structure for the valve seat and the housing, eliminating the need for assembly between the valve seat and the housing, and eliminating the seal used in known rocker solenoid valves to achieve reliable sealing between the valve seat and the housing. This simplifies the assembly process of the rocker solenoid valve and reduces costs.

[0037] 2. The present invention provides a connecting portion on the valve seat and a receiving groove on the valve cover to accommodate the connecting portion. When the valve seat and the valve cover are assembled, the connecting portion is completely accommodated in the receiving groove, thereby effectively reducing the volume of the entire rocker arm solenoid valve after assembly and further simplifying the assembly process between the valve seat and the valve cover.

[0038] 3. The present invention provides a bearing step for supporting the sealing diaphragm inside the valve cover. On the basis of ensuring that the sealing diaphragm can form a transition cavity between the normally closed end and the normally open end of the valve cover, there is no need to add a sealing member between the valve cover and the valve seat after the valve cover and the valve seat are assembled, thereby further reducing the cost of the rocker arm solenoid valve.

[0039] 4. The present invention provides an integrated structure for the slide and the moving iron core constituting the driving assembly, which can make the dimensional chain between the slide and the moving iron core more accurate, thereby optimizing the dimensional chain design of the entire rocker arm solenoid valve.

[0040] 5. The present invention adopts a self-adhesive coil, which can increase the coil winding space while reducing the gap between the coil and magnetic components such as the moving iron core, thereby increasing the electromagnetic force that can be generated when the coil is energized. It can also eliminate the frame used to fix the coil in the known rocker arm solenoid valve, further reducing the cost of the rocker arm solenoid valve and simplifying the installation process of the coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic structural diagram of a micro rocker arm solenoid valve provided in an embodiment of the present invention;

[0042] Figure 2 An exploded diagram of the structure of a micro rocker arm solenoid valve provided by an embodiment of the present invention;

[0043] Figure 3 A schematic structural diagram of a valve cover provided in an embodiment of the present invention;

[0044] Figure 4 An exploded view of the structure of a housing including a valve seat provided in an embodiment of the present invention;

[0045] Figure 5 A side view of a micro rocker arm solenoid valve provided by an embodiment of the present invention;

[0046] Figure 6 for Figure 5 Cross-sectional view along the AA axis;

[0047] Figure 7 for Figure 6 A partial enlarged view of the miniature rocker arm solenoid valve is shown.

[0048] Icons: 10-shell, 11-shell, 12-protective cover, 13-accommodating chamber, 20-valve cover, 21-accommodating groove, 22-connecting hole, 23-normally closed end, 24-normally open end, 25-bearing step, 26-protrusion, 27-second mounting hole, 30-valve seat, 31-connecting part, 32-connecting groove, 33-movable chamber, 34-sliding groove, 35-mounting part, 36-first mounting hole, 40-flow path switching mechanism, 41-rotating arm, 42-rotating shaft, 43-sealing diaphragm, 44-driving assembly, 441-sliding seat, 4411-pushing part, 442-first elastic member, 443-second elastic member, 444-moving iron core, 445-stop iron, 446-coil, 50-fastener, 60-protective sleeve, a-transition chamber. DETAILED DESCRIPTION

[0049] The known rocker arm solenoid valve composed of components such as the housing 10, the valve cover 20, the valve seat 30 and the flow path switching mechanism 40 (for example, the new sealed rocker arm solenoid valve disclosed in the patent document with application number CN2021114665814 previously applied by the applicant) is usually large in size. The reason is that components such as the housing 10, the valve cover 20 and the valve seat 30 are usually independent of each other, so it is necessary to provide a suitable assembly position by increasing the volume of the corresponding components. At the same time, since components such as the housing 10, the valve cover 20 and the valve seat 30 are independent of each other, the assembly process of the rocker arm solenoid valve is relatively cumbersome, and additional seals need to be added to achieve reliable sealing between different components, which further increases the cost of the rocker arm solenoid valve.

[0050] To do this, please refer to Figures 1 to 7 This embodiment provides a miniature rocker solenoid valve, which improves the structure and connection method of the housing 10, the valve cover 20 and the valve seat 30 on the basis of the known rocker solenoid valve, thereby minimizing the volume of the rocker solenoid valve, simplifying the assembly process of the rocker solenoid valve, and reducing the cost of the rocker solenoid valve.

[0051] Specifically, the micro rocker arm solenoid valve includes a housing 10 , a valve cover 20 , a valve seat 30 , a flow path switching mechanism 40 and a fastener 50 .

[0052] In this embodiment, combined with Figure 2 and Figure 3 As shown, the valve cover 20 is located at one end of the housing 10 and is not directly connected to the housing 10 . At this time, a receiving groove 21 with an open structure is provided on the side of the valve cover 20 facing the housing 10 .

[0053] At the same time, if Figure 2As shown, the valve seat 30 is integrally formed at one end of the housing 10 facing the valve cover 20, and a connecting portion 31 that can be embedded in the receiving groove 21 is provided on the side of the valve seat 30 facing the valve cover 20. The fastener 50 is used to connect the connecting portion 31 and the valve cover 20 when the connecting portion 31 is embedded in the receiving groove 21. In other words, the connecting portion 31 of the valve seat 30 and the valve cover 20 are detachably connected via the fastener 50.

[0054] In other embodiments, the shape of the connecting portion 31 can be adapted to the receiving groove 21, so that when the connecting portion 31 is inserted into the receiving groove 21, the outer wall of the connecting portion 31 can contact and fit with the inner wall of the receiving groove 21, thereby improving the reliability of the connection between the connecting portion 31 and the valve cover 20. At the same time, in actual implementation, the valve seat 30 and the housing 10 can be, but are not limited to, integrally molded using a plastic process.

[0055] It can be seen that the micro rocker solenoid valve provided in this embodiment sets the valve seat 30 and the outer shell 10 as an integrated structure, so that no assembly is required between the valve seat 30 and the outer shell 10, and eliminates the sealing component used in the known rocker solenoid valve to achieve reliable sealing between the valve seat 30 and the outer shell 10, thereby simplifying the assembly process of the rocker solenoid valve and reducing costs.

[0056] At the same time, by providing a connecting portion 31 on the valve seat 30 and providing a receiving groove 21 on the valve cover 20 that can accommodate the connecting portion 31, when the valve seat 30 and the valve cover 20 are assembled, the connecting portion 31 is completely accommodated in the receiving groove 21, thereby effectively reducing the volume of the entire rocker arm solenoid valve after assembly, and further simplifying the assembly process between the valve seat 30 and the valve cover 20.

[0057] On this basis, in order to facilitate the assembly between the valve seat 30 and the valve cover 20, as shown in FIG. Figure 3 As shown, in this embodiment, the valve cover 20 is provided with connection holes 22 corresponding to the fasteners 50, and the single connection hole 22 sequentially passes through the valve cover 20 adjacent to the opening of the receiving groove 21 and opposite to each other. Figure 4 As shown, a connecting groove 32 capable of being aligned with the connecting hole 22 is provided on the connecting portion 31 . Furthermore, the connecting groove 32 is a through groove provided on the outer wall of the connecting portion 31 and having an open structure.

[0058] Based on this setting, Figure 1 and Figure 6As shown, when the connecting portion 31 of the valve seat 30 is embedded in the accommodating groove 21 of the valve cover 20, the connecting hole 22 on the valve cover 20 is just aligned with the corresponding connecting groove 32 on the connecting portion 31. At this time, it is only necessary to pass the fastener 50 through the connecting hole 22 on the valve cover 20 and the connecting groove 32 on the connecting portion 31 respectively to achieve a reliable connection between the connecting portion 31 and the valve cover 20. The operation is simple and convenient. Moreover, since the connecting groove 32 on the valve seat 30 is a through groove with an open structure, it is conducive to actual processing and rapid alignment of the connecting groove 32 with the corresponding connecting hole 22.

[0059] In this embodiment, combined with Figure 6 As shown in the figure, the flow path switching mechanism 40 includes a rotating arm 41, a rotating shaft 42, a sealing diaphragm 43 and a driving assembly 44, wherein the connecting portion 31 of the valve seat 30 is provided with an active cavity 33 with an opening structure on the side facing away from the housing 10. When the connecting portion 31 is embedded in the receiving groove 21 of the valve cover 20, the active cavity 33 is communicated with the receiving groove 21. The rotating arm 41 is rotatably arranged in the active cavity 33 of the connecting portion 31 through the rotating shaft 42. The sealing diaphragm 43 with a certain elastic deformation ability is connected to the rotating arm 41, and as shown in FIG. Figure 7 As shown, a transition chamber a for buffering fluid is formed between the sealing diaphragm 43 and the valve cover 20. At this time, a normally closed end 23 and a normally open end 24 communicating with the transition chamber a are provided on the side of the valve cover 20 away from the valve seat 30.

[0060] On this basis, in order to improve the stability of the connection portion 31 of the valve seat 30 and the valve cover 20, the fastener 50 in this embodiment is a pin, and as shown in FIG. Figure 1 、 Figure 6 or Figure 7 As shown, the axis of the pin is parallel to the axis of the rotating shaft 42. Furthermore, the number of the fasteners 50 is two, and the two fasteners 50 are symmetrically arranged with the rotating shaft 42 as the center.

[0061] Further, continue to refer to Figure 6 and Figure 7 A ring-shaped bearing step 25 is also provided in the receiving groove 21 of the valve cover 20. The outer edge of the sealing diaphragm 43 is supported on the bearing step 25 and sealed with the bearing step 25, thereby ensuring good sealing performance of the transition chamber a and preventing the fluid in the transition chamber a from flowing out from the gap between the sealing diaphragm 43 and the bearing step 25.

[0062] It can be seen that by providing the bearing step 25 and sealing the outer edge of the sealing diaphragm 43 with the bearing step 25, in actual implementation, there is no need to add additional seals between the assembled valve cover 20 and the valve seat 30, which further reduces the cost of the rocker arm solenoid valve. At the same time, when the connecting portion 31 is embedded in the accommodating groove 21, the side of the connecting portion 31 facing away from the outer shell 10 can be offset against the side of the bearing step 25 facing away from the sealing diaphragm 43, thereby relying on the connecting portion 31 to support the bearing step 25, so as to improve the structural strength of the bearing step 25.

[0063] like Figure 7 As shown, in some other embodiments, a ring-shaped protrusion 26 extending toward the sealing diaphragm 43 can be provided on the side of the bearing step 25 facing the sealing diaphragm 43. Accordingly, an inner groove adapted to the protrusion 26 can be provided on the sealing diaphragm 43, and the protrusion 26 can be embedded in the inner groove. By adding the protrusion 26 on the bearing step 25 and the inner groove adapted to the protrusion 26 on the sealing diaphragm 43, the contact area between the outer edge of the sealing diaphragm 43 and the bearing step 25 can be effectively increased, thereby improving the sealing effect between the sealing diaphragm 43 and the bearing step 25 and enhancing the structural stability of the sealing diaphragm 43.

[0064] In this embodiment, the driving assembly 44 is used to drive the rotating arm 41 to rotate, so that the rotation of the rotating arm 41 drives the sealing diaphragm 43 to alternately seal the normally closed end 23 and the normally open end 24 on the valve cover 20, thereby realizing the switching of the flow path.

[0065] Specifically, assuming that in the initial state, Figure 7 As shown, the drive assembly 44 drives the rotating arm 41 to rotate counterclockwise about the rotating shaft 42 by a certain angle. At this time, the sealing diaphragm 43, driven by the rotating arm 41, seals the normally closed end 23 of the valve cover 20, allowing external fluid to enter the transition chamber a through the normally open end 24 of the valve cover 20. When the flow path needs to be switched, the drive assembly 44 drives the rotating arm 41 to rotate clockwise about the rotating shaft 42 by a certain angle. During this process, the rotating arm 41 drives the sealing diaphragm 43 to move synchronously. At this time, the sealing diaphragm 43 releases the seal on the normally closed end 23 and seals the normally open end 24, allowing the fluid buffered in the transition chamber a to flow out through the normally closed end 23. In other words, by alternately driving the rotating arm 41 counterclockwise and clockwise by the drive assembly 44, the normally closed end 23 and the normally open end 24 can be alternately sealed by the sealing diaphragm 43, thereby achieving alternating flow path switching.

[0066] On this basis, in order to realize the use of the driving assembly 44 to drive the rotating arm 41 to rotate, the driving assembly 44 used in this embodiment includes a slide 441, a first elastic member 442, a second elastic member 443, a moving iron core 444, a stop iron 445 and a coil 446.

[0067] Among them, Figure 6 or Figure 7 As shown, the valve seat 30 is provided with a sliding groove 34 in communication with the movable cavity 33 on the connecting portion 31. The slide 441 is slidably disposed in the sliding groove 34. The slide 441 is provided with a pushing portion 4411 that abuts against the rotating arm 41. At this time, the first elastic member 442 and the pushing portion 4411 are arranged relative to each other with the rotating shaft 42 as the center. One end of the first elastic member 442 is connected to the rotating arm 41, and the other end of the first elastic member 442 is connected to the slide 441. It is understood that in actual implementation, a fixing hole that cooperates with the first elastic member 442 can be provided on the slide 441, and the end of the first elastic member 442 away from the rotating arm 41 is allowed to extend into the fixing hole and then be fixedly connected to the slide 441, so that the fixing hole can play a certain guiding and limiting role on the first elastic member 442, thereby allowing the first elastic member 442 to undergo elastic deformation in the desired direction.

[0068] At the same time, the second elastic member 443 is disposed on the side of the slide 441 facing away from the rotating arm 41, and the elastic force of the second elastic member 443 is greater than the elastic force of the first elastic member 442. At this time, one end of the second elastic member 443 is connected to the slide 441, and the other end of the second elastic member 443 is connected to the valve seat 30. It is understood that the first elastic member 442 and the second elastic member 443 can be, but are not limited to, compression springs.

[0069] In addition, if Figure 6 As shown, the movable iron core 444, the coil 446, and the stop iron 445 are all disposed within the housing 10. One end of the movable iron core 444 extends into the sliding slot 34 and passes through the second elastic member 443 before being connected to the slide 441. That is, the movable iron core 444 and the second elastic member 443 are coaxially disposed, and the movable iron core 444 and the slide 441 are integrally formed. A gap is reserved between the end of the movable iron core 444 facing away from the slide 441 and the stop iron 445. The coil 446 is disposed around the movable iron core 444 and the stop iron 445. It is understood that the movable iron core 444 and the slide 441 can be, but are not limited to, integrally formed using a plastic process.

[0070] In this configuration, assuming that the initial state is that the coil 446 is not energized, Figure 7As shown, based on the elastic force of the second elastic member 443 being greater than the elastic force of the first elastic member 442, the slide 441 drives the moving iron core 444 to move synchronously in the direction of the rotating arm 41 under the elastic force of the second elastic member 443, and the pushing portion 4411 of the slide 441 pushes the rotating arm 41 so that the rotating arm 41 rotates counterclockwise around the rotating shaft 42 by a certain angle, thereby driving the sealing diaphragm 43 to seal the normally closed end 23 of the valve cover 20 through the rotating arm 41. During this process, the side of the rotating arm 41 away from the pushing portion 4411 squeezes the first elastic member 442 so that the first elastic member 442 is compressed and pre-stores a certain elastic force.

[0071] On the contrary, once the coil 446 is energized, a magnetic force will be generated between the moving iron core 444 and the stop iron 445, and the magnetic force will be greater than the elastic force of the second elastic member 443. At this time, under the action of the magnetic force, the moving iron core 444 will be attracted by the stop iron 445 and drive the slide 441 to move synchronously in the direction away from the rotating arm 41. During this process, the second elastic member 443 is compressed and pre-stores a certain elastic force, the pushing portion 4411 is disengaged from the rotating arm 41, and the first elastic member 442 releases the pre-stored elastic force to force the rotating arm 41 to rotate clockwise around the rotating shaft 42 for a certain angle, thereby driving the sealing diaphragm 43 to seal the normally open end 24 of the valve cover 20 through the rotating arm 41, thereby realizing the switching of the flow path.

[0072] It is understood that once the coil 446 is de-energized again, the magnetic force acting on the movable iron core 444 disappears, and the second elastic member 443 releases its elastic force. At this point, the slide 441, under the elastic force released by the second elastic member 443, drives the movable iron core 444 toward the direction of the rotating arm 41, thereby resealing the normally closed end 23 of the valve cover 20 and releasing the seal on the normally open end 24. This repetitive process achieves the purpose of alternately sealing the normally closed end 23 and the normally open end 24 of the valve cover 20 using the sealing diaphragm 43.

[0073] It should be noted that, by configuring the slide 441 and the movable iron core 444 as an integrated structure, this embodiment can make the dimensional chain between the slide 441 and the movable iron core 444 more accurate compared to the known rocker arm solenoid valve, thereby optimizing the dimensional chain design of the entire rocker arm solenoid valve.

[0074] In addition, continue to refer to Figure 6 In this embodiment, a protective cover 60 is further provided inside the housing 10. The movable iron core 444 and the iron stop 445 are both disposed within the protective cover 60. The movable iron core 444 and the protective cover 60 are slidably engaged to reduce friction between the movable iron core 444 and the protective cover 60 during movement. The coil 446 is adhered to the outer wall of the protective cover 60 using a self-adhesive coil.

[0075] It is understood that the addition of the protective cover 60 can effectively isolate the movable iron core 444 and the iron stop 445 from the coil 446, thereby protecting the movable iron core 444 and the iron stop 445. Furthermore, the use of a self-adhesive coil can increase the winding space for the coil 446 while reducing the gap between the coil 446 and magnetic components such as the movable iron core 444, thereby increasing the electromagnetic force generated by the coil 446 when energized. This can also eliminate the need for the frame used to secure the coil 446 in conventional rocker arm solenoid valves, further reducing the cost of the rocker arm solenoid valve and simplifying the installation process of the coil 446.

[0076] On the other hand, in order to facilitate the assembly of the coil 446 and other components inside the housing 10 and the subsequent maintenance and inspection, this embodiment further improves the structure of the housing 10. Specifically, Figure 4 As shown, the housing 10 includes a shell 11 and a protective cover 12. The shell 11 is provided with a housing 13 for accommodating the coil 446. At least one side of the housing 13 is an open structure. For example, in this embodiment, both opposite sides of the housing 13 are open structures.

[0077] In this case, the protective cover 12 is generally U-shaped and is detachably connected to the housing 11 to seal the opening of the accommodating cavity 13. Specifically, the protective cover 12 can be connected to the housing 11 by snapping. In this manner, the accommodating cavity 13 on the housing 11 can be exposed by removing the protective cover 12, thereby facilitating assembly or maintenance of the relevant components inside the housing 10.

[0078] In addition, in order to facilitate the installation of the entire rocker arm solenoid valve to the predetermined position for use, such as Figure 4 As shown, the valve seat 30 is provided with mounting portions 35 on both sides thereof, and the mounting portions 35 are provided with first mounting holes 36. Figure 3 As shown, the valve cover 20 is provided with second mounting holes 27 corresponding to the first mounting holes 36 one by one, and the first mounting holes 36 and the corresponding second mounting holes 27 are aligned.

[0079] With this arrangement, when the entire rocker arm solenoid valve needs to be installed at a predetermined position for use, it is only necessary to use fasteners such as bolts to pass through the first mounting hole 36 on the mounting portion 35 and the corresponding second mounting hole 27 on the valve cover 20 to fix the entire rocker arm solenoid valve to the predetermined position. The operation is simple and convenient.

[0080] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A micro rocker solenoid valve, characterized in that: include: shell; A valve cover is located at one end of the housing; a receiving groove with an open structure is provided on a side of the valve cover facing the housing; A valve seat is integrally formed at one end of the housing facing the valve cover; a connecting portion capable of being embedded in the accommodating groove is provided on one side of the valve seat facing the valve cover; a fastener, the fastener being used to connect the connecting portion and the valve cover when the connecting portion is embedded in the receiving groove; The valve cover is provided with connection holes corresponding to the fasteners one by one, and the connection holes sequentially penetrate the valve cover on two sides adjacent to and opposite to the opening of the accommodating groove; The connecting portion is provided with a connecting groove capable of being aligned with the connecting hole, and the connecting groove is a through groove provided on the outer wall of the connecting portion and having an open structure; When the connecting portion is embedded in the receiving groove, the fastener passes through the connecting hole on the valve cover and the connecting groove on the connecting portion respectively; Also included is a flow path switching mechanism, which includes a rotating arm, a rotating shaft, a sealing diaphragm, and a driving assembly; A movable cavity with an open structure is provided on a side of the connecting portion facing away from the housing, the rotating arm is rotatably disposed in the movable cavity via a rotating shaft, the sealing diaphragm is connected to the rotating arm and forms a transition cavity with the valve cover, and a normally closed end and a normally open end communicating with the transition cavity are provided on a side of the valve cover facing away from the valve seat; The driving assembly is used to drive the rotating arm to rotate, so as to drive the sealing diaphragm to alternately seal the normally closed end and the normally open end through the rotation of the rotating arm; An annular bearing step is provided in the receiving groove, and the outer edge of the sealing diaphragm is supported on the bearing step and sealed with the bearing step; when the connecting portion is inserted into the receiving groove, the side of the connecting portion facing away from the housing abuts against the side of the bearing step facing away from the sealing diaphragm; The driving assembly includes a slide, a first elastic member, a second elastic member, a moving iron core, a stop iron and a coil; A sliding groove communicating with the movable cavity is provided inside the valve seat, the sliding seat is slidably arranged in the sliding groove, and the sliding seat is provided with a pushing portion abutting against the rotating arm; The first elastic member and the pushing portion are arranged opposite to each other with the rotating shaft as the center, one end of the first elastic member is connected to the rotating arm, and the other end of the first elastic member is connected to the sliding seat; The second elastic member is provided on a side of the slide away from the rotating arm, the elastic force of the second elastic member is greater than the elastic force of the first elastic member, one end of the second elastic member is connected to the slide, and the other end of the second elastic member is connected to the valve seat; The movable iron core, the coil, and the iron stop are all disposed inside the housing. One end of the movable iron core extends into the sliding groove and passes through the second elastic member before being connected to the sliding seat. The movable iron core and the sliding seat are integrally formed. A gap is reserved between the end of the moving iron core facing away from the slide seat and the stop iron, and the coil is arranged around the moving iron core and the stop iron; A protective cover is provided inside the housing, the movable iron core and the stop iron are both provided in the protective cover, and the movable iron core and the protective cover are slidably engaged; The coil is a self-adhesive coil and is adhered to the outer wall of the protective cover.

2. The micro rocker solenoid valve according to claim 1, characterized in that: A ring-shaped protrusion extending toward the sealing diaphragm is provided on one side of the bearing step facing the sealing diaphragm. The sealing diaphragm is provided with an inner groove adapted to the protrusion, and the protrusion is embedded in the inner groove.

3. The micro rocker solenoid valve according to claim 1, characterized in that: The fastener is a pin, and the axis of the pin is parallel to the axis of the rotating shaft.

4. The micro rocker solenoid valve according to claim 3, characterized in that: The number of the fasteners is two, and the two fasteners are symmetrically arranged with the rotating shaft as the center.

5. The micro rocker solenoid valve according to claim 1, characterized in that: The housing includes a shell and a protective cover, the shell is provided with a housing cavity for accommodating the coil, and at least one side of the housing cavity is an open structure; The protective cover is detachably connected to the housing to seal the opening of the accommodating cavity.

6. The micro rocker solenoid valve according to claim 1, characterized in that: Mounting portions are provided on opposite sides of the valve seat, and a first mounting hole is provided on the mounting portion; The valve cover is provided with second mounting holes corresponding to the first mounting holes one by one, and the first mounting holes and the second mounting holes are aligned.

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