Check valve for engine oil control valve

Abstract

The invention relates to the technical field of one-way valve structures, in particular to a check valve for an engine oil control valve. The check valve comprises a first shell, a valve body, a valve seat and a second shell. The first shell is provided with a first channel, a limiting protrusion is arranged on the first shell, and a buckle female end is further arranged on the first shell. The valve body is configured to be of a sheet-shaped structure, a plurality of elastic arms which are evenly distributed in the circumferential direction are arranged on the valve body in a derived mode in the radial direction, first positioning parts are arranged on the elastic arms, and the middle of the valve body protrudes outwards so that a blocking protrusion and a limiting groove can be formed on the two sides of the valve body respectively. The valve seat is provided with a second channel; the second shell is provided with a third channel and a connecting part, and the second shell is provided with a second positioning part and a buckle male end; when the elastic arm is in a natural state, the blocking protrusion blocks the second channel. The check valve is relatively simple in structure and easy to assemble, the valve body is not prone to abrasion and deformation in the using process, and the risk of reverse leakage of the check valve can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of one-way valve structures, and in particular to a check valve for an oil control valve. Background Art

[0002] The check valve in the prior art is usually composed of a steel ball, a spring, a spring seat, a plastic valve body and a valve seat. The steel ball is connected to the spring seat through a coil spring, and the valve seat is connected to the plastic valve body. The steel ball is located in the plastic valve body and blocks the valve seat through the guiding effect of the plastic valve body and the elastic force of the coil spring. When in use, the steel ball will form multiple collisions in the process of blocking the valve seat, which is prone to wear and deformation, resulting in reverse leakage. At the same time, the existing check valve has a high manufacturing cost due to its complex structure and many assembly processes. Summary of the invention

[0003] The present application provides a check valve for an oil control valve, which provides elastic force to the valve body through the elastic deformation of an elastic arm and drives the valve body to seal the valve seat. The force of the impact on the valve seat is relatively reduced, thereby reducing the mutual wear between the valve body and the valve seat and avoiding reverse leakage. At the same time, the check valve structure and assembly process are simplified, thereby solving the problem of high manufacturing cost of existing check valves.

[0004] This application is implemented through the following technical solutions:

[0005] A check valve for an oil control valve, comprising:

[0006] A first shell, wherein the first shell has a first channel and a limiting protrusion is configured on the first shell, and a buckle female end is also provided on the first shell;

[0007] The valve body is configured as a sheet structure, and the valve body is radially derived from a plurality of elastic arms uniformly distributed in the circumferential direction, and a first positioning portion is configured on the elastic arm, wherein the middle portion of the valve body protrudes outwardly to form a blocking protrusion on one side of the valve body, and a limiting groove capable of generating a contact area with the limiting protrusion is formed on the other side;

[0008] A valve seat, the valve seat having a second channel capable of communicating with the first channel, wherein one end of the second channel is configured as an arc surface adapted to the surface of the blocking protrusion;

[0009] A second housing, wherein the second housing has a third channel communicating with the second channel and a connecting portion capable of forming a sealing connection with the valve seat, and the second housing is provided with a second positioning portion capable of cooperating with the first positioning portion, and is provided with a buckle male end capable of forming a buckle connection with the buckle female end;

[0010] Wherein, the blocking protrusion blocks the second channel under the action of the elastic force provided by the elastic arm (2b).

[0011] The check valve for an oil control valve provided in the present application, after the oil enters from the third channel on the second housing, the higher hydraulic pressure of the oil forces multiple elastic arms to undergo elastic deformation at the same time, the valve body disengages from the second channel and conflicts with the limiting protrusion to avoid permanent deformation of the elastic arms under the pressure of the oil, so that the second channel is connected to the first channel to allow the oil to flow, and when the hydraulic pressure of the oil is reduced or the supply of the oil is stopped, the valve body approaches the valve seat under the elastic action of the elastic arm and relies on the elastic force provided by the elastic arm to form a blockage on the valve seat, thereby blocking the oil flow to achieve a check effect.

[0012] The check valve for oil control valve provided by the present application, compared with the commonly used check valve for oil control valve, realizes the sealing of the valve body to the valve seat through the elastic deformation of multiple circumferentially uniformly distributed elastic arms, and the valve body is configured as a sheet structure with relatively small gravity. During the sealing process, the valve body has a stable movement direction driven by the multiple elastic arms, and there is no need to configure a guide structure for the valve body separately, and the structural complexity is relatively reduced. When the valve body contacts the valve seat, the sealing protrusion and the arc surface can contact in a tangential manner, the vibration generated by the valve body is smaller, and the valve body and the valve seat are not prone to mutual wear and deformation. The valve body and the valve seat have long-term good sealing performance, ensuring that the check valve has a long-term good check effect; at the same time, the valve body is matched with the second positioning portion on the second shell through the first positioning portion, and the second shell and the first shell are snap-fitted by a buckle matching method. Compared with the existing check valve, there are fewer assembly steps, especially compared with the guide structure of the steel ball in the existing check valve, the assembly accuracy requirement is relatively low, thereby reducing the overall manufacturing cost of the check valve.

[0013] In some optional embodiments, the first positioning portion is configured as a positioning hole, and the second positioning portion is configured as a positioning protrusion adapted to the positioning hole;

[0014] Wherein, a positioning groove adapted to the positioning boss is constructed on the first shell, so that the elastic arm is pressed between the first shell and the second shell.

[0015] In some optional embodiments, the positioning groove extends axially to form a through hole communicating with the first channel.

[0016] In some optional embodiments, the first channel is arranged around the length direction of the limiting protrusion, wherein, in the length direction of the limiting protrusion, the limiting protrusion is closer to the valve body than the first channel.

[0017] In some optional embodiments, the elastic arm corresponds to the position of the first channel in the circumferential direction around the length of the limiting protrusion.

[0018] In some optional embodiments, the end of the limiting protrusion is adapted to the shape of the limiting groove, wherein the limiting groove is configured as a spherical groove.

[0019] In some optional embodiments, the blocking protrusion is configured as a spherical protrusion and the edge of the second channel is configured as a rounded structure.

[0020] In some optional embodiments, the elastic arm is connected to an edge of the limiting groove, wherein the junction between the elastic arm and the limiting groove is constructed as a smooth transition structure.

[0021] In some optional embodiments, the second shell is sealed with the valve seat by injection molding, wherein a positioning notch is configured on an edge of the valve seat so that the second shell forms a circumferential limit on the valve seat.

[0022] In some optional embodiments, a snap-fitting boss extends from the second shell to form a snap-fitting male end, a snap-fitting boss is provided with a snap-fitting slot, and a guide wedge surface is also provided at the end of the snap-fitting boss; a snap-fitting block adapted to the shape of the snap-fitting slot is provided on the first shell, and the snap-fitting block enters the snap-fitting slot under the guidance of the guide wedge surface to form a snap connection.

[0023] Compared with the prior art, this application has the following advantages and beneficial effects:

[0024] 1. The check valve for an oil control valve provided by the present application, compared with the commonly used check valve for an oil control valve, realizes the sealing of the valve body to the valve seat through the elastic deformation of multiple circumferentially uniformly distributed elastic arms, and the valve body is configured as a sheet structure with relatively small gravity. During the sealing process, the valve body has a stable movement direction driven by the multiple elastic arms, and there is no need to configure a guide structure for the valve body separately, so the structural complexity is relatively reduced. When the valve body contacts the valve seat, the sealing protrusion and the arc surface can contact in a tangential manner, so the vibration generated by the valve body is smaller, and the valve The body and the valve seat are not prone to mutual wear and deformation, and the valve body and the valve seat have long-term good sealing performance, ensuring that the check valve has a long-term good non-return effect; at the same time, the valve body is matched with the second positioning part on the second shell through the first positioning part, and the second shell and the first shell are snap-fitted together. Compared with the existing check valve, the assembly process is fewer, especially compared with the guide structure of the steel ball in the existing check valve, the assembly accuracy requirement is relatively low, thereby reducing the overall production cost of the check valve.

[0025] 2. The check valve for the oil control valve provided in the present application is not only suitable for oil control, but also suitable for control of other liquid fluid media besides oil, and also suitable for control of gaseous media. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present application and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0027] Figure 1 A schematic diagram of the structure of a check valve for an oil control valve provided in an embodiment of the present application;

[0028] Figure 2 A schematic diagram of the first shell structure provided in an embodiment of the present application;

[0029] Figure 3 A schematic diagram of the valve body structure provided in an embodiment of the present application;

[0030] Figure 4 A schematic diagram of the valve seat structure provided in an embodiment of the present application;

[0031] Figure 5 A schematic diagram of the second housing structure provided in an embodiment of the present application;

[0032] Figure 6 A schematic diagram of the structure of the fully-on state of the oil control valve provided in an embodiment of the present application;

[0033] Figure 7 A schematic diagram of the check state structure of an oil control valve provided in an embodiment of the present application.

[0034] Marks and corresponding parts names in the attached drawings:

[0035] 1-first shell, 1a-limiting protrusion, 1b-snapping female end, 1c-positioning groove, 1d-first channel, 2-valve body, 2a-blocking protrusion, 2b-elastic arm, 2c-first positioning part, 2d-limiting groove, 3-valve seat, 3a-arc surface, 3b-positioning notch, 3c-second channel, 4-second shell, 4a-snapping male end, 4b-second positioning part, 4c-third channel, 4d-connecting part. DETAILED DESCRIPTION

[0036] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with examples and drawings. The illustrative implementation scheme of the present application and its description are only used to explain the present application and are not intended to limit the present application.

[0037] Firstly, the existing check valve for oil control is introduced in detail. The spring seat in the existing check valve is sealed and connected to the plastic valve body, and the spring is fixedly assembled in the spring seat. During the assembly process, the assembly accuracy of the spring needs to be guaranteed to ensure that the direction of the elastic force provided by the spring is accurate and the elastic force is stable, which requires a high manufacturing accuracy of the spring seat. The plastic valve body not only serves as the oil passage of the check valve, but also has a guide structure therein to guide the steel ball, thereby ensuring the correct movement direction of the steel ball. This requires strict assembly accuracy between the plastic valve body and the steel ball. On the one hand, it is necessary to ensure that the guide structure on the plastic valve body can successfully perform the guide function, and on the other hand, it is necessary to avoid wear of the steel ball and the plastic valve body, which will put forward quite high processing requirements for the plastic valve body and greatly increase the production cost. Of course, after long-term use, the steel ball and the guide structure in the plastic valve body will inevitably wear. At this time, under hydraulic shock, the movement state of the steel ball is unstable, which may cause the check valve to respond untimely or uncontrollably. At the same time, the steel ball contacts the valve seat driven by the spring to form a blockage, which is easy to vibrate, so that the steel ball and the valve seat form multiple collisions, and the risk of wear and deformation is high, which is easy to cause reverse leakage of the check valve.

[0038] The existing check valve has high manufacturing cost and may cause reverse leakage after long-term use. Figure 1 to Figure 7 The embodiment of the present application provides a check valve for an oil control valve, the check valve for an oil control valve comprising a first housing 1, a valve body 2, a valve seat 3 and a second housing 4; the first housing 1 has a first channel 1d and a limiting protrusion 1a is configured on the first housing 1, and a buckle female end 1b is also provided on the first housing 1; the valve body 2 is configured as a sheet structure, and the valve body 2 is radially derived from a plurality of elastic arms 2b uniformly distributed in the circumferential direction, and a first positioning portion 2c is configured on the elastic arm 2b, wherein the middle portion of the valve body 2 protrudes outwardly so that a blocking protrusion 2a is formed on one side of the valve body 2, and a stopper 2a that can produce a stopper with the limiting protrusion 1a is formed on the other side. The valve seat 3 has a second channel 3c that can communicate with the first channel 1d, and one end of the second channel 3c is constructed as an arc surface 3a that adapts to the surface of the blocking protrusion 2a; the second shell 4 has a third channel 4c that communicates with the second channel 3c and a connecting portion 4d that can form a sealed connection with the valve seat 3, and the second shell 4 is provided with a second positioning portion 4b that can cooperate with the first positioning portion 2c, and a snap male end 4a that can be snapped with the snap female end 1b; wherein, the blocking protrusion 2a blocks the second channel 3c under the elastic force provided by the elastic arm 2b.

[0039] The check valve for an oil control valve provided in the present application, after the oil enters from the third channel 4c on the second housing 4, the higher hydraulic pressure of the oil forces multiple elastic arms 2b to undergo elastic deformation at the same time, and the valve body 2 disengages from the second channel 3c and conflicts with the limiting protrusion 1a to prevent the elastic arms 2b from undergoing permanent deformation under the pressure of the oil, so that the second channel 3c is connected to the first channel 1d to allow the oil to flow, and when the hydraulic pressure of the oil is reduced or the supply of the oil is stopped, the valve body 2 approaches the valve seat 3 under the elastic action of the elastic arms 2b and forms a blockage on the valve seat 3, thereby blocking the flow of the oil to achieve a check effect.

[0040] Compared with the commonly used check valves for oil control valves, the check valve for oil control valves provided by the present application realizes the blocking of the valve body 2 to the valve seat 3 through the elastic deformation of multiple circumferentially uniformly distributed elastic arms 2b, and the valve body 2 is configured as a sheet structure with relatively small gravity. During the blocking process, the valve body 2 has a stable movement direction driven by the multiple elastic arms 2b, and there is no need to configure a guide structure for the valve body 2 separately, so the structural complexity is relatively reduced. When the valve body 2 contacts the valve seat 3, the blocking protrusion 2a and the arc surface 3a can contact in a tangential manner, and the vibration generated by the valve body 2 is smaller. The valve body 2 and the valve seat 3 are not prone to mutual wear and deformation, and the valve body 2 and the valve seat 3 have long-term good sealing performance, ensuring that the check valve has a long-term good check effect; at the same time, the valve body 2 is matched with the second positioning portion 4b on the second shell 4 through the first positioning portion 2c, and the second shell 4 and the first shell 1 are snap-fitted. Compared with the existing check valve, the assembly process is fewer, especially compared with the guide structure of the steel ball in the existing check valve, the assembly accuracy requirement is relatively low, thereby reducing the overall production cost of the check valve.

[0041] In the embodiment of the present application, the material of the first shell 1 can be plastic to reduce the manufacturing cost. The overall shape of the first shell 1 is similar to a cylinder, and both ends of the first shell 1 are annular planes. In other embodiments, the first shell 1 can also be made of other materials besides plastic, such as steel to improve the structural strength of the first shell 1; the shapes of the blocking protrusion 2a and the limiting groove 2d on the valve body 2 are not necessarily the same, that is, during the manufacturing process of the valve body 2, before the middle part protrudes outward, the two sides of the valve body 2 may not be planes, so the shapes of the limiting groove 2d and the blocking protrusion 2a are independent of each other, and the limiting groove 2 d can be any shape that can produce a contact area with the limiting protrusion 1a, and the blocking protrusion 2a can be any shape that can form a blockage on the second channel 3c. For the convenience of manufacturing, the limiting groove 2d and the blocking protrusion 2a have the same shape, which means that the shape of the blocking protrusion 2a depends on the recessed form and size of the limiting groove 2d; the material of the valve seat 3 can be made of steel to ensure that it has excellent impact resistance; the overall shape of the second shell 4 is similar to a cylinder, and the material of the second shell 4 can be plastic to reduce the manufacturing cost. At the same time, it is the same or similar to the material of the first shell 1, which can achieve a better clamping effect.

[0042] In some optional embodiments, the first positioning portion 2c is constructed as a positioning hole, and the second positioning portion 4b is constructed as a positioning convex column adapted to the positioning hole, so that the elastic arm 2b can be assembled with the second shell 4 by means of a latch, which will help to ensure that the elastic arm 2b has a high positioning accuracy. In actual implementation, the positioning hole is constructed as a circular hole and the positioning convex column is constructed as a cylinder, so that when the valve body 2 is subjected to force and causes the elastic arm 2b to elastically deform, the construction of the circular hole and the cylinder can quickly disperse the stress, avoiding local stress concentration and causing structural damage. bad phenomenon; wherein, a positioning groove 1c adapted to the positioning boss is constructed on the first shell 1, so that the elastic arm 2b is crimped between the first shell 1 and the second shell 4, thereby preventing the elastic arm 2b from moving along the length direction of the second positioning portion 4b, which is conducive to further ensuring the positioning accuracy of the elastic arm 2b, so that in the process of the valve body 2 being pushed open, the elastic arm 2b has a higher degree of synchronization when it is deformed, the elastic force on the valve body 2 is more stable, the movement direction of the valve body 2 is more stable, and it will not form relative sliding with the edge of the second channel 3c to cause wear.

[0043] In some optional embodiments, the positioning groove 1c extends axially to form a through hole connected to the first channel 1d. Compared with the conventional groove structure, the machining accuracy of the through hole is easier to ensure, that is, it can be machined from both ends of the through hole axially, which makes it easier to ensure the centering accuracy. Even if a small deviation occurs during the machining process, it can be corrected by machining from the other end with a tool.

[0044] In some optional embodiments, the first channel 1d is arranged around the length direction of the limiting protrusion 1a, wherein in the length direction of the limiting protrusion 1a, the limiting protrusion 1a is closer to the valve body 2 than the first channel 1d, which means that after the valve body 2 conflicts with the limiting protrusion 1a, in the length direction of the limiting protrusion 1a, the valve body 2 is closer to the second channel 3c relative to the first channel 1d. In this way, in the initial stage of the check valve being turned on, the valve body 2 can form a certain flow blocking effect on the engine oil in the second channel 3c, prevent the flow instability caused by instantaneous flow fluctuations in the first channel 1d, reduce the vibration of the check valve, and make the system's response to flow control or valve manipulation smoother, which helps to improve the control accuracy of the system and reduce violent fluctuations in the control process. At the same time, the valve body 2 can reduce the impact force of the engine oil in the second channel 3c and can also reduce the generation of noise to a certain extent.

[0045] In some optional embodiments, the elastic arm 2b corresponds to the first channel 1d in the circumferential direction around the length of the limiting protrusion 1a. In this way, the elastic arm 2b can further play a certain role in blocking the flow and slow down the impact of the oil. At the same time, the elastic arm 2b can also play a certain degree of diversion to prevent the oil from instantly filling the second channel 3c and causing possible flow instability.

[0046] In some optional embodiments, the end of the limiting protrusion 1a is adapted to the shape of the limiting groove 2d, wherein the limiting groove 2d is constructed as a spherical groove, so that a larger contact area is formed between the limiting protrusion 1a and the limiting groove 2d, and at the same time, at the moment of contact, the spherical groove and the spherical end can quickly disperse the impact to avoid repeated contact between the valve body 2 and the limiting protrusion 1a. After the check valve is fully turned on, a larger pressure difference will be formed on both sides of the valve body 2, which will be beneficial to ensuring the state stability of the valve body 2. At the same time, the hydraulic requirements for the check valve to maintain conduction are reduced, and it can be applied to more control occasions; on the other hand, according to the foregoing, when the limiting groove 2d is constructed as a spherical groove, the blocking protrusion 2a will form a spherical protrusion. Since the blocking protrusion 2a is closer to the second channel 3c than the first channel 1d, the second channel After the engine oil is supplied through 3c, the sealing protrusion 2a can play a certain role in guiding the engine oil through its smooth surface, making the flow state of the engine oil more stable, and preventing the engine oil from colliding with the sealing protrusion 2a at a higher flow rate and generating local turbulence. At the same time, the smooth surface on the sealing protrusion 2a can quickly disperse the impact, and the sealing protrusion 2a is more evenly stressed, so that the deformation process of multiple elastic arms 2b has a high degree of synchronization, which means that the elastic force of the sealing protrusion 2a from the elastic arm 2b is more balanced and stable; in addition, when the limiting groove 2d is a spherical groove, the valve body 2 will also produce a certain elastic contraction during the conduction process of the check valve. In this way, when the check valve is closed, the valve body 2 can quickly block the valve seat 3 through the combined effect of the elastic arm 2b and the elastic relaxation of the valve body 2, thereby ensuring that the check valve has a high response speed.

[0047] Preferably, when the blocking protrusion 2a is a spherical protrusion, the arc surface 3a on the second channel 3c cooperates with the smooth surface of the blocking protrusion 2a to achieve better tangential blocking, ensuring that the blocking protrusion 2a has a better blocking effect on the second channel 3c, thereby ensuring the non-return effect of the check valve; at the same time, in this structural state, the contact area between the limiting protrusion 1a and the second channel 3c is large, and the contact state is relatively stable, especially in the process of contact between the blocking protrusion 2a and the arc surface 3a, it is not easy to generate large vibrations, and can quickly play a non-return role.

[0048] In some optional embodiments, the elastic arm 2b is connected to the edge of the limiting groove 2d, wherein the junction between the elastic arm 2b and the limiting groove 2d is constructed as a smooth transition structure, which means that the structure on the valve body 2 except the elastic arm 2b is in the shape of a spherical shell, that is, the edge of the limiting groove 2d is circular and there is no sharp edge, which will be beneficial to disperse the stress and prevent structural deformation or structural failure under high-intensity impact. At the same time, the smooth transition structure between the elastic arm 2b and the edge of the limiting groove 2d can also effectively disperse the stress generated during the deformation of the elastic arm 2b and avoid structural failure.

[0049] In some optional embodiments, the second shell 4 forms a sealing fit with the valve seat 3 by injection molding, that is, during the injection molding manufacturing process of the second shell 4, the second shell 4 is arranged in the injection mold, and when the second shell 4 is injection molded, the valve seat 3 is located in the third channel 4c on the second shell 4, so that the sealing between the second shell 4 and the valve seat 3 can be ensured, and at the same time, the valve seat 3 and the second shell 4 form a subassembly, which can reduce the assembly work of the check valve and simplify the assembly process, that is, the entire check valve only includes three parts, the first shell 1, the valve body 2, the second shell 4 and the valve seat 3 to form a subassembly, and the assembly difficulty is greatly reduced, wherein the edge of the valve seat 3 is constructed with a positioning notch 3b, and the positioning notch 3b can play a circumferential limiting role on the valve seat 3 after cooperating with the second shell 4 structure, thereby avoiding mutual wear between the valve seat 3 and the second shell 4, and ensuring the sealing performance between the second shell 4 and the valve seat 3.

[0050] It can be understood that after the second shell 4 is injection molded, the structure on the second shell 4 that is adapted to the edge of the valve seat 3 serves as the connecting portion 4d.

[0051] In some optional embodiments, a snap-fitting boss extends from the second shell 4 to form a snap-fitting male end 4a. Specifically, the second shell 4 may include a cylindrical portion, the inner hole of the cylindrical portion serves as a third channel 4c, and a snap-fitting boss extends from the end face of one axial end of the cylindrical portion. The number of the snap-fitting bosses is four and is evenly distributed along the circumference of the cylindrical portion. A snap-fitting groove is provided on the snap-fitting boss close to the axial side of the cylindrical portion, wherein the end face of the cylindrical portion serves as a side wall of the snap-fitting groove, and a guide wedge surface is also provided at the end of the snap-fitting boss; a snap-fitting block adapted to the shape of the snap-fitting groove is provided on the first shell 1, and the number of the snap-fitting blocks is the same as the number of the snap-fitting bosses. The snap-fitting block enters the snap-fitting groove under the guidance of the guide wedge surface to form a snap-fitting connection. Specifically, during the snap-fitting process, when the snap-fitting block contacts the guide wedge surface, the snap-fitting protrusion is forced to elastically deform under the extrusion of the snap-fitting block, and when the snap-fitting block is located in the snap-fitting groove, the snap-fitting protrusion returns to its original state, and the side wall of the snap-fitting groove and the end face of the cylindrical portion form a limit for the snap-fitting block, and the snap-fitting is completed. Of course, a sealing layer is provided on the end surface of the first shell 1 and / or the second shell 4 to ensure the sealing performance between the first shell 1 and the second shell 4 .

[0052] The above specific embodiments illustrate the implementation methods of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Although the description of the present application will be introduced in conjunction with some embodiments, this does not mean that the features of this application are limited to the implementation methods. On the contrary, the purpose of introducing the application in conjunction with the implementation methods is to cover other options or modifications that may be extended based on the claims of the present application. In order to provide an in-depth understanding of the present application, the above description contains many specific details. The present application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0053] It should be noted that in this specification, similar numbers and letters represent similar items in the above drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of this application, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A check valve for an oil control valve, characterized in that: include: A first shell (1), the first shell (1) having a first channel (1d) and a limiting protrusion (1a) is constructed on the first shell (1), and the first shell (1) is also provided with a buckle female end (1b); A valve body (2), the valve body (2) being configured as a sheet structure, the valve body (2) being radially derived with a plurality of elastic arms (2b) uniformly distributed in the circumferential direction, the elastic arms (2b) being configured with a first positioning portion (2c), wherein the middle portion of the valve body (2) protrudes outwardly so that a blocking protrusion (2a) is formed on one side of the valve body (2), and a limiting groove (2d) capable of generating a contact area with the limiting protrusion (1a) is formed on the other side; A valve seat (3), the valve seat (3) having a second channel (3c) capable of communicating with the first channel (1d), one end of the second channel (3c) being configured as an arc surface (3a) adapted to the surface of the blocking protrusion (2a); a second housing (4), the second housing (4) having a third channel (4c) communicating with the second channel (3c) and a connecting portion (4d) capable of forming a sealed connection with the valve seat (3), the second housing (4) being provided with a second positioning portion (4b) capable of cooperating with the first positioning portion (2c), and being provided with a snap-fit ​​male end (4a) capable of forming a snap-fit ​​connection with the snap-fit ​​female end (1b); Wherein, the blocking protrusion (2a) blocks the second channel (3c) under the action of the elastic force provided by the elastic arm (2b).

2. The check valve for an oil control valve according to claim 1, characterized in that: The first positioning portion (2c) is configured as a positioning hole, and the second positioning portion (4b) is configured as a positioning protrusion adapted to the positioning hole; Wherein, a positioning groove (1c) adapted to the positioning boss is constructed on the first shell (1), so that the elastic arm (2b) is pressed between the first shell (1) and the second shell (4).

3. The check valve for an oil control valve according to claim 2, characterized in that: The positioning groove (1c) extends axially to form a through hole communicating with the first channel (1d).

4. The check valve for an oil control valve according to claim 1, characterized in that: The first channel (1d) is arranged around the length direction of the limiting protrusion (1a), wherein, in the length direction of the limiting protrusion (1a), the limiting protrusion (1a) is closer to the valve body (2) than the first channel (1d).

5. The check valve for an oil control valve according to claim 4, characterized in that: In the circumferential direction around the length of the limiting protrusion (1a), the elastic arm (2b) corresponds to the position of the first channel (1d).

6. The check valve for an oil control valve according to claim 1, characterized in that: The end of the limiting protrusion (1a) is adapted in shape to the limiting groove (2d), wherein the limiting groove (2d) is configured as a spherical groove.

7. The check valve for an oil control valve according to claim 1, characterized in that: The blocking protrusion (2a) is configured as a spherical protrusion.

8. The check valve for an oil control valve according to claim 1, characterized in that: The elastic arm (2b) is connected to the edge of the limiting groove (2d), wherein the junction between the elastic arm (2b) and the limiting groove (2d) is constructed as a smooth transition structure.

9. The check valve for an oil control valve according to claim 1, characterized in that: The second shell (4) forms a sealing fit with the valve seat (3) by means of injection molding, wherein a positioning notch (3b) is configured at the edge of the valve seat (3) so that the second shell (4) forms a circumferential limit on the valve seat (3).

10. The check valve for an oil control valve according to claim 1, characterized in that: A snap-fitting protrusion extends from the second shell (4) to form a snap-fitting male end (4a), a snap-fitting protrusion is provided on the snap-fitting protrusion, and a guide wedge surface is also provided at the end of the snap-fitting protrusion; a snap-fitting block that matches the shape of the snap-fitting slot is provided on the first shell (1), and the snap-fitting block enters the snap-fitting slot under the guidance of the guide wedge surface to form a snap connection.

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