A fluid control solenoid valve structure

Abstract

This utility model relates to the field of solenoid valve technology, and more specifically to a fluid control solenoid valve structure, comprising at least a hydraulic component and an electromagnetic component. The hydraulic component and the electromagnetic component are fixedly connected by a flange mechanism protruding from the end of the valve sleeve assembly and bent to close the flange. The hydraulic component includes a valve sleeve assembly, a filter screen assembly, a push rod assembly, a return spring assembly, a first external sealing ring assembly, a second external sealing ring assembly, a steel ball assembly, a return spring assembly, a snap ring assembly, and a one-way valve assembly. A convex undercut mechanism is formed in the inner hole of the valve sleeve assembly through processes such as extrusion and riveting, directly pressing the flange edge of the filter screen assembly axially or adding additional parts to form a mechanical limit. This structure can directly offset the hydraulic impact force and vibration load during the operation of the solenoid valve, preventing the filter screen from loosening due to interference fit or glue aging and falling off, structurally eliminating the risk of filter screen falling off, and ensuring that impurities cannot enter the hydraulic circuit.

Description

Technical Field

[0001] This utility model relates to the field of solenoid valve technology, and more specifically to a fluid control solenoid valve structure. Background Technology

[0002] Automotive powertrains typically include an engine and an automatic transmission as the power source and transmission device. The use of a variable displacement oil pump in the engine's cooling and lubrication system has become a trend, and the variable displacement control of the oil pump is generally controlled by a solenoid valve. In existing technologies, the filter screen and valve sleeve are mostly fixed by interference fit or adhesive bonding. Interference fit is prone to loosening under long-term high-frequency hydraulic shock (especially pressure fluctuations of 0-1.6MPa under gearbox conditions), while adhesive bonding is prone to aging and failure in high-temperature oil environments above 120℃, causing the filter screen to easily fall off. Filter screen detachment allows impurities to enter the valve, causing valve core jamming, component wear, and seriously affecting the service life of the solenoid valve. In view of this, this utility model provides a fluid control solenoid valve structure. Utility Model Content

[0003] To achieve the above objectives, the present invention aims to provide a fluid control solenoid valve structure, comprising at least a hydraulic component and an electromagnetic component, wherein the hydraulic component and the electromagnetic component are fixedly connected by a flange mechanism protruding from the end of the valve sleeve assembly and bent and closed; the hydraulic component includes a valve sleeve assembly, a filter assembly, a push rod assembly, a first return spring assembly, a first external sealing ring assembly, a second external sealing ring assembly, a steel ball assembly, a second return spring assembly, a snap ring assembly, and a check valve assembly; The valve sleeve assembly is provided with an axial oil inlet chamber, a radial control oil chamber and a radial oil drain chamber. The oil inlet chamber is provided with an oil inlet mechanism in the axial direction. The filter screen assembly is installed between the oil inlet mechanism and the oil inlet chamber. The inner hole of the valve sleeve assembly is formed with a protruding buckle mechanism by means of extrusion, riveting, adding parts and extrusion and riveting after adding parts, which is used to fix the filter screen assembly. The wall of the control oil chamber is provided with an oil control port that is in contact with the external environment. The oil inlet chamber is provided with a steel ball assembly and a return spring assembly. The return spring assembly is supported on the surface of the steel ball assembly and is used for the return of the steel ball assembly. The wall of the oil drain chamber is provided with an oil drain port that is in contact with the external environment. The oil drain chamber is provided with a one-way valve assembly, a return spring assembly and a push rod assembly. The return spring assembly is used to support the one-way valve assembly. The push rod assembly supports the steel ball assembly and the armature assembly at the front and rear respectively. The snap ring assembly is installed in the groove of the outer diameter of the push rod assembly. The valve sleeve assembly is provided with a first external sealing ring assembly and a second external sealing ring assembly on its exterior. The electromagnetic assembly includes a protective housing, a magnetically conductive housing assembly, a solenoid assembly, an armature assembly, a rear yoke assembly, and a front yoke assembly. The protective housing is an injection-molded structure, and the magnetically conductive housing assembly, the rear yoke assembly, the solenoid assembly, the armature assembly, and the front yoke assembly form a complete magnetic field circuit.

[0004] As a further improvement to this technical solution, the buckling mechanism is a ring-shaped structure that is connected as a whole, or a segmented structure with two or more segments that are evenly or non-uniformly distributed. The shape of the segmented structure includes square and circular.

[0005] As a further improvement to this technical solution, the edge of the filter assembly is fitted with the end face of the inverted mechanism, which is used to counteract the impact force and hydraulic pressure of the hydraulic fluid generated during the operation of the solenoid valve.

[0006] As a further improvement to this technical solution, the magnetic housing assembly, the rear yoke assembly, and the front yoke assembly are all made of magnetic material, and the front yoke assembly is fitted with the flange mechanism of the valve sleeve assembly.

[0007] As a further improvement to this technical solution, the solenoid assembly is sleeved on the outside of the armature assembly, and the protective housing is wrapped around the outside of the solenoid assembly.

[0008] As a further improvement to this technical solution, the push rod assembly is a columnar structure, with one end in contact with the steel ball assembly and the other end abutting against the armature assembly. The snap ring assembly is used to limit the axial displacement of the push rod assembly.

[0009] As a further improvement to this technical solution, the first external sealing ring assembly and the second external sealing ring assembly are located at different axial positions of the valve sleeve assembly, respectively, to achieve sealing between the valve sleeve assembly and the external mounting structure.

[0010] As a further improvement to this technical solution, the second return spring assembly is sleeved on the outside of the push rod assembly, with one end abutting against the steel ball assembly and the other end abutting against the inner wall of the oil inlet chamber, for driving the steel ball assembly to return to its original position to seal the oil inlet chamber and the control oil chamber.

[0011] As a further improvement to this technical solution, the one-way valve assembly includes a one-way valve ball and a one-way valve seat. One end of the first return spring assembly abuts against the one-way valve ball, and the other end abuts against the inner wall of the oil drain chamber, for driving the one-way valve ball to fit against the one-way valve seat to seal the oil drain chamber.

[0012] As a further improvement to this technical solution, the flange mechanism and the valve sleeve assembly are an integral structure, with protrusions distributed circumferentially along its edge for bending and closing, and the protrusions are fixed to the end of the magnetic housing assembly of the electromagnetic component.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. In this fluid control solenoid valve structure, a convex undercut mechanism is formed in the inner hole of the valve sleeve assembly through processes such as extrusion and riveting. This mechanism directly presses the flange edge of the filter assembly axially or adds additional parts to form a mechanical limit. This structure can directly offset the hydraulic impact force and vibration load during the operation of the solenoid valve, preventing the filter screen from loosening due to interference fit or glue aging and falling off. Structurally, it eliminates the risk of filter screen falling off and ensures that impurities cannot enter the hydraulic circuit.

[0014] 2. In the structure of this fluid control solenoid valve, the undercut mechanism is formed by simple mechanical extrusion / riveting, without the need for high-precision interference fit processing, welding or glue, reducing equipment investment and processes. Compared with traditional processes, the single-piece processing cost is reduced by more than 22%, and the production efficiency is increased by 35%, making it more suitable for the needs of large-scale mass production.

[0015] 3. In the structure of this fluid control solenoid valve, the undercut mechanism is processed by local cold plastic deformation to avoid thermal deformation caused by welding, ensuring stable fit clearance between the inner cavity of the valve sleeve assembly and the push rod assembly, eliminating the risk of valve core jamming. While simplifying the process, it maintains the hydraulic control accuracy of the solenoid valve and meets the control requirements of variable displacement oil pumps and gearboxes. Attached Figure Description

[0016] The present invention will now be described in more detail by way of example, with reference to the accompanying drawings, in which: Figure 1 This is a schematic diagram of the present invention.

[0017] The meanings of the labels in the diagram are as follows: 1. Oil inlet mechanism; 2. Oil inlet chamber; 3. Control oil chamber; 4. Oil drain chamber; 10. Hydraulic assembly; 11. Valve sleeve assembly; 12. Filter screen assembly; 13. Push rod assembly; 14. First return spring assembly; 15. First external sealing ring assembly; 16. Second external sealing ring assembly; 17. Steel ball assembly; 18. Second return spring assembly; 19. Snap ring assembly; 20. Electromagnetic assembly; 21. Protective housing; 22. Magnetic housing assembly; 23. Solenoid assembly; 24. Armature assembly; 25. Rear yoke sleeve assembly; 26. Front yoke sleeve assembly; 31. Check valve assembly; 50. Flange mechanism. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] Please see Figure 1 As shown, the purpose of this embodiment is to provide a fluid control solenoid valve structure, which includes at least a hydraulic component 10 and a solenoid component 20. The hydraulic component 10 and the solenoid component 20 are fixedly connected by a flange mechanism 50 protruding from the end of the valve sleeve assembly 11. The hydraulic component 10 includes a valve sleeve assembly 11, a filter screen assembly 12, a push rod assembly 13, a first return spring assembly 14, a first external sealing ring assembly 15, a second external sealing ring assembly 16, a steel ball assembly 17, a second return spring assembly 18, a snap ring assembly 19, and a one-way valve assembly 31. The valve sleeve assembly 11 is provided with an axial oil inlet chamber 2, a radial control oil chamber 3 and a radial oil drain chamber 4. The oil inlet chamber 2 is provided with an oil inlet mechanism 1 in the axial direction. The filter screen assembly 12 is installed between the oil inlet mechanism 1 and the oil inlet chamber 2. The inner hole of the valve sleeve assembly 11 is formed by extrusion, riveting, adding parts and extrusion and riveting after adding parts to form a protruding buckle mechanism for fixing the filter screen assembly 12. The wall of the control oil chamber 3 is provided with an oil control port that is in contact with the external environment. The oil inlet chamber 2 is provided with a steel ball assembly 17 and a second return spring assembly 18. The second return spring assembly 18 is supported on the surface of the steel ball assembly 17 and is used for the return of the steel ball assembly 17. The wall of the oil drain chamber 4 is provided with an oil drain port that is in contact with the external environment. The oil drain chamber 4 is provided with a one-way valve assembly 31, a first return spring assembly 14 and a push rod assembly 13. The first return spring assembly 14 is used to support the one-way valve assembly 31. The push rod assembly 13 supports the steel ball assembly 17 and the armature assembly 24 at the front and rear respectively. The snap ring assembly 19 is installed in the groove of the outer diameter of the push rod assembly 13. The valve sleeve assembly 11 is provided with a first external sealing ring assembly 15 and a second external sealing ring assembly 16 on its exterior. The electromagnetic component 20 includes a protective housing 21, a magnetic housing component 22, a solenoid component 23, an armature component 24, a rear yoke component 25, and a front yoke component 26. The protective housing 21 is an injection-molded structure. The magnetic housing component 22, the rear yoke component 25, the solenoid component 23, the armature component 24, and the front yoke component 26 form a complete magnetic field circuit.

[0022] The inverted mechanism is a continuous ring-shaped structure, or a segmented structure consisting of two or more segments that are evenly or non-uniformly distributed. The shape of the segmented structure includes square and circular.

[0023] The edge of the filter assembly 12 fits against the end face of the inverted mechanism, which is used to counteract the impact force and hydraulic pressure of the hydraulic fluid generated during the operation of the solenoid valve.

[0024] The magnetic housing assembly 22, the rear yoke assembly 25, and the front yoke assembly 26 are all made of magnetic material, and the front yoke assembly 26 is fitted with the flange mechanism 50 of the valve sleeve assembly 11.

[0025] The solenoid assembly 23 is sleeved on the outside of the armature assembly 24, and the protective housing 21 is wrapped around the outside of the solenoid assembly 23.

[0026] The push rod assembly 13 is a columnar structure, with one end in contact with the steel ball assembly 17 and the other end abutting against the armature assembly 24. The snap ring assembly 19 is used to limit the axial displacement of the push rod assembly 13.

[0027] The first external sealing ring assembly 15 and the second external sealing ring assembly 16 are located at different axial positions of the valve sleeve assembly 11, respectively, to achieve sealing between the valve sleeve assembly 11 and the external mounting structure.

[0028] The second return spring assembly 18 is sleeved on the outside of the push rod assembly 13. One end of it abuts against the steel ball assembly 17, and the other end abuts against the inner wall of the oil inlet chamber 2. It is used to drive the steel ball assembly 17 to return to its original position to seal the oil inlet chamber 2 and the control oil chamber 3.

[0029] The one-way valve assembly 31 includes a one-way valve ball and a one-way valve seat. One end of the first return spring assembly 14 abuts against the one-way valve ball, and the other end abuts against the inner wall of the oil drain chamber 4, for driving the one-way valve ball to fit against the one-way valve seat to seal the oil drain chamber 4.

[0030] The flange mechanism 50 and the valve sleeve assembly 11 are an integral structure, and its edge has protrusions distributed circumferentially for bending and closing. The protrusions are fixed to the end of the magnetic housing assembly 22 of the electromagnetic assembly 20.

[0031] Hydraulic component 10 assembly: The filter screen assembly 12 is press-fitted into the oil inlet mechanism 1 and fixed by the four riveting protrusions in the inner hole of the valve sleeve assembly 11; The second return spring assembly 18 and the steel ball assembly 17 are sequentially installed into the oil inlet chamber 2, the push rod assembly 13 is inserted into the inner hole of the valve sleeve assembly 11, and the snap ring assembly 19 is embedded in the push rod groove. One-way valve assembly 31 and first return spring assembly 14 are installed in oil drain chamber 4, and first external sealing ring assembly 15 and second external sealing ring assembly 16 are embedded in the outer groove of valve sleeve.

[0032] Electromagnetic component 20 assembly: Solenoid assembly 23 is press-fitted into protective housing 21, armature assembly 24 is placed into magnetic housing assembly 22, and rear yoke assembly 25 is press-fitted to the end of magnetic housing; The front yoke assembly 26 is sleeved on the outside of the flange mechanism 50 of the valve sleeve assembly 11, and the protective housing 21 and the magnetic housing assembly 22 are fixed with an interference fit clearance of -0.02mm.

[0033] Overall connection: The hydraulic component 10 docks with the electromagnetic component 20, so that the push rod component 13 abuts against the armature component 24. The four protrusions of the flange mechanism 50 are fixed to the end of the magnetic housing component 22 by stamping and bending, forming a rigid connection.

[0034] The working principle is as follows: Initial state power failure: The second return spring assembly 18 pushes the steel ball assembly 17 to fit against the valve seat of the oil inlet chamber 2, sealing the passage between the oil inlet chamber 2 and the control oil chamber 3; The first return spring assembly 14 pushes the one-way valve assembly 31 to close the oil drain chamber 4, and the filter assembly 12 remains fixed under the limit of the inverted mechanism; Powered operation: The solenoid assembly 23 is powered by an external circuit with a voltage of 12V and a current of 1.5A, generating a magnetic field that forms a closed loop through the magnetic housing assembly 22, the rear yoke assembly 25, and the front yoke assembly 26. Under the action of electromagnetic attraction, the armature assembly 24 overcomes the elastic force of the second return spring assembly 18 and pushes the push rod assembly 13 to move to the right with a maximum stroke of 5mm. The steel ball assembly 17 is pushed open, and the oil inlet chamber 2 is connected to the control oil chamber 3. The hydraulic oil enters the control oil chamber 3 after being filtered by the filter assembly 12. At this time, the filter assembly 12 is under hydraulic impact with a maximum pressure of 1.8MPa. Due to the axial limiting effect of the buckling mechanism, it remains fixed without loosening or displacement. Power-off reset state: When the solenoid assembly 23 is de-energized, the magnetic field disappears, the second return spring assembly 18 pushes the steel ball assembly 17, the push rod assembly 13, the armature assembly 24 to reset, and the steel ball assembly 17 re-closes the oil inlet chamber 2; The residual oil in the control oil chamber 3 pushes open the one-way valve assembly 31 and is discharged through the oil drain chamber 4, completing one pressure regulation cycle.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fluid control solenoid valve structure, characterized by: It includes at least a hydraulic assembly (10) and an electromagnetic assembly (20), wherein the hydraulic assembly (10) and the electromagnetic assembly (20) are fixedly connected by a flange mechanism (50) protruding from the end of the valve sleeve assembly (11) and bent and closed; the hydraulic assembly (10) includes a valve sleeve assembly (11), a filter screen assembly (12), a push rod assembly (13), a first return spring assembly (14), a first external sealing ring assembly (15), a second external sealing ring assembly (16), a steel ball assembly (17), a second return spring assembly (18), a snap ring assembly (19), and a one-way valve assembly (31); The valve sleeve assembly (11) is provided with an axial oil inlet chamber (2), a radial control oil chamber (3) and a radial oil drain chamber (4). The oil inlet chamber (2) is provided with an oil inlet mechanism (1) in the axial direction. The filter screen assembly (12) is installed between the oil inlet mechanism (1) and the oil inlet chamber (2). The valve sleeve assembly (11) has a protruding buckle mechanism formed at the inner hole by extrusion, riveting, adding parts and extrusion and riveting after adding parts, which is used to fix the filter screen assembly (12). The wall of the control oil chamber (3) is provided with an oil control port that is connected to the external environment. The oil inlet chamber (2) is provided with a steel ball assembly (17) and a second return spring assembly (18). The second return spring assembly (18) is supported on the surface of the steel ball assembly (17) and is used for the return of the steel ball assembly (17). The wall of the oil drain chamber (4) is provided with an oil drain port that is connected to the external environment. The oil drain chamber (4) is provided with a one-way valve assembly (31), a first return spring assembly (14) and a push rod assembly (13). The first return spring assembly (14) is used to support the one-way valve assembly (31). The push rod assembly (13) supports the steel ball assembly (17) and the armature assembly (24) at the front and rear respectively. The snap ring assembly (19) is installed in the groove of the outer diameter of the push rod assembly (13). The valve sleeve assembly (11) is provided with a first external sealing ring assembly (15) and a second external sealing ring assembly (16) on its exterior. The electromagnetic component (20) includes a protective housing (21), a magnetic housing component (22), a solenoid component (23), an armature component (24), a rear yoke component (25), and a front yoke component (26). The protective housing (21) is an injection-molded structure. The magnetic housing component (22), the rear yoke component (25), the solenoid component (23), the armature component (24), and the front yoke component (26) form a complete magnetic field circuit.

2. The fluid control solenoid valve structure of claim 1, wherein: The inverted buckle mechanism is a continuous ring-shaped structure, or a segmented structure consisting of two or more segments that are evenly or non-uniformly distributed. The shape of the segmented structure includes square and circular.

3. The fluid control solenoid valve structure of claim 1, wherein: The edge of the filter assembly (12) is fitted with the end face of the buckling mechanism, which is used to counteract the impact force and hydraulic pressure of the hydraulic fluid generated during the operation of the solenoid valve.

4. The fluid control solenoid valve structure of claim 1, wherein: The magnetic housing assembly (22), the rear yoke assembly (25) and the front yoke assembly (26) are all made of magnetic material, and the front yoke assembly (26) is fitted with the flange mechanism (50) of the valve sleeve assembly (11).

5. The fluid control solenoid valve structure of claim 1, wherein: The solenoid assembly (23) is sleeved on the outside of the armature assembly (24), and the protective housing (21) is wrapped around the outside of the solenoid assembly (23).

6. The fluid control solenoid valve structure of claim 1, wherein: The push rod assembly (13) is a columnar structure, with one end in contact with the steel ball assembly (17) and the other end in contact with the armature assembly (24). The snap ring assembly (19) is used to limit the axial displacement of the push rod assembly (13).

7. The fluid control solenoid valve structure of claim 1, wherein: The first external sealing ring assembly (15) and the second external sealing ring assembly (16) are located at different axial positions of the valve sleeve assembly (11) to achieve sealing between the valve sleeve assembly (11) and the external mounting structure.

8. The fluid control solenoid valve structure of claim 1, wherein: The second return spring assembly (18) is sleeved on the outside of the push rod assembly (13), with one end abutting against the steel ball assembly (17) and the other end abutting against the inner wall of the oil inlet chamber (2), for driving the steel ball assembly (17) to return to its original position to seal the oil inlet chamber (2) and the control oil chamber (3).

9. The fluid control solenoid valve structure of claim 1, wherein: The one-way valve assembly (31) includes a one-way valve ball and a one-way valve seat. One end of the first return spring assembly (14) abuts against the one-way valve ball, and the other end abuts against the inner wall of the drain chamber (4), which is used to drive the one-way valve ball to fit against the one-way valve seat to seal the drain chamber (4).

10. The fluid control solenoid valve structure of claim 1, wherein: The flange mechanism (50) and the valve sleeve assembly (11) are an integral structure, with protrusions for bending and closing distributed circumferentially along its edge. The protrusions are fixed to the end of the magnetic housing assembly (22) of the electromagnetic assembly (20).

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