A riveting structure of a solenoid valve protection shell

Abstract

The utility model relates to the field of automobile engineering technology, more exactly relates to a solenoid valve protection shell riveting structure, at least at least including an assembly structure, and assembly structure contains coil assembly, protection shell, hydraulic assembly and electromagnetic component, coil assembly, coil assembly is integrated in electromagnetic component and sets up correspondingly solenoid, and coil assembly has at least one binding post for electrical connection, and the binding post is equipped with the protruding portion, through abandoning the adhesive bonding, the purchasing cost of adhesive is saved, simultaneously need not the dispensing equipment and solidification equipment, reduced equipment investment and maintenance cost, also reduced manual operation cost, greatly reduced overall production cost, and through special tooling one -time press -pack action can complete the connection of protection cover and coil assembly, the whole process time -consuming is extremely short, need not waiting for adhesive solidification, significantly improved assembly efficiency, and easy to realize automatic high -speed production.

Description

Technical Field

[0001] This utility model relates to the field of automotive engineering technology, and more specifically to a riveting structure for a solenoid valve protective shell. Background Technology

[0002] Solenoid valves are widely used for hydraulic control in modern automotive transmissions. Solenoid valve coil assemblies typically require a protective cover (back cover) to protect the coil, terminals, and wires from external environmental factors (such as oil, dust, and moisture) and mechanical damage. Currently, the most common method for connecting these protective covers is to glue them to the coil housing or terminals using adhesives (such as epoxy resin or silicone).

[0003] However, this bonding method has many problems: First, the adhesive itself has procurement costs, and the application process requires specialized dispensing equipment, which increases costs due to equipment investment and subsequent maintenance. Manual application also incurs labor costs. Second, the application process is complex, with strict requirements on the amount and location of the adhesive, and the adhesive requires a certain curing time, which prolongs the production cycle and affects assembly efficiency. Third, the adhesive will age over time, and its bonding strength will decrease, posing a risk of the protective cover falling off and affecting the normal operation of the solenoid valve. Furthermore, the adhesive releases VOCs (volatile organic compounds) during curing, which does not meet environmental protection requirements. Moreover, manual application is prone to product quality fluctuations due to operational differences, resulting in poor product consistency.

[0004] In view of this, the present invention provides a riveting structure for the protective shell of an electromagnetic valve. Utility Model Content

[0005] To achieve the above objectives, the present invention aims to provide a riveting structure for a solenoid valve protective shell, comprising at least one assembly structure, wherein the assembly structure includes a coil assembly, a protective shell, a hydraulic assembly, and an electromagnetic assembly.

[0006] A coil assembly, which is integrated within an electromagnetic assembly and is disposed corresponding to a solenoid, the coil assembly having at least one terminal for electrical connection, the terminal having a protrusion;

[0007] A protective shell is provided to cover the coil assembly to protect the first PIN and the second PIN from external forces. The protective shell has rivet holes corresponding to the positions of the terminal protrusions. The inner diameter of the protective shell has an annular groove and a positioning post in the middle. The annular groove is used to engage with the annular protrusion at the top of the solenoid. The positioning post has an annular protrusion to form a tenon-and-mortise interlock.

[0008] The inner diameter of the rivet hole is smaller than the outer diameter of the protrusion. The protrusion can be pressed into the rivet hole under pressure, and the top of the protrusion can undergo plastic deformation to form a rivet head.

[0009] The electromagnetic component is connected to the hydraulic component through a flange protruding from the end of the valve sleeve and bent to close the flange. The hydraulic component includes a valve sleeve assembly formed by interference riveting the valve sleeve filter screen and the valve sleeve. The valve sleeve assembly is provided with a first external sealing ring assembly and a second external sealing ring assembly. The valve sleeve is provided with an axial oil inlet chamber and a radial control oil chamber.

[0010] As a further improvement to this technical solution, the electromagnetic component also includes a magnetic housing assembly, a rear yoke assembly, a first bearing, a second bearing, a magnetic core, a magnetic core shaft, a return spring, a steel ball spring seat, a first solenoid assembly, a second solenoid assembly, and a pole shoe assembly. The magnetic housing assembly is used to form a magnetic field circuit. The first bearing and the second bearing support the movement of the magnetic core shaft. The pole shoe assembly is located on the outside of the magnetic core to optimize the magnetic field distribution.

[0011] As a further improvement to this technical solution, the hydraulic assembly also includes a valve core, a second support seat, a locking steel ball, a turbofan oil guide seat, and a first support seat. The valve core is riveted to the second support seat, the locking steel ball is used to close the oil inlet, and the turbofan oil guide seat is supported by the first support seat.

[0012] As a further improvement to this technical solution, the protective shell is made of insulating plastic, the protrusion of the terminal block is made of metal, and the rivet head is shaped like a mushroom head, a flange, or an upsetting shape.

[0013] As a further improvement to this technical solution, the electromagnetic component also includes a gasket, a PIN pin protective cover, and a dust cover. The gasket is injection molded and disposed on the outside of the coil component. The PIN pin protective cover is disposed corresponding to the first PIN pin and the second PIN pin. The dust cover is fitted onto the end of the electromagnetic component.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. The riveting structure of the solenoid valve protective shell eliminates the need for glue bonding, saving the purchase cost of glue. At the same time, it eliminates the need for dispensing equipment and curing equipment, reducing equipment investment and maintenance costs, as well as labor operation costs, significantly reducing the overall production cost. Furthermore, the connection between the protective cover and the coil assembly can be completed in one press-fit action using special tooling. The entire process takes very little time, and there is no need to wait for the glue to cure, which significantly improves assembly efficiency and makes it easy to achieve automated high-speed production.

[0016] 2. In the riveting structure of the solenoid valve protective shell, the riveting head formed by mechanical riveting and the radial clamping force generated by the interference fit form a double mechanical locking structure. The combination of axial limiting and radial clamping results in high connection strength and excellent vibration and impact resistance. Since there is no glue aging problem, the risk of the protective cover falling off is completely eliminated, ensuring the long-term stable operation of the solenoid valve. At the same time, the special press-fitting tool can accurately control the press-fitting position, depth and riveting force, ensuring a high degree of consistency in the quality of each assembly, avoiding product quality fluctuations caused by manual glue application, and ensuring stable and controllable product quality.

[0017] 3. In the riveting structure of the solenoid valve protective shell, no glue is needed during the production process, which avoids the emission of harmful gases generated by glue volatilization, making it more environmentally friendly and in line with the environmental protection development trend of modern industry. At the same time, only the coil terminal needs to be raised and the protective cover needs to be opened with corresponding riveting holes. The original structure is modified little, and the design and manufacturing difficulty of the special tooling is moderate, making it easy to promote and implement. Attached Figure Description

[0018] The present invention will now be described in more detail by way of example, with reference to the accompanying drawings, in which:

[0019] Figure 1 This is a schematic diagram of the solenoid valve assembly structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the solenoid valve engagement of this utility model.

[0021] Figure 3 This is a schematic diagram of the protective cover of this utility model.

[0022] The meanings of the labels in the diagram are as follows:

[0023] 1. Assembly structure; 2. Locking steel ball; 3. Valve sleeve filter screen; 4. Turbine fan oil guide seat; 5. First support seat; 6. Valve sleeve; 7. Pole shoe assembly; 8. Magnetic housing assembly; 9. First bearing; 10. Hydraulic assembly; 11. Gasket; 12. Pin protective cover; 13. First pin; 14. Dust cover; 15. Second pin; 16. Steel ball spring seat; 17. Rear yoke sleeve assembly; 18. Return spring; 19. First solenoid assembly; 20. Electromagnetic assembly; 21. Magnetic core shaft; 22. Second bearing; 23. Second solenoid assembly; 24. Second support seat; 25. Valve core; 26. First external sealing ring assembly; 27. Oil inlet chamber; 28. Second external sealing ring assembly; 30. Flange; 31. Solenoid; 34. Control oil chamber; 35. Magnetic core; 36. Positioning pin; 37. Annular groove. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] 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.

[0027] Please see Figures 1-3 As shown, the purpose of this embodiment is to provide a riveting structure for a solenoid valve protective shell, which includes at least one assembly structure 1, the assembly structure 1 including a coil assembly, a protective shell, a hydraulic assembly 10 and a solenoid assembly 20;

[0028] A coil assembly is integrated within the electromagnetic assembly 20 and is disposed corresponding to the solenoid 31. The coil assembly has at least one terminal for electrical connection, and the terminal has a protrusion.

[0029] The protective shell is used to cover the coil assembly to protect the first PIN pin 13 and the second PIN pin 15 from external forces. The protective shell has rivet holes corresponding to the positions of the terminal protrusions. The inner diameter of the protective shell has an annular groove 37 and a positioning post 36 in the middle. The annular groove 37 is used to engage with the annular protrusion on the top of the solenoid 31. The positioning post 36 has an annular protrusion to form a tenon-and-mortise interlock.

[0030] The inner diameter of the rivet hole is smaller than the outer diameter of the protrusion. The protrusion can be pressed into the rivet hole under pressure, and the top of the protrusion can undergo plastic deformation to form a rivet head.

[0031] The electromagnetic component 20 is connected to the hydraulic component 10 through the flange 30 protruding from the end of the valve sleeve 6, which is bent and closed. The hydraulic component 10 includes a valve sleeve assembly formed by the valve sleeve filter screen 3 and the valve sleeve 6 through interference riveting. The valve sleeve assembly is provided with a first external sealing ring assembly 26 and a second external sealing ring assembly 28. The valve sleeve 6 is provided with an axial oil inlet chamber 27 and a radial control oil chamber 34.

[0032] The electromagnetic assembly 20 also includes a magnetic housing assembly 8, a rear yoke assembly 17, a first bearing 9, a second bearing 22, a magnetic core 35, a magnetic core shaft 21, a return spring 18, a steel ball spring seat 16, a first solenoid assembly 19, a second solenoid assembly 23, and a pole shoe assembly 7. The magnetic housing assembly 8 is used to form a magnetic field circuit. The first bearing 9 and the second bearing 22 support the movement of the magnetic core shaft 21. The pole shoe assembly 7 is located on the outside of the magnetic core 35 to optimize the magnetic field distribution.

[0033] Hydraulic assembly 10 also includes valve core 25, second support seat 24, locking steel ball 2, turbofan oil guide seat 4, and first support seat 5. Valve core 25 and second support seat 24 are riveted together. Locking steel ball 2 is used to close the oil inlet. Turbofan oil guide seat 4 is supported by first support seat 5.

[0034] The protective shell is made of insulating plastic, the protruding part of the terminal block is made of metal, and the rivet head is shaped like a mushroom head, a flange, or an upsetting shape.

[0035] The electromagnetic component 20 also includes a gasket 11, a PIN pin protective cover 12, and a dust cover 14. The gasket 11 is injection molded and located on the outside of the coil component. The PIN pin protective cover 12 is provided corresponding to the first PIN pin 13 and the second PIN pin 15. The dust cover 14 covers the end of the electromagnetic component 20.

[0036] Interference fit radial locking: The inner diameter of the rivet hole is smaller than the outer diameter of the terminal protrusion, such as the diameter of the protrusion is 5.2mm and the diameter of the rivet hole is 4.8mm, forming an interference of 0.4mm. After pressing, the plastic rivet hole wall is squeezed and produces elastic deformation, tightly wrapping the metal protrusion, generating a continuous radial clamping force, preventing the protective shell from moving or rotating radially.

[0037] Plastic deformation riveting axial locking: Under pressure, the top of the metal protrusion undergoes plastic deformation, such as upsetting or rolling into a mushroom head shape, forming a riveting head with a diameter larger than the riveting hole. This head is pressed against the opening of the protective shell or embedded in the deformed area inside the hole, forming an axial mechanical stop to prevent the protective shell from detaching upwards.

[0038] The assembly method of a riveted structure for a solenoid valve protective shell is as follows:

[0039] S1 Preparation: Provide a coil assembly with terminal protrusions and a protective shell with rivet holes, annular grooves 37 and positioning posts 36 integrated in the electromagnetic assembly 20. The electromagnetic assembly 20 is connected to the hydraulic assembly 10 via flange 30.

[0040] S2 Positioning: Place the protective shell above the coil assembly, aligning the riveting hole with the protruding part of the terminal block, and simultaneously make the annular groove 37 initially engage with the annular protrusion on the top of the solenoid 31 as shown in the attached diagram. Figure 2 As shown, positioning is assisted by the corresponding structure of the positioning post 36 and the solenoid 31;

[0041] The protective shell and the coil assembly are initially aligned by auxiliary structures such as annular grooves and protrusions, and then precisely positioned by tooling guides such as guide sleeves to ensure that the rivet hole and the terminal protrusion are coaxial, thus avoiding misalignment during press-fitting.

[0042] S3 Press Fitting and Riveting: Using specialized tooling, pressure is applied to press the protruding part of the terminal into the riveting hole for an interference fit and plastic deformation to form the riveting head as shown in the attached diagram. Figure 3 As shown, the riveting head and the protective shell form an axial interlock.

[0043] The pressure head of the specialized tooling can be designed with specific contours such as recesses or conical surfaces to apply vertical pressure, such as 8-10 kN, simultaneously completing two key actions:

[0044] The protrusion is forced into the rivet hole, and the deformation characteristics of metal and plastic are used to form an interference fit. The plastic hole wall is elastically deformed, and the metal protrusion maintains structural stability.

[0045] Under pressure and guided by the profile of the pressure head, the top of the protrusion undergoes plastic deformation to form a pre-shaped rivet head, such as a mushroom head with a diameter of 6.5mm, which forms a mechanical interlock with the protective shell.

[0046] S4 Inspection: Check that the gap 33 between the protective shell and the solenoid 31 is uniform, and that the first external sealing ring assembly 26 and the second external sealing ring assembly 28 are not offset;

[0047] After the tooling is removed, the radial clamping force of the interference fit and the axial stopping force of the riveting head work together to form an inseparable and firm connection between the protective shell and the coil assembly.

[0048] The guide part of the special tooling is positioned to correspond to the outer circle of the valve sleeve 6, and the pressure head is positioned to correspond to the top of the terminal protrusion as shown in the attached figure. Figure 1 As shown, the tooling applies pressure along the axial direction of the solenoid valve assembly structure 1;

[0049] The assembly includes a solenoid valve assembly structure 1, a coil assembly, a protective housing, a solenoid assembly 20, and a hydraulic assembly 10. The magnetic core shaft 21 within the solenoid assembly 20 can drive the valve core 25 to move when the solenoid 31 is energized, thereby controlling the opening and closing of the oil inlet chamber 27 and the control oil chamber 34, as shown in the attached figure. Figure 1 As shown, the components work together to achieve hydraulic control functions.

[0050] 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 riveting structure for a solenoid valve protective shell, characterized in that: It includes at least one assembly structure (1), which comprises a coil assembly, a protective housing, a hydraulic assembly (10) and an electromagnetic assembly (20). A coil assembly, which is integrated within an electromagnetic assembly (20) and is disposed corresponding to a solenoid (31), the coil assembly having at least one terminal for electrical connection, the terminal having a protrusion; A protective shell is provided to cover the coil assembly to protect the first PIN pin (13) and the second PIN pin (15) from external forces. The protective shell has a riveting hole corresponding to the position of the terminal protrusion. The inner diameter of the protective shell has an annular groove (37) and a positioning post (36) in the middle. The annular groove (37) is used to engage with the annular protrusion on the top of the solenoid (31). The positioning post (36) has an annular protrusion to form a tenon-and-mortise interlock. The inner diameter of the rivet hole is smaller than the outer diameter of the protrusion. The protrusion can be pressed into the rivet hole under pressure, and the top of the protrusion can undergo plastic deformation to form a rivet head. The electromagnetic component (20) is connected to the hydraulic component (10) by bending and closing the flange (30) protruding from the end of the valve sleeve (6). The hydraulic component (10) includes a valve sleeve assembly formed by interference riveting the valve sleeve filter (3) and the valve sleeve (6). The valve sleeve assembly is provided with a first external sealing ring assembly (26) and a second external sealing ring assembly (28). The valve sleeve (6) is provided with an axial oil inlet chamber (27) and a radial control oil chamber (34).

2. The riveting structure for the solenoid valve protective shell as described in claim 1, characterized in that: The electromagnetic component (20) also includes a magnetic housing assembly (8), a rear yoke assembly (17), a first bearing (9), a second bearing (22), a magnetic core (35), a magnetic core shaft (21), a return spring (18), a steel ball spring seat (16), a first solenoid assembly (19), a second solenoid assembly (23), and a pole shoe assembly (7). The magnetic housing assembly (8) is used to form a magnetic field circuit. The first bearing (9) and the second bearing (22) support the movement of the magnetic core shaft (21). The pole shoe assembly (7) is located outside the magnetic core (35) to optimize the magnetic field distribution.

3. The riveting structure for the solenoid valve protective shell as described in claim 1, characterized in that: The hydraulic assembly (10) also includes a valve core (25), a second support seat (24), a locking steel ball (2), a turbofan oil guide seat (4), and a first support seat (5). The valve core (25) is riveted to the second support seat (24). The locking steel ball (2) is used to close the oil inlet. The turbofan oil guide seat (4) is supported by the first support seat (5).

4. The riveting structure for the solenoid valve protective shell as described in claim 1, characterized in that: The protective shell is made of insulating plastic, the protrusion of the terminal block is made of metal, and the rivet head is shaped like a mushroom head, a flange, or an upsetting shape.

5. The riveting structure for the solenoid valve protective shell as described in claim 1, characterized in that: The electromagnetic component (20) also includes a gasket (11), a PIN pin protective cover (12), and a dust cover (14). The gasket (11) is injection molded and located on the outside of the coil component. The PIN pin protective cover (12) is provided corresponding to the first PIN pin (13) and the second PIN pin (15). The dust cover (14) is closed on the end of the electromagnetic component (20).

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