A solenoid valve assembly

Abstract

The utility model belongs to solenoid valve assembly technical field, concretely is a solenoid valve assembly structure, including fixed sleeve, valve shell, limit sleeve, rotary pressure head, thrust bearing and electromagnet assembly, fixed sleeve is by two symmetrical parts splicing and is composed, the inside of valve shell is provided with assembly cavity, and electromagnet assembly is movably placed in assembly cavity, the inner wall of limit sleeve is equipped with inner connecting thread, and the outer wall is equipped with outer connecting thread, and the inner wall of assembly cavity of valve shell is equipped with valve shell inner thread, and limit sleeve is connected with valve shell inner thread through outer connecting thread and thread connection, the outer wall of rotary pressure head is equipped with pressure head outer thread, and the one end of rotary pressure head towards electromagnet assembly is provided with pressure installation groove, the direct pressure installation mode of usually used press of the application is changed to utilize thread screwing in pressure installation, and the limitation that cannot be pressure installed under the condition of no press is overcome.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic valve assembly technology, specifically to an electromagnetic valve assembly structure. Background Technology

[0002] As a key actuator in the field of industrial automation control, solenoid valves are widely used in fluid control, mechanical transmission, automotive electronics and many other fields. Their core performance depends on the precise assembly of their internal components, especially the assembly accuracy of the electromagnet assembly and the valve housing. The fit clearance and axial position of the two directly affect the electromagnetic response efficiency, sealing performance and service life of the solenoid valve. Therefore, the assembly process is the core process in the production and maintenance of solenoid valves.

[0003] Currently, the mainstream method in the industry for assembling the electromagnet assembly and valve housing of solenoid valves is direct press-fitting using a press. This involves first placing the electromagnet assembly into the assembly cavity of the valve housing, then applying axial pressure using a hydraulic or pneumatic press to force the assembly into a predetermined position, thus eliminating initial positional offset issues caused by dimensional tolerances. While this assembly method meets basic press-fitting requirements, it suffers from several unavoidable technical drawbacks in practical applications, as follows: Strong limitations in application scenarios: The press is large and inconvenient to move, and can only be used in fixed workshops. It cannot be used for outdoor on-site repairs, or for small businesses or repair stations without a press. High cost: The cost of purchasing and maintaining the press (changing hydraulic oil and seals) is high. The equipment idle rate is high when producing small batches or performing sporadic repairs, resulting in poor economic efficiency. Large space occupation: The press occupies a large area and cannot be operated in scenarios with limited space, such as small workshops or internal equipment maintenance. Poor adaptability: Existing tooling is mostly of fixed specifications and only fits a single valve housing. When changing the solenoid valve specification, tooling needs to be changed frequently, which is cumbersome.

[0004] In summary, existing assembly methods that rely on large presses cannot meet the needs of on-site maintenance, multi-specification adaptation, and low-cost operation. Developing a solenoid valve assembly solution that does not require a press, has low cost, and requires little space is an urgent problem to be solved in this field. To this end, we propose a solenoid valve assembly structure. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a solenoid valve assembly structure, which solves the problems mentioned below.

[0006] To achieve the above objectives, this utility model provides the following technical solution: An assembly structure for a solenoid valve includes a fixed sleeve, a valve housing, a limiting sleeve, a rotating pressure head, a thrust bearing, and an electromagnet assembly. The fixing sleeve is composed of two symmetrical parts spliced ​​together, and the fixing sleeve is used to hold the valve housing tightly; The valve housing has an assembly cavity inside, and the electromagnet assembly is movably placed inside the assembly cavity. The inner wall of the limiting sleeve is provided with an internal connecting thread and the outer wall is provided with an external connecting thread. The inner wall of the assembly cavity of the valve housing is provided with an internal thread of the valve housing. The limiting sleeve is threadedly connected to the internal thread of the valve housing through the external connecting thread. The outer wall of the rotating pressure head is provided with an external thread, and the rotating pressure head is threadedly connected to the inner connecting thread of the limiting sleeve through the external thread; The rotating pressure head has a pressing groove at one end facing the electromagnet assembly. The thrust bearing is embedded in the pressing groove, and the side of the thrust bearing away from the rotating pressure head is in contact with the end face of the electromagnet assembly.

[0007] Preferably, the fixing sleeve has a through clamping hole, which includes two hole segments of different diameters.

[0008] Preferably, the outer wall of the limiting sleeve is further provided with an annular limiting boss, the outer diameter of the limiting boss is larger than the outer diameter of the end face of the valve housing, and the side of the limiting boss facing the valve housing abuts against the end face of the valve housing.

[0009] Preferably, the end of the rotary pressure head away from the electromagnet assembly is provided with an external hexagonal structure, which is adapted to a wrench tool to realize the turning of the rotary pressure head; The press-fit groove is an annular groove, and the inner diameter of the press-fit groove is adapted to the inner ring diameter of the thrust bearing.

[0010] Preferably, the thrust bearing is an integral planar thrust bearing, the inner ring of the thrust bearing is interference-fitted with the inner wall of the press-fit groove, and the outer ring end face of the thrust bearing is in close contact with the top surface of the electromagnet assembly.

[0011] Preferably, the assembly cavity of the valve housing has a stepped hole structure, and the internal thread of the valve housing is formed on the inner wall of the assembly cavity near the opening end; the depth of the assembly cavity is greater than the length of the electromagnet assembly.

[0012] Preferably, the inner connecting thread of the limiting sleeve and the outer thread of the rotating pressure head are both fine threads, and the threads of the two are in the same direction.

[0013] Preferably, the outer edge of the fixing sleeve is a planar structure, and the width of the outer edge of the fixing sleeve is greater than the maximum diameter of the clamping hole in its inner wall.

[0014] This utility model provides a solenoid valve assembly structure. Compared with the prior art, it has the following advantages: 1. The commonly used direct pressing method is replaced with threaded screw-in pressing, overcoming the... The limitation of not being able to press-fit without a press; 2. Utilizing the inherent thread characteristics of the product for press fitting can save on press operating costs; 3. The pressing process saves more space. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the present utility model; Figure 2 This is a schematic diagram of the main cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the disassembled structure of this utility model; Figure 4 This is a schematic diagram of the cross-sectional structure of the valve shell of this utility model; Figure 5 This is a schematic diagram of the cross-sectional structure of the limiting sleeve of this utility model; Figure 6 This is a schematic diagram of the cross-sectional structure of the rotating pressure head of this utility model.

[0016] In the diagram: 1. Fixed sleeve; 2. Valve housing; 3. Limiting sleeve; 4. Rotary pressure head; 5. Thrust bearing; 6. Electromagnet assembly; 7. External thread of pressure head; 8. Internal thread of valve housing; 9. Assembly cavity; 10. Internal connection thread; 11. Limiting boss; 12. External connection thread; 13. Reserved hole; 14. Press-fit groove. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1-6 This utility model provides a technical solution: a solenoid valve assembly structure, including a fixed sleeve 1, a valve housing 2, a limiting sleeve 3, a rotating pressure head 4, a thrust bearing 5, and an electromagnet assembly 6; The fixing sleeve 1 is composed of two symmetrical parts spliced ​​together, and the fixing sleeve 1 is used to hold the valve housing 2 tightly; The valve housing 2 has an assembly cavity 9 inside, and the electromagnet assembly 6 is movably placed in the assembly cavity 9. The inner wall of the limiting sleeve 3 is provided with an inner connecting thread 10 and the outer wall is provided with an outer connecting thread 12. The inner wall of the assembly cavity 9 of the valve housing 2 is provided with a valve housing inner thread 8. The limiting sleeve 3 is threadedly connected to the valve housing inner thread 8 through the outer connecting thread 12. The outer wall of the rotating pressure head 4 is provided with an external thread 7, and the rotating pressure head 4 is threadedly connected to the inner connecting thread 10 of the limiting sleeve 3 through the external thread 7. The rotating pressure head 4 has a pressure groove 14 at one end facing the electromagnet assembly 6. The thrust bearing 5 is embedded in the pressure groove 14, and the side of the thrust bearing 5 away from the rotating pressure head 4 is in contact with the end face of the electromagnet assembly 6.

[0019] The fixing sleeve 1 has a through clamping hole, which includes two different diameter segments to fix solenoid valves of different specifications.

[0020] The outer wall of the limiting sleeve 3 is also provided with an annular limiting boss 11. The outer diameter of the limiting boss 11 is larger than the outer diameter of the end face of the valve housing 2. The side of the limiting boss 11 facing the valve housing 2 abuts against the end face of the valve housing 2.

[0021] The rotating pressure head 4 is provided with an external hexagonal structure at one end away from the electromagnet assembly 6. The external hexagonal structure is adapted to a wrench tool to realize the turning of the rotating pressure head 4. The press-fit groove 14 is an annular groove, and the inner diameter of the press-fit groove 14 is adapted to the inner ring diameter of the thrust bearing 5.

[0022] The thrust bearing 5 is an integral planar thrust bearing. The inner ring of the thrust bearing 5 is interference-fitted with the inner wall of the press groove 14, and the outer ring end face of the thrust bearing 5 is in close contact with the top face of the electromagnet assembly 6 to withstand the axial force during the press-fitting process and meet the rotation requirements of the rotating pressure head 4.

[0023] The assembly cavity 9 of the valve housing 2 has a stepped hole structure, and the valve housing internal thread 8 is opened on the inner wall of the assembly cavity 9 near the opening end; the depth of the assembly cavity 9 is greater than the length of the electromagnet assembly 6, so as to reserve the press-fit stroke of the electromagnet assembly (6).

[0024] The inner connecting thread 10 of the limiting sleeve 3 and the outer thread 7 of the rotating pressure head 4 are both fine threads, and the threads of the two are in the same direction to improve the stress stability during the pressing process and prevent the threads from loosening.

[0025] The outer edge of the fixing sleeve 1 is a planar structure. The width of the outer edge of the fixing sleeve 1 is greater than the maximum diameter of the clamping hole in its inner wall. The outer edge of the fixing sleeve 1 is adapted to clamping tools such as pliers and bench vises to achieve the fixation of the entire assembly structure.

[0026] A reserved hole 13 is provided on the rotating pressure head 4 and located at the inner top of the pressing groove 14. The reserved hole 13 can reserve space for the shaft of the solenoid valve assembly 6.

[0027] Working principle: First, the fixing sleeve 1, which is composed of two symmetrical parts, is wrapped around the outer wall of the valve housing 2. The two different diameter holes through the fixing sleeve 1 are used to fit the valve housing 2 of the corresponding specifications. Then, the outer edge of the planar structure of the fixing sleeve 1 is clamped on tools such as pliers and bench vises. The clamping force of the fixing sleeve 1 and the clamping force of the external tools are used to completely fix the valve housing 2 and avoid displacement during subsequent press-fitting. The initial placement of the electromagnet assembly 6 involves placing the electromagnet assembly 6 to be assembled into the stepped hole type assembly cavity 9 inside the valve housing 2, leaving room for the subsequent axial pressing stroke of the electromagnet assembly 6. At this time, the electromagnet assembly 6 is temporarily in the initial position near the opening of the assembly cavity 9, and needs to be pushed to the target assembly position by the subsequent structure. Align the limiting sleeve 3 with the opening of the assembly cavity 9 of the valve housing 2, and make a threaded connection with the valve housing internal thread 8 on the inner wall of the assembly cavity 9 of the valve housing 2 through the external connecting thread 12 on the outer wall of the limiting sleeve 3; when the annular limiting boss 11 on the outer wall of the limiting sleeve 3 is fully in contact with the end face of the valve housing 2, stop tightening. At this time, the limiting sleeve 3 avoids excessive insertion into the assembly cavity 9 and interference with the electromagnet assembly 6, and provides a stable axial reference for subsequent press-fit transmission. Then, the integrated planar thrust bearing 5 is embedded in the annular pressing groove 14 of the rotating pressure head 4 facing the electromagnet assembly 6 to ensure that the two move synchronously; then the rotating pressure head 4 is threadedly connected to the inner connecting thread 10 of the inner wall of the limiting sleeve 3 through the external thread 7 of the pressure head on its outer wall. Use a wrench or other tools to clamp the external hexagonal structure at the end of the rotating pressure head 4 away from the electromagnet assembly 6, and turn the rotating pressure head 4 clockwise: through the thread transmission between the external thread 7 of the pressure head and the internal connecting thread 10 of the limit sleeve 3, the rotational force of the tool is converted into the axial linear movement force of the rotating pressure head 4. The outer ring end face of the thrust bearing 5 is in close contact with the top face of the electromagnet assembly 6, and the bearing can isolate the rotational motion to prevent the electromagnet assembly 6 from rotating synchronously with the rotating pressure head 4. Finally, the thrust bearing 5 completely transmits the axial force to the electromagnet assembly 6, pushing it to move axially along the assembly cavity 9 of the valve housing 2 until the electromagnet assembly 6 reaches the preset assembly position, completing the entire assembly process. The symmetrical flat clamping and fixing of the outer periphery prevents the limit sleeve 3 from rotating synchronously with the rotating pressure head 4, further ensuring the pressing accuracy, and finally realizing the assembly of this solenoid valve.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A solenoid valve assembly structure, characterized in that, It includes a fixed sleeve (1), a valve housing (2), a limiting sleeve (3), a rotating pressure head (4), a thrust bearing (5), and an electromagnet assembly (6); The fixing sleeve (1) is composed of two symmetrical parts spliced ​​together, and the fixing sleeve (1) is used to hold the valve shell (2). The valve housing (2) has an assembly cavity (9) inside, and the electromagnet assembly (6) is movably placed in the assembly cavity (9); The inner wall of the limiting sleeve (3) is provided with an inner connecting thread (10) and the outer wall is provided with an outer connecting thread (12). The inner wall of the assembly cavity (9) of the valve housing (2) is provided with a valve housing inner thread (8). The limiting sleeve (3) is threadedly connected to the valve housing inner thread (8) through the outer connecting thread (12). The outer wall of the rotating pressure head (4) is provided with an external thread (7), and the rotating pressure head (4) is threadedly connected to the inner connecting thread (10) of the limiting sleeve (3) through the external thread (7); The rotating pressure head (4) has a pressure groove (14) at one end facing the electromagnet assembly (6), the thrust bearing (5) is embedded in the pressure groove (14), and the side of the thrust bearing (5) away from the rotating pressure head (4) is in contact with the end face of the electromagnet assembly (6).

2. The solenoid valve assembly structure according to claim 1, characterized in that, The fixing sleeve (1) has a through clamping hole, which includes two different diameter segments.

3. The solenoid valve assembly structure according to claim 2, characterized in that, The outer wall of the limiting sleeve (3) is also provided with an annular limiting boss (11). The outer diameter of the limiting boss (11) is larger than the outer diameter of the end face of the valve housing (2). The side of the limiting boss (11) facing the valve housing (2) abuts against the end face of the valve housing (2).

4. The solenoid valve assembly structure according to claim 3, characterized in that, The rotating pressure head (4) is provided with an external hexagonal structure at one end away from the electromagnet assembly (6). The external hexagonal structure is adapted to a wrench tool to realize the turning of the rotating pressure head (4). The press-fit groove (14) is an annular groove, and the inner diameter of the press-fit groove (14) is adapted to the inner ring diameter of the thrust bearing (5).

5. The solenoid valve assembly structure according to claim 4, characterized in that, The thrust bearing (5) is an integral planar thrust bearing. The inner ring of the thrust bearing (5) is interference-fitted with the inner wall of the press-fit groove (14). The outer ring end face of the thrust bearing (5) is in close contact with the top surface of the electromagnet assembly (6).

6. The solenoid valve assembly structure according to claim 5, characterized in that, The assembly cavity (9) of the valve housing (2) has a stepped hole structure, and the valve housing internal thread (8) is opened on the inner wall of the assembly cavity (9) near the opening end; the depth of the assembly cavity (9) is greater than the length of the electromagnet assembly (6).

7. The solenoid valve assembly structure according to claim 6, characterized in that, The inner connecting thread (10) of the limiting sleeve (3) and the outer thread (7) of the rotating pressure head (4) are both fine threads, and the threads of the two are in the same direction.

8. The solenoid valve assembly structure according to claim 7, characterized in that, The outer edge of the fixing sleeve (1) is a planar structure, and the width of the outer edge of the fixing sleeve (1) is greater than the maximum diameter of the clamping hole in its inner wall.

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