Solenoid valve

Abstract

The utility model belongs to the technical field of control valves, and particularly discloses an electromagnetic valve. The electromagnetic valve comprises an electromagnetic valve body, a coil assembly and a valve block, wherein the coil assembly is provided with an inner hole; the electromagnetic valve body is provided with a first connecting section and a second connecting section in the length direction of the electromagnetic valve body, and the first connecting section is installed in the inner hole. The valve block is provided with a mounting cavity, the second connecting section is mounted in the mounting cavity, and the coil assembly is connected with the valve block. According to the electromagnetic valve, the assembling precision of the electromagnetic valve can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of control valves, and particularly relates to a solenoid valve. Background Technique

[0002] An automotive hydraulic braking system pushes brake fluid from an oil pot into a brake caliper to apply frictional force to the wheels, achieving service braking and parking braking. The vehicle calculates the target braking force required by the vehicle based on the driving data collected, and the braking system establishes a braking force that meets the target. During braking, there will be a certain deviation between the actual braking force and the target braking force. Throughout the braking process, the smaller the deviation of the braking force, the shorter the braking distance and the better the vehicle stability.

[0003] In order to reduce the deviation between the actual braking force and the target braking force, a linear solenoid valve is used to adjust the actual braking force during the pressure build-up process. However, the adjustable range of the linear solenoid valve is very narrow, and the assembly deviation of the linear solenoid valve in the related art is relatively large, further narrowing the adjustment range of the solenoid valve. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems in the related art to a certain extent. For this purpose, an embodiment of the utility model provides a solenoid valve, which can improve the assembly accuracy of the solenoid valve.

[0005] The solenoid valve in this embodiment includes: a coil assembly, the coil assembly having an inner hole; a solenoid valve body, the solenoid valve body having a first connection section and a second connection section along its length direction, the first connection section being installed in the inner hole; a valve block, the valve block having an installation cavity, the second connection section being installed in the installation cavity, and the coil assembly being connected to the valve block.

[0006] It can be understood that by connecting the coil assembly to the valve block, when assembling the solenoid valve, the first connection end can be first installed in the inner hole of the coil assembly and the coil assembly can be connected to the valve block, which can ensure the consistency of the coaxiality of the solenoid valve body and the coil assembly, improve the assembly accuracy, so that the electromagnetic force can be more uniform, which is beneficial to improving the linear control accuracy of the solenoid valve, and avoids the large coaxiality deviation between the solenoid valve and the coil assembly caused by error accumulation when the solenoid valve body and the valve block are first connected and then the solenoid valve body and the coil are connected. And connecting the coil assembly to the valve block can reduce the deviation of the inner hole position caused by the skew of the coil assembly, which is beneficial to reducing the coaxiality deviation between the solenoid valve body and the inner hole of the coil assembly.

[0007] In this embodiment, the first connection section and the inner hole adopt an interference fit.

[0008] In this embodiment, the coil assembly includes: a second housing disposed on the valve block, the second housing being cylindrical; a support member disposed within the second housing, an installation space being formed between the outer wall of the support member and the inner wall of the second housing, the support member forming the inner hole; and a coil disposed within the installation space.

[0009] In this embodiment, the coil assembly further includes a first connection flange disposed on the outer wall of the second housing and connected to the valve block.

[0010] In this embodiment, the first connection flange and the second housing are integrally formed.

[0011] In this embodiment, the coil assembly further includes yokes, and the yokes are disposed at both ends of the installation space.

[0012] In this embodiment, the solenoid valve further includes a first housing connected to the valve block, and the first housing is disposed outside the coil assembly and the solenoid valve body.

[0013] In this embodiment, the first housing includes a top plate, side plates surrounding the circumference of the top plate, and a second connection flange disposed on the outer circumference of the side plates and located at one end of the side plates away from the top plate.

[0014] In this embodiment, the top plate, the side plates, and the second connection flange are integrally formed. Description of the Drawings

[0015] Figure 1 is a flowchart of the assembly method of the solenoid valve according to the embodiment of the present invention.

[0016] Figure 2 is an exploded view of the solenoid valve according to the embodiment of the present invention.

[0017] Reference Numerals:

[0018] 1, solenoid valve body; 11, first connection section; 12, second connection section;

[0019] 2, coil assembly; 21, inner hole; 22, second housing; 23, support member; 24, coil; 25, yoke; 26, first connection flange; 261, third connection hole;

[0020] 3, valve block; 31, installation cavity; 32, second connection hole; 33, fourth connection hole;

[0021] 4, first housing; 41, top plate; 42, side plates; 43, second connection flange; 431, first connection hole. Detailed implementation manners

[0022] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0023] An embodiment of the present utility model provides a solenoid valve, as Figure 2 shown. The solenoid valve includes a coil assembly 2, a solenoid valve body 1, and a valve block 3. The coil assembly 2 has an inner hole 21. The solenoid valve body 1 has a first connection section 11 and a second connection section 12 along its length direction. The first connection section 11 is installed in the inner hole 21. The valve block 3 has an installation cavity 31, and the second connection section 12 is installed in the installation cavity 31, and the coil assembly 2 is connected to the valve block 3.

[0024] It can be understood that by connecting the coil assembly 2 to the valve block 3, when assembling the solenoid valve, the first connection end 11 can be first installed in the inner hole 21 of the coil assembly 2, and the coil assembly 2 can be connected to the valve block 3, which can ensure the consistency of the coaxiality of the assembly of the solenoid valve body 1 and the coil 24, improve the assembly accuracy, so that the electromagnetic force can be more uniform, which is beneficial to improving the linear control accuracy of the solenoid valve, and avoids the large deviation of the coaxiality between the solenoid valve and the coil assembly 2 caused by error accumulation when the solenoid valve body 1 and the valve block 3 are first connected and then the solenoid valve body 1 and the coil 24 are connected. And connecting the coil assembly 2 to the valve block 3 can reduce the deviation of the position of the inner hole 21 caused by the skew of the coil assembly 2, which is beneficial to reducing the coaxiality deviation between the solenoid valve body 1 and the inner hole 21 of the coil assembly 2.

[0025] In this embodiment, the solenoid valve body 1 and the inner hole 21 adopt an interference fit.

[0026] It can be understood that by adopting an interference fit between the solenoid valve body 1 and the inner hole 21, the coaxiality deviation between the solenoid valve body 1 and the inner hole 21 can be made smaller, which is beneficial to improving the assembly accuracy. In addition, adopting an interference fit can reduce the damage to the solenoid valve body 1 and the coil assembly 2 caused by extrusion during the assembly process of the solenoid valve body 1 and the coil assembly 2. Of course, an interference fit can also be adopted between the solenoid valve body 1 and the inner hole 21, which is not limited here.

[0027] In this embodiment, as Figure 2 shown, the coil assembly 2 includes a second housing 22, a support member 23, and a coil 24. The second housing 22 is arranged on the valve block 3, and the second housing 22 is cylindrical. The support member 23 is arranged in the second housing 22, and an installation space is formed between the outer wall of the support member 23 and the inner wall of the second housing 22. The support member 23 forms the inner hole 21. The coil 24 is arranged in the installation space.

[0028] Specifically, the support member 23 is cylindrical, enabling the support member 23 to form an annular installation space between it and the second housing 22 and also to form an inner hole 21. In the axial direction between the mounting holes, yokes 25 are provided at both ends of the installation space. A closed space is formed among the support member 23, the yokes 25, and the second housing 22, and the coil 24 is installed in the closed space. Besides forming a stable support for the coil 24, the yokes 25 can, when used in conjunction with the coil 24, enhance the attraction force on the armature, improve the overall attraction force and working efficiency of the electromagnet, and also help reduce the leakage of magnetic lines of force, ensuring that the magnetic energy generated by the coil 24 is utilized to the maximum extent rather than dissipated into the surrounding environment.

[0029] It can be understood that by disposing the support member 23 inside the second housing 22, the coil 24 inside the mounting hole formed between the second housing 22 and the support member 23, and the second housing 22 on the valve block 3, the coil 24 and the support member 23 can be reliably fixed by the second housing 22, reducing the skew of the position of the inner hole 21 of the support member 23 caused by the skew of the second housing 22, thereby facilitating the reduction of the coaxiality deviation between the solenoid valve body 1 and the inner hole 21 of the support member 23.

[0030] In this embodiment, as Figure 2 shown, the coil assembly 2 further includes a first connection flange 26, and the first connection flange 26 is disposed on the outer wall of the second housing 22 and connected to the valve block 3.

[0031] Specifically, a third connection hole 261 is provided on the first connection flange 26, and a fourth connection hole 33 corresponding to the third connection hole 261 is provided on the valve block 3. The fourth connection hole 33 is a threaded hole, and the first connection flange 26 and the valve block 3 are connected by screws passing through the third connection hole 261 and the fourth connection hole 33. A plurality of third connection holes 261 are provided on the first connection flange 26, and fourth connection holes 33 corresponding to the third connection holes 261 one by one are provided on the valve block 3, so that the first housing 4 and the valve block 3 can be connected by a plurality of screws, improving the reliability of the connection. The first connection flange 26 can be integrally formed with the second housing 22. For example, the first connection flange 26 and the second housing 22 can be integrally formed by stamping or by injection molding. The way of integrally forming the second connection flange 43 and the second housing 22 can be selected according to needs and is not limited here. The first connection flange 26 and the second housing 22 being integrally formed can make the overall structural strength of the first connection flange 26 and the second housing 22 higher, facilitate processing, and save processes.

[0032] It can be understood that by providing the first connection flange 26, it is convenient to fix the second housing 22 on the valve block 3 through the first connection flange 26, facilitating the installation of the second housing 22.

[0033] In this embodiment, as Figure 2 shown, the solenoid valve further includes a first housing 4, the first housing 4 is connected to the valve block 3, and the first housing 4 is disposed outside the coil assembly 2 and the solenoid valve body 1.

[0034] Specifically, the first housing 4 includes a top plate 41, side plates 42 surrounding the circumference of the top plate 41, and a second connecting flange 43. The second connecting flange 43 is disposed on the outer circumference of the outer wall of the side plate 42 and is located at one end of the side plate 42 away from the top plate 41. A first connecting hole 431 is provided on the second connecting flange 43, and a second connecting hole 32 corresponding to the first connecting hole 431 is provided on the valve block 3. The second connecting hole 32 is a threaded hole, and the second connecting flange 43 and the valve block 3 are connected by screws passing through the first connecting hole 431 and the second connecting hole 32. A plurality of first connecting holes 431 are provided on the second connecting flange 43, and second connecting holes 32 corresponding to the first connecting holes 431 one by one are provided on the valve block 3, so that the first housing 4 and the valve block 3 can be connected by a plurality of screws, improving the reliability of the connection. The top plate 41, the side plates 42 and the second connecting flange 43 can be integrally formed, which can improve the overall strength of the first housing 4.

[0035] It can be understood that by providing the first housing 4 outside, protection can be formed outside components such as the coil assembly 2 and the solenoid valve body 1.

[0036] In this embodiment, an assembly method of a solenoid valve is also provided for assembling the above solenoid valve. As Figure 2 shown, the solenoid valve includes a solenoid valve body 1, a coil assembly 2 and a valve block 3. The coil assembly 2 has an inner hole 21, and the valve block 3 has an installation cavity 31. The assembly method of the solenoid valve includes the following steps:

[0037] S10, installing the solenoid valve body 1 into the inner hole 21 of the coil assembly 2 to form a valve body installation assembly.

[0038] S20, installing the solenoid valve body 1 of the valve body installation assembly into the installation cavity 31 of the valve block 3.

[0039] S30, connecting the coil assembly 2 to the valve block 3.

[0040] Specifically, the solenoid valve body 1 has a first connecting section 11 and a second connecting section 12 along its length direction. During installation, the first connecting section 11 is first installed into the inner hole 21 of the coil assembly 2 to form a valve body installation assembly, and then the second connecting section 12 is installed into the installation cavity 31 on the valve block 3.

[0041] In this embodiment, by first installing the solenoid valve body 1 in the inner hole 21 of the coil assembly 2, then installing the solenoid valve body 1 in the installation cavity 31 on the valve block 3, and connecting the coil assembly 2 to the valve block 3, the consistency of the coaxiality of the solenoid valve body 1 and the coil 24 can be ensured, and the assembly accuracy is improved, so that the electromagnetic force can be made more uniform, which is beneficial to improving the linear control accuracy of the solenoid valve, and avoids the situation where the coaxiality deviation of the solenoid valve and the coil assembly 2 is large due to error accumulation when the solenoid valve body 1 is first connected to the valve block 3 and then to the solenoid valve body 1 and the coil 24.

[0042] In this embodiment, the solenoid valve body 1 and the inner hole 21 adopt a transition fit.

[0043] It is understandable that the electromagnetic valve body 1 and the inner hole 21 are transitionally matched, so that the coaxiality deviation between the electromagnetic valve body 1 and the inner hole 21 can be smaller, thereby facilitating the improvement of assembly accuracy. In addition, the transitionally matched can reduce the damage to the electromagnetic valve body 1 and the coil assembly 2 caused by extrusion during the assembly process of the electromagnetic valve body 1 and the coil assembly 2. Of course, the electromagnetic valve body 1 and the inner hole 21 can also be interference matched, which is not limited here.

[0044] In this embodiment, the solenoid valve further includes a first housing 4 , and the assembly method of the solenoid valve further includes the following steps: connecting the first housing 4 to the valve block 3 , and the first housing 4 is located outside the valve body installation assembly.

[0045] Specifically, the first housing 4 includes a top plate 41, a side plate 42 arranged around the top plate 41, and a second connection flange 43. The second connection flange 43 is arranged around the outer wall of the side plate 42 and is located at one end of the side plate 42 away from the top plate 41. The second connection flange 43 is provided with a first connection hole 431, and the valve block 3 is provided with a second connection hole 32 corresponding to the first connection hole 431. The second connection hole 32 is a threaded hole. The second connection flange 43 and the valve block 3 are connected by screws penetrating the first connection hole 431 and the second connection hole 32. The second connection flange 43 is provided with a plurality of first connection holes 431, and the valve block 3 is provided with a second connection hole 32 corresponding to the first connection hole 431, so that the first housing 4 and the valve block 3 can be connected by a plurality of screws, thereby improving the reliability of the connection.

[0046] It can be understood that by providing the first housing 4 outside the valve body installation assembly, protection can be formed outside the coil assembly 2, the solenoid valve body 1 and other components.

[0047] In this embodiment, if Figure 2As shown in the figure, the coil assembly 2 includes a second housing 22, a support member 23, and a coil 24. The second housing 22 is disposed on the valve block 3, and the second housing 22 is cylindrical; the support member 23 is disposed within the second housing 22, and an installation space is formed between the support member 23 and the inner wall of the second housing 22. The support member 23 forms an inner hole 21; the coil 24 is disposed within the installation space.

[0048] Specifically, the support member 23 is cylindrical. The support member 23 is disposed within the second housing 22 and forms an annular installation space with the second housing 22. In the axial direction between the installation holes, yokes 25 are provided at both ends of the installation space. A closed space is formed among the support member 23, the yokes 25, and the second housing 22, and the coil 24 is installed within the closed space. In addition to providing stable support for the coil 24, the yokes 25 can, when used in conjunction with the coil 24, enhance the attraction force on the armature, improve the overall attraction force and working efficiency of the electromagnet, and also help reduce the leakage of magnetic lines of force, ensuring that the magnetic energy generated by the coil 24 is maximally utilized rather than dissipated into the surrounding environment. The specific composition of the yokes 25 is conventional prior art and will not be elaborated herein.

[0049] It can be understood that by disposing the support member 23 within the second housing 22, disposing the coil 24 within the installation hole formed between the second housing 22 and the support member 23, and disposing the second housing 22 on the valve block 3, the coil 24 and the support member 23 can be reliably fixed by the second housing 22, reducing the deviation of the position of the inner hole 21 of the support member 23 caused by the skew of the second housing 22, thereby facilitating the reduction of the coaxiality deviation between the solenoid valve body 1 and the inner hole 21 of the support member 23.

[0050] In this embodiment, as Figure 2 shown, the coil assembly 2 further includes a first connection flange 26. The first connection flange 26 is disposed on the outer wall of the second housing 22 and is connected to the valve block 3.

[0051] Specifically, a third connection hole 261 is provided on the first connection flange 26, and a fourth connection hole 33 corresponding to the third connection hole 261 is provided on the valve block 3. The fourth connection hole 33 is a threaded hole. The first connection flange 26 and the valve block 3 are connected by screws passing through the third connection hole 261 and the fourth connection hole 33. A plurality of third connection holes 261 are provided on the first connection flange 26, and fourth connection holes 33 corresponding to the third connection holes 261 one by one are provided on the valve block 3, so that the first housing 4 and the valve block 3 can be connected by a plurality of screws, improving the reliability of the connection.

[0052] It can be understood that by providing the first connection flange 26, it is convenient to fix the second housing 22 on the valve block 3 through the first connection flange 26, facilitating the installation of the second housing 22.

[0053] In this embodiment, the first connecting flange 26 and the second housing 22 are integrally formed.

[0054] For example, the first connecting flange 26 and the second housing 22 can be integrally formed by stamping or by injection molding. The way in which the second connecting flange 43 and the second housing 22 are integrally formed can be selected as needed and will not be limited herein.

[0055] It can be understood that integrally forming the first connecting flange 26 and the second housing 22 can make the overall structural strength of the first connecting flange 26 and the second housing 22 higher, facilitate processing, and save processes.

[0056] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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 should not be construed as a limitation of the present utility model.

[0057] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0058] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or capable of communicating with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0059] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0060] In the present utility model, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0061] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A solenoid valve, characterized in that: include: a coil assembly having an inner bore; A solenoid valve body, wherein the solenoid valve body has a first connecting section and a second connecting section along its length direction, and the first connecting section is installed in the inner hole; A valve block, wherein the valve block has an installation cavity, the second connecting section is installed in the installation cavity, and the coil assembly is connected to the valve block; The coil assembly comprises: A second housing, the second housing is arranged on the valve block, and the second housing is cylindrical; A support member, wherein the support member is disposed in the second shell, and an installation space is formed between an outer wall of the support member and an inner wall of the second shell, and the support member forms the inner hole; A coil, wherein the coil is disposed in the installation space; A first connecting flange is disposed on an outer wall of the second shell and connected to the valve block.

2. The solenoid valve according to claim 1, characterized in that: The first connecting section and the inner hole adopt a transition fit.

3. The solenoid valve according to claim 1, characterized in that: The first connecting flange and the second shell are integrally formed.

4. The solenoid valve according to claim 1, characterized in that: The coil assembly further includes a yoke, and the yokes are disposed at both ends of the installation space.

5. The solenoid valve according to claim 1, characterized in that: The invention also includes a first shell, which is connected to the valve block and is arranged outside the coil assembly and the electromagnetic valve body.

6. The solenoid valve according to claim 5, characterized in that: The first shell includes a top plate, a side plate arranged around the top plate, and a second connecting flange. The second connecting flange is arranged around the outer wall of the side plate and is located at one end of the side plate away from the top plate.

7. The solenoid valve according to claim 6, characterized in that: The top plate, the side plate and the second connecting flange are formed integrally.

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