Solenoid valve

Abstract

The utility model relates to the technical field of electromagnetic valves, in particular to an electromagnetic valve. The electromagnetic valve comprises a flux sleeve and a valve sleeve, a first hole is formed in the flux sleeve in the axial direction, and the hole wall of the first hole comprises a limiting section. At least part of the flux sleeve is located in the first hole, the valve sleeve comprises a threaded section, the threaded section is connected with the flux sleeve, and at least part of the valve sleeve abuts against the limiting section in the radial direction of the valve sleeve for limiting; the limiting section is close to the bottom of the first hole relative to the threaded section in the axial direction of the valve sleeve. According to the electromagnetic valve, in the radial direction of the valve sleeve, the valve sleeve and the limiting section abut against each other for limiting, so that the valve sleeve and the first hole are coaxially matched, the coaxiality during assembly of the flux sleeve and the valve sleeve is improved, and coaxial assembly can still be completed when the thread machining quality of the flux sleeve and the valve sleeve is low; the machining difficulty of the flux sleeve and the valve sleeve is reduced, and the error-tolerant rate and the assembly efficiency during assembly of the flux sleeve and the valve sleeve are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, in particular to a solenoid valve. Background Art

[0002] When assembling a solenoid valve, especially a threaded cartridge valve, the magnetic sleeve (or valve seat) has a threaded hole inside, into which one end of the valve sleeve is installed. During assembly, it is important to ensure the coaxiality of the magnetic sleeve and valve sleeve to prevent the valve sleeve from deforming and becoming stuck in the threaded hole inside the magnetic sleeve.

[0003] In existing solenoid valves, the magnetic sleeve and valve sleeve are typically secured together via threads. If the threads on the sleeve or valve sleeve have burrs or other defects, the two can become stuck or even misaligned during installation, affecting the coaxiality of the product. Utility Model Content

[0004] The purpose of the utility model is to provide a solenoid valve to improve the coaxiality of the magnetic sleeve and the valve sleeve when they are assembled, reduce the difficulty of processing the magnetic sleeve and the valve sleeve, and improve the fault tolerance and assembly efficiency when the magnetic sleeve and the valve sleeve are assembled.

[0005] To achieve this purpose, the technical solution adopted in this utility model is:

[0006] Solenoid valve, including:

[0007] A magnetic conductive sleeve, wherein the magnetic conductive sleeve is provided with a first hole along the axial direction, and the hole wall of the first hole includes a limiting section;

[0008] A valve sleeve, wherein at least a portion of the magnetic sleeve is located in the first hole, the valve sleeve includes a threaded section, the threaded section is connected to the magnetic sleeve, and along the radial direction of the valve sleeve, at least a portion of the valve sleeve abuts against the limiting section for limiting position; along the axial direction of the valve sleeve, the limiting section is close to the bottom of the first hole relative to the threaded section.

[0009] As an optional solution for the solenoid valve, the valve sleeve also includes a docking end connected to the threaded section, and the docking end is clearance-fitted with the first hole; or, the docking end is transitionally fit with the first hole; or, the docking end is interference fit with the first hole.

[0010] As an optional solution for the solenoid valve, when the butt joint end head is clearance-fitted with the first hole, the radial clearance between the butt joint end head and the inner side wall of the first hole is 0mm~0.01mm; when the butt joint end head is interference-fitted with the first hole, the radial clearance between the butt joint end head and the inner side wall of the first hole is -0.05mm~0mm.

[0011] As an alternative to the electromagnetic valve, along the axial direction of the valve sleeve, the length of the threaded segment is L1, the length of the limiting segment is L2, and L2≥1 / 2L1.

[0012] As an alternative to the electromagnetic valve, the magnetic guide sleeve is further provided with a second hole in the axial direction, the second hole and the first hole are coaxially and communicatively arranged, and the second hole has a first step surface extending radially along the magnetic guide sleeve.

[0013] The magnetic guide sleeve is provided with a positioning shoulder in the circumferential direction, the positioning shoulder has a positioning end face extending radially along the magnetic guide sleeve, and the positioning end face is attached to and abuts against the first step surface.

[0014] As an alternative to the electromagnetic valve, the circumferential side surface of the positioning shoulder is spaced apart from the inner side wall of the second hole.

[0015] As an alternative to the electromagnetic valve, the magnetic guide sleeve is further provided with a fourth hole in the axial direction, the fourth hole is in communication with the first hole, and the fourth hole and the first hole have a second step surface extending radially along the magnetic guide sleeve.

[0016] When the positioning end face is attached to and abuts against the first step surface, the axial end face of the valve sleeve is spaced apart from the second step surface.

[0017] As an alternative to the electromagnetic valve, the magnetic guide sleeve is further provided with a second hole in the axial direction, and the magnetic guide sleeve is provided with a positioning shoulder in the circumferential direction, and along the radial direction of the valve sleeve, the circumferential side surface of the positioning shoulder abuts against and limits the inner side wall of the second hole.

[0018] As an alternative to the electromagnetic valve, the magnetic guide sleeve is further provided with a fourth hole in the axial direction, one end of the fourth hole is in communication with the first hole, and the fourth hole and the first hole have a second step surface extending radially along the magnetic guide sleeve.

[0019] The valve sleeve further comprises a butt joint end head connected to the threaded segment, and along the radial direction of the valve sleeve, the circumferential side surface of the butt joint end head abuts against and limits the limiting segment; and the axial end face of the butt joint end head is attached to and abuts against the second step surface.

[0020] As an alternative to the electromagnetic valve, the second hole has a third step surface extending radially along the magnetic guide sleeve, and when the axial end face of the butt joint end head is attached to and abuts against the second step surface, the positioning shoulder is spaced apart from the third step surface.

[0021] The beneficial effects of the utility model are:

[0022] The solenoid valve proposed by the utility model has a radial direction of the valve sleeve, and the valve sleeve and the limiting section abut and limit the position to achieve coaxial cooperation between the valve sleeve and the first hole, which not only improves the coaxiality of the magnetic sleeve and the valve sleeve when they are assembled, but also enables the coaxial assembly to be completed even when the thread processing quality of the magnetic sleeve and the valve sleeve is low, reduces the processing difficulty of the magnetic sleeve and the valve sleeve, and improves the fault tolerance and assembly efficiency when the magnetic sleeve and the valve sleeve are assembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a cross-sectional view of the solenoid valve provided in Example 1 of the present utility model;

[0024] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle;

[0025] Figure 3 This is a cross-sectional view of the solenoid valve provided in Example 2 of the present utility model;

[0026] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle.

[0027] The names and numbers of the components in the figure are as follows:

[0028] 1. Magnetic sleeve; 11. First hole; 110. Second step surface; 111. Positioning section; 12. Threaded hole; 13. Second hole; 130. First step surface; 131. Third step surface; 14. Fourth hole;

[0029] 2. Valve sleeve; 21. Butt end; 22. Threaded section; 23. Positioning shoulder; 231. Positioning end face;

[0030] 3. Coil; 4. Locking ring; 5. Moving iron; 6. Spring; 7. Pin; 8. Valve core. DETAILED DESCRIPTION

[0031] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention more clearly understood, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments. It should be understood that the specific embodiments described herein are merely intended to explain the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of it.

[0032] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0033] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0034] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0035] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0036] Example 1

[0037] like Figure 1 and Figure 2As shown, this embodiment proposes a solenoid valve, which includes a magnetic sleeve 1, a valve sleeve 2, a coil 3, a locking ring 4, a moving iron 5, a spring 6, a pin 7 and a valve core 8. The coil 3 is fixedly sleeved on the outer periphery of the magnetic sleeve 1, the first axial end of the magnetic sleeve 1 is connected to the valve sleeve 2, and the locking ring 4 is threadedly connected to the second axial end of the magnetic sleeve 1 to lock the magnetic sleeve 1 and the coil 3. A fourth hole 14 is provided in the magnetic sleeve 1, and the moving iron 5 is movably installed in the fourth hole 14 along the axial direction of the magnetic sleeve 1. One end of the spring 6 abuts against the inner side of the fourth hole 14, and the other end of the spring 6 extends into the interior of one end of the moving iron 5. The other end of the moving iron 5 is connected to the valve core 8 through a pin shaft to realize the linkage between the moving iron 5 and the valve core 8. The valve core 8 is slidably installed in the valve sleeve 2 along the axial direction of the valve sleeve 2. The valve core 8 is able to slide within the valve sleeve 2 under the action of the movable iron 5 and the spring 6 to adjust the hydraulic oil circuit outside the solenoid valve, thereby adjusting the actuator controlled by the solenoid valve to complete the corresponding action. Since the structure and working principle of the solenoid valve are prior art, they will not be described in detail here.

[0038] In existing solenoid valves, the magnetic sleeve and valve sleeve are typically secured together via threads. If the threads on the sleeve or valve sleeve have burrs or other defects, the two can become stuck or even misaligned during installation, affecting the coaxiality of the product.

[0039] To address the above issues, the magnetic sleeve 1 of this embodiment defines a first hole 11 and a threaded hole 12 at its first axial end. The wall of the first hole 11 includes a limiting section 111. At least a portion of the magnetic sleeve 1 is positioned within the first hole 11. The valve sleeve 2 includes a threaded section 22 connected to the magnetic sleeve 1. In the radial direction of the valve sleeve 2, at least a portion of the valve sleeve 2 abuts against the limiting section 111 for limiting position. In the axial direction of the valve sleeve 2, the limiting section 111 is positioned relative to the threaded section 22 near the bottom of the first hole 11. In the radial direction of the valve sleeve 2, the valve sleeve 2 abuts against the limiting section 111 for limiting position, thereby achieving coaxial fit between the valve sleeve 2 and the first hole 11. This not only improves the coaxiality of the magnetic sleeve 1 and valve sleeve 2 during assembly, but also enables coaxial assembly even when the thread processing quality of the magnetic sleeve 1 and valve sleeve 2 is low. This reduces the machining difficulty of the magnetic sleeve 1 and valve sleeve 2, and improves the fault tolerance and assembly efficiency of the magnetic sleeve 1 and valve sleeve 2.

[0040] Specifically, one axial end of the valve sleeve 2 includes a connected butt joint end 21 and a threaded section 22. The threaded section 22 is installed in the threaded hole 12, and the butt joint end 21 is coaxially inserted into the first hole 11, and the outer circumference of the butt joint end 21 is in contact with the limiting section 111 of the first hole 11. When the magnetic sleeve 1 and the valve sleeve 2 are assembled, the threaded section 22 of the valve sleeve 2 is installed in the threaded hole 12 of the magnetic sleeve 1, and the butt joint end 21 of the valve sleeve 2 is coaxially inserted into the first hole 11 of the magnetic sleeve 1, and the outer circumference of the butt joint end 21 is in contact with the limiting section 111 of the first hole 11.

[0041] In this embodiment, the butt joint end 21 and the first hole 11 have a clearance fit; or a transition fit; or an interference fit. Through the clearance fit, transition fit, or interference fit between the butt joint end 21 and the first hole 11, the butt joint end 21 and the first hole 11 can achieve coaxial fit, thereby correcting the unfavorable situation during assembly of the magnetic sleeve 1 and the valve sleeve 2 (the valve sleeve 2 is stuck in the threaded hole 12 in the magnetic sleeve 1), thereby improving the coaxiality of the magnetic sleeve 1 and the valve sleeve 2 during assembly.

[0042] It should be noted that the type of fit between the butt joint end 21 and the first hole 11 depends on the machining tolerances between the butt joint end 21 and the first hole 11. Even if the butt joint end 21 and the first hole 11 have a clearance fit, the clearance between the butt joint end 21 and the first hole 11 is small due to a certain machining tolerance between the butt joint end 21 and the first hole 11, which can still correct any defects during assembly of the magnetic sleeve 1 and the valve sleeve 2.

[0043] Specifically, when the butt joint end 21 is clearance-fitted with the first hole 11, the radial clearance between the butt joint end 21 and the inner sidewall of the first hole 11 is 0 mm to 0.01 mm. By setting the radial clearance between the butt joint end 21 and the first hole 11 in the clearance-fitting state within the range of 0.01 mm, the outer circumferential surface of the butt joint end 21, which has a certain processing error, is in contact with the inner sidewall of the first hole 11, thereby ensuring the coaxiality of the butt joint end 21 and the first hole 11. In another embodiment, when the butt joint end 21 is interference-fitted with the first hole 11, the radial clearance between the butt joint end 21 and the inner sidewall of the first hole 11 is -0.05 mm to 0 mm. By setting the radial clearance between the butt joint end 21 and the first hole 11 in the interference-fitting state within the range of -0.05 mm, the outer circumferential surface of the butt joint end 21, which has a certain processing error, is in contact with the inner sidewall of the first hole 11, thereby ensuring the coaxiality of the butt joint end 21 and the first hole 11.

[0044] In this embodiment, along the axial direction of the valve sleeve 2, the length of the threaded section 22 is L1, and the length of the limiting section 111 is L2. Therefore, L2 ≥ 1 / 2L1, so that the limiting section 111 can achieve guidance and correction of the valve sleeve 2 through coaxial cooperation with the docking end head 21, thereby preventing the valve sleeve 2 from getting stuck in the threaded hole 12 in the magnetic sleeve 1. When L2 ≥ L1, before the valve sleeve 2 is threadedly connected to the threaded hole 12, the docking end head 21 can abut and limit the limiting section 111, thereby improving the guidance and correction effect on the valve sleeve 2.

[0045] like Figure 2As shown, the magnetic sleeve 1 further has a second hole 13 axially defined therein. The second hole 13 is coaxial with and communicates with the first hole 11. Specifically, one end of the second hole 13 extends through the first end, and the other end of the second hole 13 communicates with the end of the threaded hole 12 remote from the first hole 11, thereby sequentially communicating with the first hole 11, the threaded hole 12, and the second hole 13. The second hole 13 includes a first stepped surface 130 extending radially along the magnetic sleeve 1. The magnetic sleeve 1 is circumferentially provided with a positioning shoulder 23. The positioning shoulder 23 includes a positioning end surface 231 extending radially along the magnetic sleeve 1, which abuts against the first stepped surface 130. In this embodiment, the second hole 13 is a stepped hole, and the inner wall of the second hole 13 includes a first stepped surface 130. By abutting the positioning end surface 231 of the positioning shoulder 23 against the first stepped surface 130, the insertion direction of the valve sleeve 2 remains parallel to the axial direction of the magnetic sleeve 1, further improving the coaxiality of the magnetic sleeve 1 and the valve sleeve 2 during assembly.

[0046] Furthermore, if Figure 2 As shown, the circumferential side surface of the positioning shoulder 23 is spaced apart from the inner side wall of the second hole 13, and a first gap h1 is provided between the circumferential side surface of the positioning shoulder 23 and the inner side wall of the second hole 13, so as to avoid the circumferential side surface of the positioning shoulder 23 from abutting against the inner side wall of the second hole 13, thereby ensuring that the positioning shoulder 23 and the magnetic sleeve 1 are in contact only through the positioning end surface 231 being in contact with the first step surface 130, so as to improve the coaxiality of the magnetic sleeve 1 and the valve sleeve 2 when assembled.

[0047] like Figure 1 and Figure 2 As shown, the fourth hole 14 is coaxially arranged with the magnetic sleeve 1. One end of the fourth hole 14 is connected to the end of the first hole 11 away from the threaded hole 12, and a second step surface 110 extending radially along the magnetic sleeve 1 is provided between the fourth hole 14 and the first hole 11. When the positioning end surface 231 is in contact with and abuts the first step surface 130, the axial end surface of the valve sleeve 2 (i.e., the docking end head 21) is spaced apart from the second step surface 110, and a second gap h2 is provided between the axial end surface of the docking end head 21 and the second step surface 110. Through the above arrangement, when the positioning end surface 231 abuts the first step surface 130, there is still a margin between the axial end surface of the docking end head 21 and the second step surface 110, thereby preventing the docking end head 21 from being too long and damaging the abutment between the positioning end surface 231 and the first step surface 130.

[0048] Example 2

[0049] like Figure 3 and Figure 4As shown, this embodiment provides a solenoid valve that is essentially the same as that in the first embodiment, with the main difference being that the magnetic sleeve 1 of this embodiment further defines a second hole 13 along the axial direction. One end of the second hole 13 extends through the first end, and the other end of the second hole 13 communicates with the end of the threaded hole 12 distal from the first hole 11. A positioning shoulder 23 is circumferentially provided on the magnetic sleeve 1. Along the radial direction of the valve sleeve 2, the circumferential side surface of the positioning shoulder 23 abuts against the inner wall of the second hole 13 for limiting position.

[0050] In this embodiment, the valve sleeve 2 further includes a butt joint end 21 connected to the threaded section 22. Along the radial direction of the valve sleeve 2, the circumferential side surface of the butt joint end 21 abuts against the limiting section 111 for limiting position. In addition to the coaxial fit between the butt joint end 21 and the first hole 11, a coaxial fit between the positioning shoulder 23 and the second hole 13 is added. These two coaxial fits together provide coaxial constraint during assembly of the magnetic sleeve 1 and the valve sleeve 2, thereby improving the coaxiality of the two assembled bodies.

[0051] Furthermore, if Figure 4 As shown, a fourth hole 14 is further defined within the magnetic sleeve 1. One end of the fourth hole 14 communicates with the end of the first hole 11 distal from the threaded hole 12. A second stepped surface 110 extending radially along the magnetic sleeve 1 is defined between the fourth hole 14 and the first hole 11. The axial end surface of the docking terminal 21 abuts against the second stepped surface 110. This abutment between the axial end surface of the docking terminal 21 and the second stepped surface 110 ensures that the insertion direction of the valve sleeve 2 remains parallel to the axial direction of the magnetic sleeve 1, further improving the coaxiality of the magnetic sleeve 1 and valve sleeve 2 during assembly.

[0052] like Figure 4 As shown, the second hole 13 has a third stepped surface 131 extending radially along the magnetic sleeve 1. When the axial end surface of the mating end 21 abuts the second stepped surface 110, the positioning shoulder 23 is spaced apart from the third stepped surface 131, and a third gap h3 is defined between the positioning shoulder 23 and the third stepped surface 131. In this embodiment, the second hole 13 is connected to the threaded hole 12 as a stepped hole. This arrangement ensures that when the mating end 21 abuts the second stepped surface 110, there is still a margin between the positioning shoulder 23 and the third stepped surface 131, preventing the positioning shoulder 23 from disrupting the abutting fit between the mating end 21 and the second stepped surface 110.

[0053] The above embodiments merely illustrate the basic principles and features of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications are possible without departing from the spirit and scope of the present invention. Such changes and modifications are within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. Solenoid valve, characterized in that, include: A magnetic conductive sleeve (1), wherein the magnetic conductive sleeve (1) is provided with a first hole (11) along the axial direction, and the hole wall of the first hole (11) includes a limiting section (111); A valve sleeve (2), wherein at least a portion of the magnetic sleeve (1) is located in the first hole (11), the valve sleeve (2) comprises a threaded section (22), the threaded section (22) is connected to the magnetic sleeve (1), and along the radial direction of the valve sleeve (2), at least a portion of the valve sleeve (2) and the limiting section (111) are in contact with each other for limiting position; along the axial direction of the valve sleeve (2), the limiting section (111) is close to the bottom of the first hole (11) relative to the threaded section (22).

2. The solenoid valve according to claim 1, characterized in that The valve sleeve (2) further comprises a butt joint end head (21) connected to the threaded section (22), wherein the butt joint end head (21) and the first hole (11) have a clearance fit; or, the butt joint end head (21) and the first hole (11) have a transition fit; or, the butt joint end head (21) and the first hole (11) have an interference fit.

3. The solenoid valve according to claim 2, characterized in that When the butt joint end (21) and the first hole (11) are clearance-fitted, the radial clearance between the butt joint end (21) and the inner side wall of the first hole (11) is 0 mm to 0.01 mm; when the butt joint end (21) and the first hole (11) are interference-fitted, the radial clearance between the butt joint end (21) and the inner side wall of the first hole (11) is -0.05 mm to 0 mm.

4. The solenoid valve according to claim 1, characterized in that Along the axial direction of the valve sleeve (2), the length of the threaded section (22) is L1, and the length of the limiting section (111) is L2, and L2 ≥ 1 / 2L1.

5. The solenoid valve according to claim 1, characterized in that The magnetic conductive sleeve (1) further has a second hole (13) along the axial direction, the second hole (13) and the first hole (11) are coaxial and connected, and the second hole (13) has a first step surface (130) extending radially along the magnetic conductive sleeve (1); The magnetic sleeve (1) is provided with a positioning shoulder (23) along the circumferential direction, and the positioning shoulder (23) has a positioning end surface (231) extending radially along the magnetic sleeve (1), and the positioning end surface (231) is attached to and abuts against the first step surface (130).

6. The solenoid valve according to claim 5, characterized in that The circumferential side surface of the positioning shoulder (23) is spaced apart from the inner side wall of the second hole (13).

7. The solenoid valve according to claim 5, characterized in that The magnetic conductive sleeve (1) is further provided with a fourth hole (14) along the axial direction, the fourth hole (14) is communicated with the first hole (11), and a second step surface (110) extending radially along the magnetic conductive sleeve (1) is provided between the fourth hole (14) and the first hole (11); When the positioning end surface (231) is in contact with and abuts against the first step surface (130), the axial end surface of the valve sleeve (2) is spaced apart from the second step surface (110).

8. The solenoid valve according to claim 1, characterized in that The magnetic sleeve (1) is further provided with a second hole (13) along the axial direction, and the magnetic sleeve (1) is provided with a positioning shoulder (23) along the circumferential direction. Along the radial direction of the valve sleeve (2), the circumferential side surface of the positioning shoulder (23) abuts against the inner side wall of the second hole (13) for limiting position.

9. The solenoid valve according to claim 8, characterized in that The magnetic conductive sleeve (1) is further provided with a fourth hole (14) along the axial direction, one end of the fourth hole (14) is connected to the first hole (11), and a second step surface (110) extending radially along the magnetic conductive sleeve (1) is provided between the fourth hole (14) and the first hole (11); The valve sleeve (2) further comprises a butt joint end head (21) connected to the threaded section (22); along the radial direction of the valve sleeve (2), the circumferential side surface of the butt joint end head (21) abuts against the limiting section (111) for limiting position; and the axial end surface of the butt joint end head (21) is in contact with and abuts against the second step surface (110).

10. The solenoid valve according to claim 9, characterized in that The second hole (13) has a third step surface (131) extending radially along the magnetic sleeve (1); when the axial end surface of the docking end (21) is in contact with and abuts against the second step surface (110), the positioning shoulder (23) is spaced apart from the third step surface (131).

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