Electromagnetic coil assembly and valve device

Abstract

The utility model provides a kind of electromagnetic coil assembly and valve device, electromagnetic coil assembly includes magnetic conducting piece, the anti-drop piece of fixedly arranged in magnetic conducting piece and the excitation member rotatably sheathed in magnetic conducting piece, magnetic conducting piece includes limiting portion, and the clamping area is formed between anti-drop piece and limiting portion, and excitation member includes clamped portion, and the stop position of excitation member relative to magnetic conducting piece includes limited position and unlocking position;When excitation member is in limited position, clamped portion is located clamping area and is clamped by anti-drop piece and limiting portion, and at least one of anti-drop piece and limiting portion is concave-convex connection with clamped portion;When excitation member is in unlocking position, clamped portion leaves clamping area.

Description

Technical Field

[0001] This utility model relates to the field of fluid control equipment technology, and in particular to an electromagnetic coil assembly and valve device. Background Technology

[0002] Electromagnetic coil assemblies are widely used in many products. Taking the application of electromagnetic coil assemblies in valve devices as an example: simplifying the assembly and disassembly of electromagnetic coil assemblies, reducing the tools and connectors used in disassembly and assembly, and making the disassembly and assembly of electromagnetic coil assemblies as simple as possible by hand, thereby reducing the time, difficulty and cost of valve device disassembly and assembly, are the key points for optimizing valve devices. Utility Model Content

[0003] In view of this, the present invention provides an electromagnetic coil assembly and valve device that is simple to assemble and disassemble and can be completed without the use of fasteners and fastening tools.

[0004] The electromagnetic coil assembly of this utility model includes a magnetic conductor, an anti-detachment component fixed to the magnetic conductor, and an excitation component rotatably sleeved on the magnetic conductor. The magnetic conductor includes a limiting part, and a clamping area is formed between the anti-detachment component and the limiting part. The excitation component includes a clamped part, and the stopping positions of the excitation component relative to the magnetic conductor include a limited position and an unlocked position. When the excitation component is in the limited position, the clamped part is located in the clamping area and is clamped by the anti-detachment component and the limiting part. At least one of the anti-detachment component and the limiting part is in concave-convex connection with the clamped part. When the excitation component is in the unlocked position, the clamped part leaves the clamping area.

[0005] The electromagnetic coil assembly of this invention is easier to disassemble and assemble by hand, without the need for additional fasteners and tools.

[0006] First, rotate the exciter until it switches to the unlocked position. Then, put the exciter onto the guide magnet. Next, rotate the exciter by hand until it switches to the restricted position. When the anti-disengagement part and the limiting part clamp the clamped part, the axial movement freedom of the exciter relative to the guide magnet is restricted. The clamped part and the anti-disengagement part restrict the exciter's rotation freedom around the guide magnet through the concave-convex connection. This completes the assembly of the electromagnetic coil assembly. The anti-disengagement part and the limiting part cooperate to replace the fastener.

[0007] When disassembling the electromagnetic coil assembly, first rotate the excitation component located in the restricted position to the unlocked position by hand. Then, manually move the excitation component along the axial direction of the magnetic conductor. The clamped part leaves the clamping area, thereby canceling the blocking and anti-rotation effect of the anti-detachment component on the clamped part. In this way, the excitation component can be removed from the magnetic conductor without the need to apply force to the anti-detachment component or the excitation component with external tools.

[0008] In some embodiments, the excitation element includes a magnetic guide frame, and the clamping portion is formed on the magnetic guide frame.

[0009] In some embodiments, the magnetic guide frame includes a bottom cover and a top cover forming a clamping portion. When the excitation element is in the restricted position, the anti-disengagement member abuts against the side of the top cover opposite to the bottom cover, and the limiting portion abuts against the side of the top cover near the bottom cover.

[0010] In some embodiments, the magnetic conductor includes a bracket and a magnetic body mounted on the end of the bracket. The excitation component is rotatably sleeved on the bracket, and the magnetic body abuts against one end of the top cover to form a limiting portion and is fixed with an anti-detachment component.

[0011] In some embodiments, the magnetic conductor further includes an elastic element that connects the support and the magnetic conductor, with the outer peripheral side of the magnetic conductor slidingly engaged with the inner wall of the support.

[0012] In some embodiments, the exciter has a clearance hole for the anti-detachment component to extend out, the anti-detachment component forms a stop projection in the cross-sectional surface of the magnetic conductor, the clamped part forms a clamped projection in the cross-sectional surface, and the cross-sectional surface intersects with the axis of the magnetic conductor.

[0013] When the excitation component is in the unlocked position, the clearance hole defines the first empty space in the cross-sectional surface, the stop projection is located in the first empty space, and the stop projection and the clamped projection do not overlap.

[0014] When the excitation component is in the restricted position, the clearance hole defines a second space within the cross-sectional surface. A portion of the stop projection extends beyond the second space and forms an overlapping area with the clamped projection.

[0015] In some embodiments, the excitation element is further provided with a sleeve hole for the magnetic conductor to pass through and communicates with the clearance hole. The sleeve hole defines a third space within the cross-sectional surface, and the stop projection is located in the third space.

[0016] In some embodiments, the limiting portion forms a limiting projection within the cross-sectional plane, and the limiting projection and the clamped projection form an overlapping area.

[0017] In some embodiments, the anti-detachment component includes a rod and a stop. One end of the rod is connected to a magnetic conductor, and the other end extends out of the clearance hole and is provided with a stop. A clamping area is formed between the stop and the limiting part. One side of the clamped part abuts against the limiting part, and the other side abuts against the stop.

[0018] When the excitation component is in the restricted position, the clamped part is connected to at least one of the rod part, the stop part, and the limiting part.

[0019] In some embodiments, one of the anti-detachment component and the clamped part is provided with a positioning groove, and the other is fixed with a positioning protrusion. When the excitation component is in the restricted position, the positioning protrusion is embedded in the positioning groove.

[0020] In some embodiments, one of the anti-detachment component and the clamped part is provided with a positioning groove, and the other is provided with a spring component and a locking block. When the excitation component is in the restricted position, the spring component drives the locking block to embed into the positioning groove.

[0021] In some embodiments, one of the anti-detachment component and the clamped part is provided with a positioning groove, and the other is provided with a positioning plug detachably. When the excitation component is in the restricted position, the positioning plug is inserted into the positioning groove.

[0022] The valve device of this utility model includes a valve body and an electromagnetic coil assembly, with the magnetic conductive element disposed on the valve body. Attached Figure Description

[0023] Figure 1 This is a perspective view of a valve device according to one embodiment of the present invention;

[0024] Figure 2 This is a three-dimensional schematic diagram of the magnetic conductor of an electromagnetic coil assembly according to one embodiment of the present invention.

[0025] Figure 3 A three-dimensional schematic diagram of the magnetic guide frame of an electromagnetic coil assembly according to one embodiment of the present invention;

[0026] Figure 4 This is a three-dimensional schematic diagram of an electromagnetic coil assembly according to one embodiment of the present invention.

[0027] Figure 5 for Figure 4 The diagram shows a partially enlarged view of the electromagnetic coil assembly at point A.

[0028] Figure 6 This is a cross-sectional view of an electromagnetic coil assembly according to one embodiment of the present invention.

[0029] Explanation of reference numerals in the attached drawings: 100, electromagnetic coil assembly; 10, magnetic conductor; 11, bracket; 110, limiting part; 12, magnetic conductor; 121, mounting hole; 13, elastic element; 20, anti-detachment element; 21, rod; 22, stop part; 23, positioning protrusion; 30, excitation element; 31, coil; 310, sleeve hole; 32, magnetic conductor frame; 321, top cover; 3211, clearance hole; 3212, positioning groove; 3213, stop tooth; 322, bottom cover; 3221, through hole; 323, side cover; 200, valve device; 210, valve body. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] This utility model provides an electromagnetic coil assembly 100 and a valve device 200 including the electromagnetic coil assembly 100. The electromagnetic coil assembly 100 is widely used in various devices and equipment. The valve device 200 can be a four-way valve or other types of valves.

[0033] The electromagnetic coil assembly 100 of this utility model is suitable for manual disassembly and installation by personnel without the need for external disassembly and fastening tools. It aims to reduce the difficulty of disassembly and maintenance of the electromagnetic coil assembly 100, shorten the disassembly and maintenance time, and save disassembly and maintenance costs.

[0034] See Figure 1 , Figure 4 and Figure 6 The electromagnetic coil assembly 100 includes a magnetic conductor 10, an anti-detachment component 20 fixedly disposed on the magnetic conductor 10, and an excitation component 30 rotatably sleeved on the magnetic conductor 10; the valve device 200 also includes a valve body 210. Figure 1 The valve device 200 shown is a four-way valve, and the valve device 200 also includes an inlet pipe and three outlet pipes disposed on the valve body 210.

[0035] The magnetic conductor 10 includes a bracket 11 and a magnetic conductor 12. One end of the bracket 11 is fixed to the valve body 210, and the magnetic conductor 12 is installed at the end of the bracket 11 away from the valve body 210. Optionally, the bracket 11 and the magnetic conductor 12 are coaxial, and the axis of the bracket 11 is the axis of the magnetic conductor 10.

[0036] See Figure 2 and Figure 3 , Figure 6 The support 11 is a hollow tube, and the magnetic conductor 12 is cylindrical. The magnetic conductor 12 is fixedly connected to the support 11 or movably connected. The end of the magnetic conductor 12 facing out of the tube opening of the support 11 is flush with or higher than the end of the magnetic conductor 12 that is relatively far away from the valve body 210. The end of the magnetic conductor 12 facing out of the tube opening of the support 11 is the end of the magnetic conductor 12 that is relatively far away from the valve body 210.

[0037] The excitation element 30 includes a coil 31 and a magnetic guide frame 32 that houses the coil 31. (See also...) Figures 3-4 , Figure 6In some embodiments, the coil 31 has a sleeve hole 310, and the magnetic guide frame 32 has a through hole 3221 that communicates with the sleeve hole 310 on the side near the valve body 210. The excitation element 30 is sleeved on the bracket 11 through the through hole 3221 and the sleeve hole 310 and can rotate around the axis of the bracket 11. The end of the magnetic guide element 10 that is relatively far away from the valve body 210 passes through the through hole 3221 and the sleeve hole 310 in sequence.

[0038] Optionally, the excitation element 30 is coaxial with the magnetic conductor 10, and the sleeve hole 310 and the through hole 3221 are coaxial with the bracket 11.

[0039] The anti-detachment component 20 is fixedly connected to the end of the magnetic conductor 10 that is relatively far away from the valve body 210. In some embodiments, the anti-detachment component 20 is fixedly connected to the end of the magnetic conductor 12 facing outward from the port of the bracket 11; in other embodiments, the anti-detachment component 20 is fixedly connected to the end of the bracket 11 that is relatively far away from the valve body 210.

[0040] See Figures 4-6 The anti-detachment component 20 includes a stop portion 22 and a rod portion 21 that are fixedly connected. The end of the magnetic conductor 12 facing the outside of the tube opening of the bracket 11 has a mounting hole 121 for inserting one end of the rod portion 21. The other end of the rod portion 21 extends out of the magnetic conductor frame 32 and is connected to the side of the stop portion 22.

[0041] In some embodiments, the length of the stop portion 22 is greater than the outer diameter of the rod portion 21, and the end of the stop portion 22 protrudes from the outer peripheral side of the rod portion 21 and abuts against the side of the exciter 30 that is relatively far away from the valve body 210. The stop portion 22 stops the exciter 30 and restricts the exciter 30 from moving away from the valve body 210 along the axial direction of the bracket 11, so as to prevent the exciter from leaving the magnetic conductor 10.

[0042] In other embodiments, the stop portion 22 and the rod portion 21 are integrally formed structures. The length of the stop portion 22 does not need to be greater than the outer diameter of the rod portion 21, as long as the end of the stop portion 22 protrudes from the outer periphery of the rod portion 21 and abuts against the side of the excitation element 30 that is relatively far away from the valve body 210.

[0043] The magnetic guide 10 includes a limiting part 110, which is used to block the excitation element 30 and thus limit the degree of freedom of movement of the excitation element 30 to move further towards the valve body 210 along the axial direction. When the depth of the magnetic guide 10 penetrating into the excitation element 30 reaches the maximum, the distance between the end of the magnetic guide 10 that is relatively far away from the valve body 210 and the through hole 3221 reaches the maximum, and the distance between the excitation element 30 and the valve body 210 reaches the minimum. At this time, the excitation element 30 is in the sleeve limit position and is blocked by the limiting part 110.

[0044] The stopping positions of the exciter 30 when rotating relative to the magnetic conductor 10 include a restricted position and an unlocked position. The exciter 30 switches between the restricted position and the unlocked position by rotating around the axis of the bracket 11. The rotation of the exciter 30 around the axis of the bracket 11 and the fitting of the exciter 30 to the magnetic conductor 10 through the through hole 3221 and the sleeve hole 310 can both be done by hand without the need for external tools to apply force to the exciter 30.

[0045] Preferably, the sleeve hole 310 is clearance-fitted with the magnetic conductive element 10, and the through hole 3221 is clearance-fitted with the magnetic conductive element 10.

[0046] The limiting part 110 and the anti-detachment member 20 are spaced apart along the axial direction of the bracket 11 to form a clamping area. When the exciter 30 is in the limited position, at least a portion of the exciter 30 is fixedly clamped in the clamping area by the anti-detachment member 20 and the limiting part 110. When the exciter 30 is in the unlocked position, the exciter 30 completely leaves the clamping area. For ease of description, the portion of the exciter 30 located in the clamping area and clamped by the anti-detachment member 20 and the limiting part 110 is referred to as the clamped portion. Therefore, when the exciter 30 is in the unlocked position, the clamped portion completely leaves the clamping area.

[0047] With this configuration, the exciter 30 is fixed axially on the magnetic conductor 10. When in the restricted position, the exciter 30 is stopped by the limiting part 110 and cannot approach the valve body 210 along the axial direction of the magnetic conductor 10. Simultaneously, it is stopped by the anti-disengagement part 20 and cannot move away from the valve body 210 along the axial direction of the magnetic conductor 10. The limiting part 110 stopping the exciter 30 indicates that the exciter 30 has reached its maximum mounting position. Afterward, personnel can manually rotate the exciter 30 around the axis of the bracket 11 to switch the exciter 30 from the unlocked position to the restricted position.

[0048] The clamped portion includes a first force-bearing side and a second force-bearing side disposed opposite to each other. The first force-bearing side is the side of the excitation element 30 that is relatively far away from the valve body 210. When a portion of the clamped portion is located within the clamping area and is clamped by the anti-disengagement member 20 and the limiting member 110, the anti-disengagement member 20 abuts against the first force-bearing side, and the limiting member 110 abuts against the second force-bearing side. Optionally, the clamped portion is formed on the magnetic guide frame 32.

[0049] In some embodiments, when a portion of the clamped part is located within the clamping area and is clamped by the anti-detachment member 20 and the limiting member 110, the anti-detachment member 20 and the clamped part are in a concave-convex connection; in other embodiments, when a portion of the clamped part is located within the clamping area and is clamped by the anti-detachment member 20 and the limiting member 110, the limiting member 110 and the clamped part are in a concave-convex connection; in still other embodiments, when a portion of the clamped part is located within the clamping area and is clamped by the anti-detachment member 20 and the limiting member 110, the anti-detachment member 20 and the clamped part are in a concave-convex connection, and the limiting member 110 and the clamped part are in a concave-convex connection.

[0050] Taking the anti-detachment member 20 and the clamped part with a concave-convex connection as an example, the concave-convex connection means that one of the anti-detachment member 20 and the clamped part has a protruding structure that is embedded in the other. By connecting the anti-detachment member 20 and the limiting part 110 with the clamped part with a concave-convex connection, the degree of freedom of the excitation member 30 to rotate around the axis of the magnetic conductor 10 is restricted, thereby achieving relative fixation between the excitation member 30 and the magnetic conductor 10.

[0051] In some embodiments, the limiting portion 110 is formed at the end of the magnetic conductor 10 that is relatively far from the valve body 210. The first force-bearing side and the second force-bearing side are arranged opposite to each other along the axial direction of the magnetic conductor 10. The stop portion 22 and the limiting portion 110 are spaced apart along the axial direction of the magnetic conductor 10, and the gap area between them forms a clamping area. When a part of the clamped part is located in the clamping area and is clamped by the anti-disengagement member 20 and the limiting portion 110, the stop portion 22 abuts against the first force-bearing side. When the excitation member 30 is in the unlocked position and the limiting portion 110 is still abutting against the second force-bearing side, the stop portion 22 completely leaves the first force-bearing side. At this time, the clamped part is completely withdrawn from the gap area between the stop portion 22 and the limiting portion 110.

[0052] When the exciter 30 is stopped by the limiting part 110, when the exciter 30 rotates to the limited position, the anti-detachment part 20 stops the exciter 30. At this time, the degree of freedom of the exciter 30 to move away from the valve body 210 along the axial direction of the magnetic conductor 10 is restricted, and the depth of the exciter 30 sleeved on the magnetic conductor 10 remains at the maximum and cannot be reduced. The limiting part 110 and the anti-detachment part 20 cooperate to restrict the degree of freedom of the exciter 30 to move along the axial direction of the magnetic conductor 10, and the distance between the exciter 30 and the valve body 210 remains fixed.

[0053] When the exciter 30 rotates around the axis of the bracket 11 to the unlocked position, the anti-disengagement component 20 releases the stop on the exciter 30, thereby allowing the exciter 30 in the unlocked position to move away from the valve body 210 along the axial direction of the magnetic guide 10. During the process of the exciter 30 moving away from the valve body 210 along the axial direction of the magnetic guide 10, the depth of the exciter 30 sleeved on the magnetic guide 10 gradually decreases, that is, the size of the magnetic guide 10 extending into the exciter 30 gradually decreases, and finally the exciter 30 disengages from the magnetic guide 10.

[0054] During the process of assembling and disassembling the excitation component 30 and the magnetic conductor 10, the anti-detachment component 20 remains fixedly connected to the magnetic conductor 10, and there is no need to move the anti-detachment component 20.

[0055] If the anti-disengagement component 20 and the excitation component 30 located in the unlocked position are projected onto the cross-sectional surface of the magnetic guide component 10 in the same direction, and the cross-sectional surface is a plane perpendicular to the axis of the bracket 11, then the projections of the anti-disengagement component 20 and the excitation component 30 on the cross-sectional surface will not overlap; if the anti-disengagement component 20 and the excitation component 30 located in the restricted position are projected onto the cross-sectional surface of the magnetic guide component 10 in the same direction, then the projections of the anti-disengagement component 20 and the excitation component 30 on the cross-sectional surface will create an overlapping area.

[0056] Specifically, the exciter 30 has a clearance hole 3211 on the side of the exciter 30 that is relatively far away from the valve body 210. The anti-disengagement member 20 passes through the through hole 3221 and the sleeve hole 310 along with the magnetic guide member 10. When the exciter 30 reaches the sleeve limit position and is in the unlocked position, the end of the rod 21 that is far away from the magnetic guide member 10 and the stop part 22 extend out of the clearance hole 3211. When the exciter 30 rotates around the axis of the bracket 11 to the restricted position, the stop part 22 abuts against the side of the exciter 30 that is relatively far away from the valve body 210.

[0057] To facilitate the installation of the magnetic guide 10 on the excitation component 30, the projection of the sleeve hole 310 onto the cross-sectional surface of the magnetic guide 10 defines the third spatial domain. The anti-detachment component 20 is projected onto the cross-sectional surface of the magnetic guide 10 to form a stop projection, which is located within the third spatial domain.

[0058] With this configuration, whether the excitation element 30 is manually fitted onto the guide magnet 10 or the excitation element 30 is manually removed from the guide magnet 10, the anti-detachment element 20 can pass smoothly through the sleeve hole 310, and the anti-detachment element 20 will not interfere with the inner wall of the sleeve hole 310.

[0059] When the excitation component 30 is in the unlocked position, the clearance hole 3211 defines a first empty space in the truncated axial surface, the stop projection is located in the first empty space, and the stop projection and the clamped projection do not overlap. The clamped projection refers to the orthographic projection of the clamped part in the truncated axial surface.

[0060] With this configuration, the anti-detachment component 20 can smoothly pass through the clearance hole 3211 along the axial direction of the magnetic conductor 10 without interfering with the excitation component 30.

[0061] When the excitation element 30 is in the restricted position, the clearance hole 3211 defines a second space in the truncated axial surface. A portion of the stop projection extends beyond the second space, and the portion of the stop projection extending beyond the second space forms an overlapping area with the clamped projection. The area of ​​the stop portion 22 that abuts against the first force-bearing side corresponds to this overlapping area.

[0062] Furthermore, the orthographic projection of the limiting part 110 in the cross-sectional plane of the magnetic conductor 10 forms a limiting projection, and the limiting projection and the clamped projection form an overlapping surface region, which corresponds to the clamping area.

[0063] Optionally, such as Figures 3-4 , Figure 6 As shown, the magnetic guide frame 32 includes a top cover 321, a bottom cover 322, and two side covers 323. The clamped part includes at least the top cover 321. The first force-bearing side is the side of the top cover 321 facing away from the bottom cover 322. The end of the coil 31 away from the valve body 210 is opposite to the side of the top cover 321 near the bottom cover 322. The other end of the coil 31 near the valve body 210 is opposite to the side of the bottom cover 322 near the top cover 321. The two side covers 323 are located on the outer periphery of the coil 31 and connected to the top cover 321. 21 and bottom cover 322, top cover 321 forms the side of excitation element 30 that is relatively far away from valve body 210 on the side opposite to bottom cover 322, bottom cover 322 forms the side of excitation element 30 that is relatively close to valve body 210, through hole 3221 is opened in bottom cover 322 and clearance hole 3211 is opened in top cover 321, through hole 3221 and sleeve hole 310 can be circular holes so that magnetic guide frame 32 and coil 31 can rotate around the axis of bracket 11, clearance hole 3211 is rectangular, elliptical or oblong.

[0064] Furthermore, the stop portion 22 is a rectangular, elliptical, or oblong baffle structure. The length of the stop portion 22 is less than or equal to the length of the clearance hole 3211, and greater than the width of the clearance hole 3211. The width of the stop portion 22 is less than or equal to the width of the clearance hole 3211. When the exciter 30 is in the unlocked position, the length direction of the stop portion 22 is basically consistent with the length direction of the clearance hole 3211, and the stop portion 22 and the rod portion 21 can freely pass through the clearance hole 3211. When the exciter 30 is in the restricted position, the length direction of the stop portion 22 is perpendicular to the length direction of the clearance hole 3211, such as... Figures 4-5 As shown, the two ends of the stop portion 22 protrude from the outer periphery of the rod portion 21 and abut against the side of the top cover 321 opposite to the bottom cover 322.

[0065] like Figures 4-5 As shown, when the excitation component 30 is in the restricted position, both ends of the stop part 22 abut against the side of the top cover 321 opposite to the bottom cover 322, which can make the two ends of the stop part 22 bear equal force, the force on the anti-detachment component 20 tends to be balanced, and prevent the rod part 21 from tilting relative to the magnetic conductor 10.

[0066] In other embodiments, the length of the stop portion 22 need not be greater than the width of the clearance hole 3211. When the exciter 30 is in the unlocked position, an angle can also be formed between the length direction of the stop portion 22 and the length direction of the clearance hole 3211, as long as the stop portion 22 is allowed to freely pass through the clearance hole 3211 along the axial direction of the magnetic conductor 10. When the exciter 30 is in the restricted position, the length direction of the stop portion 22 does not need to be perpendicular to the length direction of the clearance hole 3211, as long as at least one end of the stop portion 22 protrudes from the outer periphery of the rod portion 21 and can abut against the side of the top cover 321 opposite to the bottom cover 322.

[0067] Preferably, the distance from the position of the stop 22 connecting to the rod 21 to both ends of the stop 22 is equal. The rod 21, the bracket 11, the sleeve hole 310, and the through hole 3221 are coaxial. When the exciter 30 is sleeved on the magnetic conductor 10, the axis of the bracket 11 passes through the geometric center of the clearance hole 3211. When the exciter 30 is in the restricted position, the clamped projection and the orthographic projections of the two ends of the stop 22 on the cross-sectional plane form two overlapping surface regions. The two overlapping surface regions are symmetrically distributed on both sides of the second space. The positions of the two ends of the stop 22 acting on the top cover 321 correspond to the two overlapping surface regions, and the pressures exerted by the two ends of the stop 22 on the top cover 321 are equal. The exciter 30 can switch from the restricted position to the unlocked position by rotating 90° around the axis of the bracket 11.

[0068] In order to make it easier to fit the magnetic conductor 10 onto the excitation component 30, the two ends of the coil 31 abut against the top cover 321 and the bottom cover 322 respectively, and the top cover 321 and the bottom cover 322 clamp and fix the coil 31.

[0069] With this configuration, the perforation 3221 and the sleeve 310 are less likely to shift relative to each other, and their coaxiality can be guaranteed. This avoids interference and friction between the coil 31 and the magnetic conductor 10 caused by coaxiality deviation between the perforation 3221 and the sleeve 310.

[0070] In some embodiments, one of the anti-detachment component 20 and the clamped part is provided with a positioning groove 3212, and the other is fixed with a positioning protrusion 23. When the exciter 30 is in the restricted position, the positioning protrusion 23 is embedded in the positioning groove 3212 to restrict the rotation of the exciter 30. The anti-detachment component 20 and the clamped part form a concave-convex connection by the positioning protrusion 23 being embedded in the positioning groove 3212.

[0071] With this configuration, when the excitation element 30 is in the restricted position, the positioning protrusion 23 can restrict the degree of freedom of the excitation element 30 to rotate relative to the magnetic conductor 10 around the axis of the bracket 11, thereby confining the excitation element 30 to the restricted position, preventing the excitation element 30 from accidentally rotating from the restricted position to the unlocked position under external interference, and avoiding the excitation element 30 from accidentally detaching from the magnetic conductor 10.

[0072] See Figure 2 , Figures 4-6 The top cover 321 has a positioning groove 3212 on the side opposite to the coil 31, and a positioning protrusion 23 is formed on the stop portion 22. When the exciter 30 is in the restricted position, the positioning protrusion 23 is embedded in the positioning groove 3212. The positioning groove 3212 and the positioning protrusion 23 improve the fixing effect on the exciter 30. Only when a person applies a large enough force and overcomes the resistance between the positioning protrusion 23 and the positioning groove 3212 can the exciter 30 rotate from the restricted position to the unlocked position.

[0073] Optionally, the positioning protrusion 23 is obtained by stamping and integrally formed with the stop part 22, and the positioning groove 3212 passes through the opposite sides of the top cover 321. The positioning groove 3212 and the clearance hole 3211 are both formed on the top cover 321 in one step by stamping.

[0074] In other embodiments, the positioning groove 3212 may also be provided on the stop portion 22, and the positioning protrusion 23 may also be provided on the side of the top cover 321 opposite to the coil 31.

[0075] In some other embodiments, one of the limiting part 110 and the clamped part is provided with a positioning groove 3212, and the other is fixed with a positioning protrusion 23. When the exciter 30 is in the limited position, the positioning protrusion 23 is embedded in the positioning groove 3212 to restrict the rotation of the exciter 30. The limiting part 110 and the clamped part form a concave-convex connection by the positioning protrusion 23 being embedded in the positioning groove 3212.

[0076] With this configuration, when the excitation element 30 is in the restricted position, the positioning protrusion 23 can restrict the degree of freedom of the excitation element 30 to rotate relative to the magnetic conductor 10 around the axis of the bracket 11, thereby confining the excitation element 30 to the restricted position, preventing the excitation element 30 from accidentally rotating from the restricted position to the unlocked position under external interference, and avoiding the excitation element 30 from accidentally detaching from the magnetic conductor 10.

[0077] In other embodiments, the positioning protrusion 23 is fixed to the outer periphery of the rod portion 21, and the positioning groove 3212 is formed on the inner wall of the clearance hole 3211; or the positioning protrusion 23 is fixed to the inner wall of the clearance hole 3211, and the positioning groove 3212 is formed on the outer periphery of the rod portion 21.

[0078] With this configuration, the anti-detachment component 20 and the clamped part are connected by the positioning protrusion 23 embedded in the positioning groove 3212, thus forming a concave-convex connection.

[0079] In some embodiments, one of the anti-detachment component 20 and the clamped part is provided with a positioning groove 3212, and the other is provided with a spring member and a locking block. When the excitation component 30 is in the restricted position, the locking block is driven by the spring member and embedded in the positioning groove 3212. With this configuration, the anti-detachment component 20 and the clamped part form a concave-convex connection by the locking block being embedded in the positioning groove 3212.

[0080] In some embodiments, one of the anti-detachment component 20 and the clamped part is provided with a positioning groove 3212, and the other is provided with a positioning plug. When the exciter 30 is in the restricted position, the positioning plug can be connected to the anti-detachment component 20 and the clamped part that is not provided with a positioning groove 3212. During this process, the positioning plug is inserted into the positioning groove 3212. With this configuration, the anti-detachment component 20 and the clamped part form a concave-convex connection through the positioning plug being inserted into the positioning groove 3212.

[0081] Specifically, elastic components and locking blocks can be used to replace... Figures 5-6 The positioning protrusion 23 shown, the elastic element connecting the stop 22 and the locking block, can also be replaced by a positioning plug. Figures 5-6 The positioning protrusion 23 shown is detachably inserted into the stop portion 22.

[0082] It is worth noting that the above-mentioned embodiments of the anti-detachment component 20 and the clamped part forming a concave-convex connection can be combined in any two pairs, and the above-mentioned embodiments for realizing the concave-convex connection can also be applied between the limiting part 110 and the clamped part.

[0083] For example, the outer periphery of the bracket 11 is provided with a limiting lug as a limiting part 110. The top cover 321 and the bottom cover 322 together form a clamping part. The second force-bearing side is the side of the bottom cover 322 that is away from the top cover 321. The bottom cover 322 is provided with a positioning groove 3212. The positioning plug is detachably inserted into the limiting lug. When the limiting lug abuts against the second force-bearing side and the excitation element 30 rotates to the limited position, the positioning plug can be inserted into the limiting lug. During this process, the positioning plug is inserted into the positioning groove 3212.

[0084] See Figures 5-6 The limiting part 110 is formed by the end of the magnetic conductor 10 that is relatively far away from the valve body 210. That is, the limiting part 110 includes the end of the bracket 11 that is relatively far away from the valve body 210 and / or the end of the magnetic conductor 12 that faces the outside of the bracket 11.

[0085] In some embodiments, the magnetic conductor 12 and the bracket 11 are movably connected. The end of the magnetic conductor 12 that is away from the valve body 210 forms a limiting part 110 and abuts against the side of the top cover 321 near the bottom cover 322. The magnetic conductor 12, the rod part 21 and the stop part 22 are fixedly connected. The clamping area is formed between the end of the magnetic conductor 12 that is away from the valve body 210 and the stop part 22. The clamped part is formed by the top cover 321, and the second force-bearing side is the side of the top cover 321 near the bottom cover 322.

[0086] With this configuration, the distance between the stop part 22 and the magnetic conductor 12 at the end furthest from the valve body 210 remains unchanged, thus the height of the clamping area remains constant, ensuring that the top cover 321 can always be effectively and firmly clamped by the magnetic conductor 12 and the stop part 22.

[0087] In other embodiments, the magnetic conductor 12 and the bracket 11 are fixedly connected, and the limiting part 110 can be formed at the end of the bracket 11 that is relatively far away from the valve body 210, or at the end of the magnetic conductor 12 that is relatively far away from the valve body 210.

[0088] In some embodiments, the top cover 321 forms a clamping portion, and the side of the top cover 321 near the bottom cover 322 is the second force-bearing side. When the exciter 30 is in the restricted position, the side of the top cover 321 relative to the bottom cover 322 abuts against the limiting portion 110, and the side of the top cover 321 opposite to the bottom cover 322 abuts against the stop portion 22. The limiting portion 110 and the stop portion 22 clamp and fix the top cover 321.

[0089] With this configuration, the top cover 321 can bear the clamping force of the limiting part 110 and the anti-detachment part 20 alone, which can prevent the top cover 321 and the bottom cover 322 from getting close to each other under the pressure of the limiting part 110 and the anti-detachment part 20, and avoid the top cover 321 and the bottom cover 322 pressing on the coil 31.

[0090] In other embodiments, a positioning step may be machined on the outer periphery of the bracket 11 and used as a limiting part 110 to form an axial gap between the positioning step and the stop part 22. The top cover 321 and the bottom cover 322 together form a clamping part. The side of the bottom cover 322 that is relatively away from the top cover 321 is the second force-bearing side, and the side of the top cover 321 that is opposite to the bottom cover 322 is the first force-bearing side. The positioning step abuts against the side of the bottom cover 322 that is relatively away from the top cover 321.

[0091] like Figures 3-4 As shown, the clearance hole 3211 and the positioning groove 3212 form a cross-shaped through groove. The cross-shaped through groove has four stop teeth 3213. The stop teeth 3213 abut against the limiting part 110. The anti-disengagement member 20 and the limiting part 110 clamp the stop teeth 3213.

[0092] In other embodiments, the top cover 321 and the bottom cover 322 together form the clamping part. The side of the bottom cover 322 that is relatively far away from the top cover 321 is the second force-bearing side, and the side of the top cover 321 that is opposite to the bottom cover 322 is the first force-bearing side. A limiting cone surface can be provided on the outer periphery of the bracket 11. The outer diameter of the limiting cone surface increases in the direction closer to the valve body 210. When the through hole 3221 opened in the bottom cover 322 abuts against the limiting cone surface, the excitation element 30 reaches the sleeve limit position. The excitation element 30 cannot continue to approach the valve body 210 along the axial direction of the magnetic conductor 10. At this time, a limiting part 110 is formed at the position on the limiting cone surface that abuts against the through hole 3221. The outer diameter of the limiting cone surface that abuts against the through hole 3221 is equal to the inner diameter of the through hole 3221.

[0093] In some embodiments, the inner wall of the bracket 11 and the outer peripheral side of the magnetic conductor 12 are slidably engaged, and the bracket 11 and the magnetic conductor 12 can slide relative to each other along the axial direction of the bracket 11. The end of the magnetic conductor 12 that is relatively far away from the valve body 210 is higher than the end of the bracket 11 that is relatively far away from the valve body 210 and forms a limiting part 110. The magnetic conductor 10 also includes an elastic member 13 that connects the bracket 11 and the magnetic conductor 12. The elastic extension and contraction direction of the elastic member 13 is consistent with the axial direction of the bracket 11. The rod 21 is fixedly connected to the magnetic conductor 12. The top cover 321 forms a clamping part and is clamped between the stop part 22 and the magnetic conductor 12.

[0094] When the valve body 210 is subjected to vibration and impact, the magnetic conductor 12 slides relative to the support 11 along the axial direction of the support 11. The elastic element 13 can absorb the vibration energy through elastic deformation, thereby providing a buffer for the magnetic conductor 12 and the excitation element 30, and preventing the vibration and impact from being transmitted to the magnetic conductor 12 and the excitation element 30.

[0095] like Figure 6 As shown, the end of the magnetic conductor 12 away from the valve body 210 protrudes from the end of the bracket 11 away from the valve body 210 and forms a limiting part 110. The side of the top cover 321 near the bottom cover 322 is the second force-bearing side. The stop part 22 abuts against the side of the top cover 321 away from the bottom cover 322. That is, the magnetic conductor 12 and the stop part 22 fix and clamp the top cover 321. The outer peripheral side of the magnetic conductor 12 and the inner wall of the bracket 11 slide together. When the elastic member 13 undergoes elastic expansion and contraction deformation, the magnetic conductor 12 moves relative to the bracket 11 along the axial direction of the bracket 11. The excitation member 30 moves relative to the bracket 11 along with the magnetic conductor 12 and the anti-detachment member 20.

[0096] The technical features of the above-described embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0097] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any appropriate changes and variations made to the above embodiments within the scope of the essential spirit of the present utility model shall fall within the scope of protection claimed by the present utility model.

Claims

1. An electromagnetic coil assembly, characterized in that, The device includes a magnetic guide (10), an anti-detachment member (20) fixed to the magnetic guide (10), and an excitation member (30) rotatably sleeved on the magnetic guide (10). The magnetic guide (10) includes a limiting part (110), and a clamping area is formed between the anti-detachment member (20) and the limiting part (110). The excitation member (30) includes a clamped part, and the stopping positions of the excitation member (30) relative to the magnetic guide (10) include a limiting position and an unlocking position. When the excitation element (30) is in the restricted position, the clamped part is located in the clamping area and is clamped by the anti-detachment element (20) and the limiting part (110). At least one of the anti-detachment element (20) and the limiting part (110) is in a concave-convex connection with the clamped part. When the excitation element (30) is in the unlocked position, the clamped part leaves the clamping area.

2. The electromagnetic coil assembly as described in claim 1, characterized in that, The excitation element (30) includes a magnetic guide frame (32), and the clamped portion is formed on the magnetic guide frame (32).

3. The electromagnetic coil assembly as described in claim 2, characterized in that, The magnetic guide frame (32) includes a bottom cover (322) and a top cover (321) forming the clamped portion. When the excitation member (30) is in the restricted position, the anti-detachment member (20) abuts against the side of the top cover (321) opposite to the bottom cover (322), and the limiting portion (110) abuts against the side of the top cover (321) near the bottom cover (322).

4. The electromagnetic coil assembly as described in claim 3, characterized in that, The magnetic conductor (10) includes a bracket (11) and a magnetic conductor (12) installed at the end of the bracket (11). The excitation component (30) is rotatably sleeved on the bracket (11). The magnetic conductor (12) abuts against one end of the top cover (321) to form the limiting part (110) and is fixedly provided with the anti-detachment component (20).

5. The electromagnetic coil assembly as described in claim 4, characterized in that, The magnetic conductor (10) further includes an elastic member (13) connecting the bracket (11) and the magnetic conductor (12), wherein the outer periphery of the magnetic conductor (12) slides in cooperation with the inner wall of the bracket (11).

6. The electromagnetic coil assembly as described in any one of claims 1 to 5, characterized in that, The excitation component (30) has a clearance hole (3211) for the anti-detachment component (20) to extend out. The anti-detachment component (20) forms a stop projection in the cross-sectional surface of the magnetic conductor (10). The clamped part forms a clamped projection in the cross-sectional surface. The cross-sectional surface intersects with the axis of the magnetic conductor (10). When the excitation element (30) is in the unlocked position, the clearance hole (3211) defines a first space in the truncated shaft surface, the stop projection is located in the first space, and the stop projection and the clamped projection do not overlap. When the excitation element (30) is in the restricted position, the clearance hole (3211) defines a second space in the truncated plane, a portion of the stop projection extends beyond the second space, and forms an overlapping area with the clamped projection.

7. The electromagnetic coil assembly as claimed in claim 6, characterized in that, The excitation element (30) also has a sleeve hole (310) through which the magnetic conductor (10) passes and communicates with the clearance hole (3211). The sleeve hole (310) defines a third space within the truncated axial surface, and the stop projection is located in the third space; and / or, The limiting part (110) forms a limiting projection in the truncated plane, and the limiting projection and the clamped projection form an overlapping area.

8. The electromagnetic coil assembly as claimed in claim 7, characterized in that, The anti-detachment component (20) includes a rod (21) and a stop (22). One end of the rod (21) is connected to the magnetic conductor (10), and the other end extends out of the clearance hole (3211) and is provided with the stop (22). The stop (22) and the limiting part (110) form the clamping area. One side of the clamped part abuts against the limiting part (110), and the other side abuts against the stop (22). When the excitation element (30) is in the restricted position, the clamped part is concave-convexly connected to at least one of the rod part (21), the stop part (22) and the limiting part (110).

9. The electromagnetic coil assembly as described in any one of claims 1 to 5, characterized in that, The anti-detachment component (20) and the clamped part are provided with a positioning groove (3212) on one side and a positioning protrusion (23) fixed on the other side. When the excitation component (30) is in the restricted position, the positioning protrusion (23) is embedded in the positioning groove (3212). and / or, The anti-detachment component (20) and the clamped part are provided with a positioning groove (3212) on one side and a spring component and a locking block on the other side. When the excitation component (30) is in the restricted position, the spring component drives the locking block to embed into the positioning groove (3212). and / or, One of the anti-detachment component (20) and the clamped part is provided with a positioning groove (3212), and the other is provided with a positioning plug. When the excitation component (30) is in the restricted position, the positioning plug is inserted into the positioning groove (3212).

10. A valve device, characterized in that, Includes a valve body (210) and an electromagnetic coil assembly as described in any one of claims 1 to 9, wherein the magnetic conductor (10) is disposed on the valve body (210).

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