Solenoid valve, carbon can and automobile

Abstract

This utility model discloses an electromagnetic valve, a carbon canister, and an automobile, relating to the field of electromagnetic valve technology. The electromagnetic valve includes a coil frame, a valve core, and a magnetically conductive assembly. When the winding is energized, the magnetically conductive core generates a magnetic attraction force, thereby driving the valve core to move against the elastic force of the elastic element. When the winding is de-energized, the magnetically conductive core loses its magnetic attraction force, and the valve core resets under the elastic force of the elastic element. Since the limiting post is inserted inside the valve core, it is made of a non-magnetic material. The magnetically conductive core, made of a magnetically conductive material, is spaced axially from the valve core, allowing the valve core to experience axial magnetic attraction and ensuring smooth valve core movement. To reduce the space occupied by the valve core, it is designed as a cylindrical shape, allowing the limiting post to be inserted inside. The contact between the limiting post and the valve core determines the valve core's position when the valve is open, while simultaneously reducing the axial space occupied by the valve core in the cylindrical shape, which is beneficial for the miniaturization design of the electromagnetic valve.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic valve technology, and in particular to an electromagnetic valve, a carbon canister, and an automobile. Background Technology

[0002] Solenoid valves can be used on carbon canisters, whose main function is to adsorb gasoline vapors and prevent them from being directly released into the atmosphere and causing pollution. The solenoid valve is a control valve used to regulate whether gasoline vapors in the carbon canister enter the engine for combustion. When the engine is running, the solenoid valve opens, allowing the adsorbed gasoline vapors to be introduced into the engine for combustion. In related technologies, the valve core of a solenoid valve is usually designed as a long strip to ensure the stability of its movement. However, this long strip shape occupies a large amount of space, increasing the overall length of the solenoid valve and hindering its miniaturization. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a solenoid valve that facilitates miniaturization design.

[0004] This utility model also proposes a carbon canister and an automobile having the above-mentioned solenoid valve.

[0005] According to a first aspect of the present invention, an electromagnetic valve includes: a wire frame, including a cylindrical column and two end plates, the two end plates being respectively connected to both ends of the cylindrical column, the cylindrical column being wound with a winding, the winding being located between the two end plates; The valve core is slidably disposed inside the cylindrical column. The valve core is elongated and extends along the axial direction of the cylindrical column. The valve core is cylindrical. A magnetically conductive assembly includes a magnetically conductive core and a limiting post made of a non-magnetically conductive material. At least a portion of the structure of the magnetically conductive core is located within the cylindrical column. An elastic element is provided between the magnetically conductive core and the valve core. The limiting post is connected to one end of the magnetically conductive core facing the valve core and is inserted into the valve core. The valve core is configured to move under the magnetic attraction force generated by the magnetically conductive core and is capable of abutting and limiting itself against the limiting post. The valve core and the magnetic core are spaced apart along the axial direction of the cylinder.

[0006] The solenoid valve according to the embodiment of this utility model has at least the following beneficial effects: When the winding is energized, the magnetic core generates a magnetic attraction force, which drives the valve core to move against the elastic force of the elastic element. When the winding is de-energized, the magnetic core loses its magnetic attraction force, and the valve core returns to its original position under the elastic force of the elastic element. Because the valve core is elongated, it ensures that it moves along a predetermined trajectory, reducing the risk of swaying or tilting. Since the limiting post is inserted inside the valve core, it is made of a non-magnetic material, while the magnetic core, made of a magnetic material, is spaced axially from the valve core, allowing the valve core to experience axial magnetic attraction and ensuring smooth movement. To reduce the space occupied by the valve core, it is designed as a cylindrical shape, allowing the limiting post to be inserted inside. The contact between the limiting post and the valve core determines the valve core's position when the valve is open, while also reducing the axial space occupied by the valve core in the cylindrical section, which is beneficial for the miniaturization of the solenoid valve design.

[0007] According to some embodiments of the present invention, the solenoid valve further includes a valve plate located at one end of the wire frame away from the magnetic core. The valve plate is provided with an air passage hole. The valve core includes a sealing element connected to one end of the valve core away from the magnetic core. The sealing element is configured to seal with the air passage hole.

[0008] According to some embodiments of this utility model, a portion of the sealing element protrudes from the end face of the valve core, while another portion of the sealing element is located inside the valve core. When the valve core opens the vent hole, the sealing element can abut against the limiting post.

[0009] According to some embodiments of the present invention, the sealing member has a groove on the side facing the vent hole, and on the projection plane perpendicular to the axial direction of the vent hole, the outer contour line of the groove is located inside the inner contour line of the vent hole.

[0010] According to some embodiments of this utility model, the inner cavity of the cylindrical column has a mating section, the valve core is located in the mating section, and on a projection plane perpendicular to the axial direction of the cylindrical column, the outer contour of the mating section is polygonal, and the outer contour of the valve core is circular; or... The inner cavity of the cylinder has a mating section, and the valve core is located in the mating section. On the projection plane perpendicular to the axial direction of the cylinder, the outer contour of the mating section is circular, and the outer contour of the valve core is polygonal.

[0011] According to some embodiments of the present invention, the solenoid valve further includes a bracket, the bracket and the wire frame are fixedly connected, and one end of the magnetic core passes through the cylindrical column and is fixedly connected to the bracket.

[0012] According to some embodiments of the present invention, the bottom wall of the bracket is provided with a mounting hole, and the outer wall of one end of the magnetic core is provided with an annular groove, which is connected to the wall of the mounting hole.

[0013] According to some embodiments of the present invention, the wire frame further includes a plug connected to the end plate closest to the valve core, and the plug extends in a direction away from the other end plate.

[0014] The carbon canister according to a second aspect of the present invention includes the solenoid valve described in the above embodiment.

[0015] The carbon canister according to the embodiments of this utility model has at least the following beneficial effects: By employing the solenoid valve of the first aspect embodiment, when the winding of the solenoid valve is energized, the magnetic core generates a magnetic attraction force, thereby driving the valve core to move against the elastic force of the elastic element. When the winding is de-energized, the magnetic core loses its magnetic attraction force, and the valve core resets under the elastic force of the elastic element. Because the valve core is elongated, it ensures that the valve core moves along a predetermined trajectory, reducing the risk of valve core swaying or tilting. Since the limiting post is inserted inside the valve core, it is made of a non-magnetic material, while the magnetic core, made of a magnetic material, is axially spaced from the valve core, allowing the valve core to be subjected to axial magnetic attraction force, ensuring smooth valve core movement. To reduce the space occupied by the valve core, the valve core is designed as a cylinder, allowing the limiting post to be inserted inside. The contact between the limiting post and the valve core determines the position of the valve core when it opens, while reducing the space occupied by the valve core in the cylinder axially, which is beneficial for the miniaturization design of the solenoid valve.

[0016] The automobile according to a third aspect of the present invention includes the carbon canister described in the above embodiments.

[0017] The automobile according to the embodiments of the present utility model has at least the following beneficial effects: By employing the carbon canister of the second embodiment, when the winding of the solenoid valve in the carbon canister is energized, the magnetic core generates a magnetic attraction force, thereby driving the valve core to move against the elastic force of the elastic element. When the winding is de-energized, the magnetic core loses its magnetic attraction force, and the valve core resets under the elastic force of the elastic element. Because the valve core is elongated, it ensures that the valve core moves along a predetermined trajectory, reducing the risk of valve core swaying or tilting. Since the limiting post is inserted inside the valve core, it is made of a non-magnetic material, while the magnetic core, made of a magnetic material, is spaced axially from the valve core, allowing the valve core to be subjected to axial magnetic attraction force, ensuring smooth valve core movement. To reduce the space occupied by the valve core, the valve core is designed as a cylinder, allowing the limiting post to be inserted inside. The contact between the limiting post and the valve core determines the position of the valve core when it opens, while reducing the space occupied by the valve core in the cylinder axially, which is beneficial for the miniaturization design of the solenoid valve.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of an electromagnetic valve according to an embodiment of the present invention; Figure 2 This is a cross-sectional view of a solenoid valve according to an embodiment of the present invention; Figure 3 This is an exploded view of an embodiment of the solenoid valve of this utility model; Figure 4 This is a schematic diagram of the structure of a wire frame according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the shell structure according to one embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the solenoid valve after the cover is hidden, according to one embodiment of this utility model; Figure 7 This is a schematic diagram of the structure of the solenoid valve after the housing is hidden, according to one embodiment of this utility model; Figure 8 yes Figure 2 Enlarged view of point A in the middle.

[0020] Figure label: Solenoid valve 1000; Housing 100; mounting cavity 110; mounting groove 111; air inlet pipe 120; top cover 130; exhaust pipe 131; exhaust port 132; annular part 133; sealing ring 134; mounting base 140; slot 141; mounting pad 150; snap fastener 151; plug-in base 160; Valve plate 200; mounting part 210; buffer 220; connecting hole 230; sealing ring 240; vent hole 250; positioning hole 260; Wire frame 300; cylindrical column 310; mating section 311; end plate 320; plug 330; positioning post 340; winding 350; Bracket 400; Enclosure 410; Connector 420; Connecting post 421; Mounting hole 430; Magnetic guide assembly 500; magnetic guide core 510; annular groove 511; limiting shaft 520; Valve core 600; seal 610; groove 611; elastic element 620. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0024] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0025] In related technologies, the valve core of a solenoid valve is usually designed as a long strip to ensure the stability of the valve core movement. However, the long strip valve core occupies a large space, which increases the overall length of the solenoid valve and is not conducive to the miniaturization of the solenoid valve.

[0026] To solve the above problems, refer to Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, an embodiment of the solenoid valve 1000 of this utility model includes a wire frame 300, a valve core 600, and a magnetically conductive assembly 500. The wire frame 300 includes a cylindrical column 310 and two end plates 320, which are respectively connected to the two ends of the cylindrical column 310. A winding 350 is wound around the cylindrical column 310 and is located between the two end plates 320. The valve core 600 is slidably disposed within the cylindrical column 310. The valve core 600 is elongated and extends along the axial direction of the cylindrical column 310, and is cylindrical in shape. The magnetically conductive assembly 500 includes a magnetically conductive core 510 made of magnetically conductive material and a limiting post made of non-magnetically conductive material. At least a portion of the structure of the magnetically conductive core 510 is located within the cylindrical column 310. An elastic element 620, which may be a spring, is provided between the magnetically conductive core 510 and the valve core 600. A limiting post is connected to the end of the magnetic core 510 facing the valve core 600, and the limiting post is inserted into the valve core 600. The valve core 600 is configured to move under the magnetic attraction force generated by the magnetic core 510, and the valve core 600 can abut against the limiting post for limitation. The valve core 600 and the magnetic core 510 are spaced apart along the axial direction of the cylinder 310.

[0027] The magnetic core 510 is a metal component with magnetic permeability, which can be made of a soft magnetic alloy material. It is used to form a closed magnetic circuit and drive the valve core 600 to move. The limiting shaft 520 is a columnar part used to constrain the displacement of the valve core 600. It can be connected to the magnetic core 510 by an interference fit. By limiting the axial displacement of the magnetic core 510, it prevents excessive collision between the valve core 600 and the magnetic component 500. The limiting shaft 520 is made of stainless steel and is not magnetic itself. Since the limiting shaft 520 is not magnetic, and the magnetic core 510 and the valve core 600 are spaced apart along the axial direction of the magnetic core 510, when the magnetic core 510 generates magnetism, the valve core 600 can only move along the axial direction without being attracted by the limiting shaft 520.

[0028] Using the above scheme, when the winding 350 is energized, the magnetic core 510 generates a magnetic attraction force, thereby driving the valve core 600 to move against the elastic force of the elastic element 620. When the winding 350 is de-energized, the magnetic core 510 loses its magnetic attraction force, and the valve core 600 returns to its original position under the elastic force of the elastic element 620. Because the valve core 600 is elongated, it can be ensured that the valve core 600 moves along a predetermined trajectory, reducing the risk of swaying or tilting. Since the limiting post is inserted inside the valve core 600, it is made of a non-magnetic material. The magnetic core 510, made of a magnetic material, and the valve core 600 are spaced apart axially, allowing the valve core 600 to be subjected to an axial magnetic attraction force, ensuring smooth movement of the valve core 600. To reduce the space occupied by the valve core 600, the valve core 600 is designed as a cylindrical shape, so that the limiting post can be inserted inside the valve core 600. The position of the valve core 600 when the valve is opened can be determined by the contact between the limiting post and the valve core 600. At the same time, the space occupied by the valve core 600 in the axial direction of the cylindrical post 310 is reduced, which is conducive to the miniaturization design of the solenoid valve 1000.

[0029] To solve the above problems, refer to Figure 1 , Figure 2 and Figure 3 As shown in the embodiment of this utility model, the solenoid valve 1000 further includes a housing 100 and a valve plate 200. The housing 100 has an internal mounting cavity 110. One end of the housing 100 is provided with an air inlet pipe 120, and the other end is provided with a top cover 130. The top cover 130 is provided with an exhaust pipe 131. The inner cavity of the air inlet pipe 120 communicates with the mounting cavity 110. The end of the exhaust pipe 131 facing the mounting cavity 110 has an exhaust port 132. For example, the air inlet pipe 120 is located at the lower end of the housing 100, and the top cover 130 is located at the upper end of the housing 100. The valve plate 200 is located within the mounting cavity 110. The valve plate 200 has a mounting portion 210, which is connected to a buffer member 220. The buffer member 220 is connected to the housing 100. A sealing ring 134 is provided between the valve plate 200 and the top cover 130, surrounding the exhaust port 132. The valve plate 200 has an air passage 250 communicating with the exhaust port 132. The wire frame 300 is installed within the mounting cavity 110 and located on the side of the valve plate 200 opposite to the upper cover 130. A sealing element 610 made of elastic material is provided at one end of the valve core 600 facing the valve plate 200; part of the sealing element 610 is located on the outside of the valve core 600, and the other part is located on the inside of the valve core 600. The solenoid valve 1000 has a closed state and a venting state. When the solenoid valve 1000 is in the closed state, the sealing element 610 seals the vent hole 250 under the elastic force of the elastic element 620. When the solenoid valve 1000 is in the venting state, the sealing element 610 opens the vent hole 250 and can abut against the magnetic conductive assembly 500.

[0030] The buffer component 220 refers to the flexible connecting part between the valve plate 200 and the housing 100. It can be implemented using a silicone sleeve and is fixed between the valve plate 200 mounting part 210 and the housing 100 mounting groove 111 by an interference fit, effectively absorbing the impact energy generated by the movement of the valve core 600. The elastic seal 610 refers to the elastic structure at the end of the valve core 600. It can be made of silicone or rubber material. Its outer part covers the edge of the valve core 600 end face, and its inner part extends into the internal cavity of the valve core 600. When compressed, both the inner and outer parts deform simultaneously to enhance the sealing effect. The mating structure between the magnetic guide assembly 500 and the elastic component 620 refers to the spring loading mechanism set in the electromagnetic drive unit. It can be a helical spring sleeved on the end of the magnetic guide core 510, and the opening and closing stroke of the valve core 600 is controlled by the preload.

[0031] For example, the buffer 220 installed in the mounting cavity 110 forms a flexible support structure. When the valve core 600 is closed, the deformation of the elastic sealing element 610 seals the vent 250. When the electromagnetic coil is energized, the magnetic conductive component 500 generates a magnetic attraction force, causing the valve core 600 to move against the elastic force of the elastic element 620. At this time, the outer part of the sealing element 610 disengages from the edge of the vent 250, ensuring that the vent 250 is open. When the solenoid valve 1000 is de-energized, the magnetic conductive component 500 loses its magnetic attraction force, and the valve core 600 resets under the elastic force of the elastic element 620. When the valve core 600 impacts the valve plate 200 under the elastic force of the elastic element 620, the buffer 220 on the valve plate 200 absorbs the remaining kinetic energy, preventing the valve plate 200 from rigidly colliding with the housing 100.

[0032] With the above solution, since a buffer 220 is connected to the mounting portion 210 of the valve plate 200 and the buffer 220 is connected to the housing 100, most of the vibration generated by the valve plate 200 when the valve core 600 impacts the valve plate 200 is absorbed by the buffer 220, thereby effectively reducing the occurrence of vibration transmission to the housing 100. Simultaneously, when the magnetic guide assembly 500 attracts the valve core 600 to move, to avoid noise caused by the valve core 600 impacting the magnetic guide assembly 500, the sealing member 610 on the valve core 600 is configured such that part of it is located on the outside of the valve core 600 and the other part is located on the inside of the valve core 600. Therefore, the inner part of the sealing member 610 can abut against the magnetic guide assembly 500, replacing the impact of the valve core 600. Since the sealing member 610 is made of elastic material, it can effectively reduce the noise generated when in contact with the magnetic guide assembly 500, thereby improving the user experience.

[0033] Reference Figure 8As shown in the embodiment of this utility model, the sealing element 610 has a groove 611 on the side facing the vent 250. On the projection plane perpendicular to the axial direction of the vent 250, the outer contour line of the groove 611 is located inside the inner contour line of the vent 250. It is understood that, because the sealing element 610 is prone to bulging outwards during the manufacturing process, when the sealing element 610 opens the vent 250, the distance between the bulge and the vent 250 is too close, easily leading to poor airflow. Therefore, a groove 611 is provided on the end face of the sealing element 610, so that even if a bulge forms, it will not protrude from the end face of the sealing element 610, thereby improving the smoothness of airflow when the sealing element 610 opens the vent 250.

[0034] Reference Figure 4 As shown in the embodiment of this utility model, the inner cavity of the cylinder 310 has a mating section 311, and the valve core 600 is located in the mating section 311. On the projection plane perpendicular to the axial direction of the cylinder 310, the outer contour line of the mating section 311 is a polygon, and the outer contour line of the valve core 600 is a circle; or, the inner cavity of the cylinder 310 has a mating section 311, and the valve core 600 is located in the mating section 311. On the projection plane perpendicular to the axial direction of the cylinder 310, the outer contour line of the mating section 311 is a circle, and the outer contour line of the valve core 600 is a polygon.

[0035] Among them, the mating section 311 refers to the area within the inner cavity of the cylinder 310 that forms a kinematic fit with the valve core 600. This area can be machined into a regular geometric shape to constrain the movement trajectory of the valve core 600 along its axial direction. A polygonal outer contour refers to a cross-sectional shape with three or more sides, which can be achieved using a quadrilateral or hexagonal structure, providing guidance through corner contact. A circular outer contour refers to a cross-sectional shape composed of closed circular arcs, which can be machined into a cylindrical surface structure to reduce kinematic friction through surface contact.

[0036] For example, when the mating section 311 has a polygonal cross-section and the valve core 600 has a circular cross-section, the edges of the polygonal inner wall form line contact with the circular valve core 600, reducing the contact area while ensuring axial guiding accuracy. When the mating section 311 has a circular cross-section and the valve core 600 has a polygonal cross-section, the edges of the valve core 600 also form line contact with the circular inner wall, reducing the contact area, effectively limiting movement while improving smoothness of movement.

[0037] By employing a geometric mismatch design of polygons and circles, surface contact is transformed into point or line contact while maintaining necessary guiding functions. This effectively reduces motion resistance and significantly decreases frictional vibration with the inner wall of the cylinder 310, preventing wear of the seal 610 due to frequent impacts. Simultaneously, the minute gaps created by the geometric mismatch absorb machining errors, ensuring that the valve core 600 maintains a stable trajectory under high temperature or vibration conditions, thereby extending the service life of the solenoid valve 1000.

[0038] Reference Figure 2 and Figure 3 As shown in the embodiment of this utility model, the valve core 600 is cylindrical, and one end of the elastic element 620 abuts against the inner wall of the valve core 600. The cylindrical shape of the valve core 600 means that the valve core 600 is a hollow cylindrical structure, which can be achieved by stamping metal tubing, forming an axially continuous hollow cavity inside. This structure reduces motion inertia while maintaining the overall strength of the valve core 600, which is beneficial for improving the action response speed. One end of the elastic element 620 abutting against the inner wall of the valve core 600 means that the end of the elastic element 620 forms contact support with the top wall of the internal cavity of the valve core 600, so that the elastic force of the elastic element 620 is evenly distributed radially along the valve core 600, preventing the valve core 600 from tilting during movement.

[0039] For example, in the closed state, the elastic force of the elastic element 620 is transmitted to the sealing element 610 through the inner wall of the valve core 600, forcing the sealing element 610 to press against the vent hole 250 to achieve a seal. When the electromagnetic coil is energized and generates magnetic force, the magnetic conductive assembly 500 drives the valve core 600 to move axially along the cylinder 310. At this time, the elastic element 620 is deformed by pressure, and its inner wall support keeps the valve core 600 in a linear motion trajectory.

[0040] Through the above technical solution, this application effectively reduces the lateral vibration generated during the movement of the valve core 600, and avoids local wear of the seal 610 due to uneven force. At the same time, the hollow structure of the cylindrical valve core 600 reduces the mass of the moving parts and reduces the impact force of the opening and closing action on the magnetic conductive assembly 500, thereby reducing operating noise and extending service life.

[0041] Reference Figure 8As shown in the embodiment of this utility model, a sealing ring 240 is provided on the side of the valve plate 200 facing the sealing element 610. The sealing ring 240 surrounds the vent hole 250. When the solenoid valve 1000 is in the closed state, the sealing element 610 and the sealing ring 240 are sealed together. When the surface of the valve plate 200 directly mates with the sealing element 610, due to manufacturing issues, the surface of the valve plate 200 may have poor flatness, resulting in poor sealing performance when the sealing element 610 and the valve plate 200 are mated. Therefore, by setting the sealing ring 240 to mate with the sealing element 610, the sealing element 610 can effectively wrap the sealing ring 240. At the same time, the end face of the sealing ring 240 can be further precision machined, effectively improving the sealing performance when mated.

[0042] Reference Figure 2 As shown in the embodiment of this utility model, the solenoid valve 1000 further includes a bracket 400, which is connected to the wire frame 300. One end of the magnetic core 510 passes through the cylindrical column 310 and is connected to the bracket 400. The bottom wall of the bracket 400 is provided with a mounting hole 430, and the outer wall of one end of the magnetic core 510 is provided with an annular groove 511, which is connected to the wall of the mounting hole 430. The magnetic core 510 and the bracket 400 can be connected by riveting.

[0043] The bracket 400 is a support structure used to support the wire frame 300. It can be made of metal stamping or injection molding. Its function is to provide a mounting base for the magnetic component 500 and to transmit mechanical stress. The magnetic core 510 is fixed to the bracket 400 by riveting, so that the magnetic component 500 and the bracket 400 form a rigid connection. The limiting shaft 520 and the magnetic core 510 are assembled with an interference fit. When the valve core 600 moves to the magnetic component 500 driven by the elastic element 620, the contact surface between the limiting shaft 520 and the magnetic core 510 forms a mechanical limit. When the solenoid valve 1000 is in the closed state, the sealing element 610 of the valve core 600 presses against the vent hole 250 of the valve plate 200 under the action of the elastic element 620. At this time, the magnetic core 510 and the limiting shaft 520 maintain a preset distance. When the solenoid coil is energized and generates magnetic force, the magnetic core 510 drives the limiting shaft 520 to move towards the valve core 600 until the limiting shaft 520 contacts the sealing element 610 of the valve core 600. At this time, the vent hole 250 is fully opened.

[0044] This solution utilizes a split magnetic core 510 and a limiting shaft 520 design, along with a riveting fixing process, to improve the connection stability of the magnetic component 500. Simultaneously, the interference fit structure of the limiting shaft 520 effectively absorbs the impact energy generated by the movement of the valve core 600. This solution also reduces collision noise when the valve core 600 contacts the magnetic component 500, reduces the risk of seal failure due to loose parts, and extends the service life of the magnetic component 500.

[0045] Reference Figure 2 and Figure 3 As shown in the embodiment of this utility model, the wire frame 300 further includes a plug 330, which is connected to the end plate 320 closest to the valve core 600, and extends in a direction away from the other end plate 320. The bottom wall of the housing 100 is provided with a socket 160, through which the plug 330 passes. Power can be supplied to the winding 350 through an external power source connected to the plug 330.

[0046] Reference Figure 2 , Figure 5 and Figure 6 As shown in the embodiment of this utility model, the inner wall of the mounting cavity 110 forms at least two spaced mounting grooves 111. The mounting portion 210 has at least two mounting grooves, the number of which is the same as the number of mounting grooves 111. The buffer member 220 is sleeved on the mounting portion 210 and is interference-fitted with the mounting groove 111. The upper cover 130 includes an annular portion 133, which abuts against the buffer member 220 to prevent the buffer member 220 from disengaging from the mounting groove 111.

[0047] The mounting groove 111 refers to a recessed structure on the inner wall of the mounting cavity 110, which can be formed by stamping or integral injection molding, and is used to accommodate the buffer 220 and limit its displacement. The mounting portion 210 refers to a protruding structure on the valve plate 200, which can be formed by injection molding or stamping, and is used to fix the position of the buffer 220. The buffer 220 is a sleeve made of elastic material, such as rubber or silicone, which is inserted into the mounting groove 111 through an interference fit to absorb the impact force generated by the movement of the valve plate 200. An interference fit means that the outer diameter of the buffer 220 is slightly larger than the inner diameter of the mounting groove 111; for example, the outer diameter of the buffer 220 can be 0.1 to 0.3 mm larger than the inner diameter of the mounting groove 111, achieving a tight fixation through elastic deformation. The annular portion 133 refers to an annular structure extending inward from the edge of the upper cover 130, which is formed, for example, by integral injection molding, and is used to apply axial pressure to the buffer 220 to prevent it from falling out of the mounting groove 111.

[0048] For example, the valve plate 200 is connected to the buffer member 220 via the mounting part 210, and the buffer member 220 is pressed into the mounting groove 111 of the mounting cavity 110 of the housing 100. The number of mounting grooves 111 corresponds to the number of mounting parts 210. For example, the mounting grooves 111 can be set as two symmetrically distributed grooves 611, and the mounting parts 210 are correspondingly set as two cylindrical protrusions. After the buffer member 220 is fitted onto the mounting part 210, it is fixed in the mounting groove 111 by an interference fit, forming a stable radial constraint. After assembly, the annular part 133 of the upper cover 130 contacts the end face of the buffer member 220, and restricts the axial movement of the buffer member 220 along the mounting groove 111 by applying axial pressure. When the valve plate 200 vibrates due to the opening and closing of the solenoid valve 1000, the buffer member 220 absorbs the impact energy through elastic deformation. At the same time, the dual constraint of the interference fit and the annular part 133 ensures that the buffer member 220 will not loosen or fall off during long-term use.

[0049] This design, by setting multiple mounting slots 111 and mounting portions 210, combined with interference fits and annular portions 133 for limiting, constrains the buffer component 220 both radially and axially, significantly improving the stability of the buffer structure, effectively reducing the impact force of the valve plate 200 movement on the housing 100, and reducing vibration and noise during the operation of the solenoid valve 1000. The interference fit between the buffer component 220 and the mounting slots 111 ensures assembly accuracy and avoids abnormal noise caused by gaps. The symmetrical layout of the multiple mounting slots 111 ensures uniform stress on the valve plate 200, preventing structural fatigue caused by single-point stress concentration. The axial contact between the annular portion 133 and the buffer component 220 further prevents the buffer component 220 from falling off, improving the reliability of the solenoid valve 1000 under bumpy conditions in a vehicle.

[0050] Reference Figure 3 and Figure 7 As shown in the embodiment of this utility model, the valve plate 200 is provided with a connecting hole 230, and the bracket 400 and the wire frame 300 are connected. The bracket 400 includes a surrounding plate 410 extending toward the valve plate 200. A connector 420 is provided at one end of the surrounding plate 410 near the valve plate 200, and the connector 420 passes through the connecting hole 230. The connecting hole 230 refers to a through hole structure provided on the valve plate 200, which can be a long strip or an elliptical hole, used to accommodate the connector 420 to achieve the positioning connection between the bracket 400 and the valve plate 200. The surrounding plate 410 refers to a plate-like structure extending from the bracket 400 toward the valve plate 200, which can be manufactured by stamping, used to support the connector 420 and maintain its relative positional relationship with the valve plate 200. The connector 420 refers to a columnar structure provided at the end of the surrounding plate 410, which can be made of metal.

[0051] The valve plate 200 is connected via connector 420, fixing the relative position between the bracket 400 and the valve plate 200 and preventing component displacement due to vibration. Simultaneously, the extended enclosure 410 provides support for the valve plate 200, reducing lateral swaying during valve core 600 operation. This solves the problem of sealing failure caused by vibration-induced displacement of internal components in the solenoid valve 1000. The mating structure between the enclosure 410 and the connecting hole 230 improves the positioning accuracy of the valve plate 200 and bracket 400, ensuring the alignment of the sealing ring 134 and the exhaust port 132, thereby enhancing sealing reliability.

[0052] Reference Figure 3 , Figure 4 and Figure 7 As shown in the embodiment of this utility model, the upper end of the wire frame 300 is provided with a plurality of positioning posts 340, and the valve plate 200 is provided with a plurality of positioning holes 260 at the corresponding positions. The positioning posts 340 and the positioning holes 260 are positioned and engaged in a corresponding manner, thereby limiting the radial position of the valve plate 200 and facilitating the connection of the valve plate 200 with the bracket 400 through the connector 420, which can improve the installation efficiency.

[0053] Reference Figure 6 and Figure 7 As shown in the embodiment of this utility model, the connector 420 of the solenoid valve 1000 includes two spaced-apart connecting posts 421. The connecting posts 421 are inclined in a direction away from the other connecting post 421 to prevent them from disengaging from the connecting hole 230. The connecting post 421 is a columnar structure used to fix the bracket 400 and the valve plate 200. It can be made of metal and forms a snap-fit ​​structure 151 through its inclined arrangement. The spaced-apart arrangement means that the two connecting posts 421 maintain a certain distance, which can be achieved by symmetrical distribution to increase the uniformity of force distribution. The inclined direction means that the ends of the connecting posts 421 bend in opposite directions, which can be achieved through a stamping process, utilizing deformation to generate reverse tension.

[0054] For example, two symmetrically distributed connecting posts 421 are provided at the end of the enclosure plate 410 of the bracket 400. During assembly, after the connecting posts 421 are inserted into the connecting holes 230 of the valve plate 200, external force is applied to bend the connecting posts 421 in opposite directions. This creates multi-point contact between the connecting posts 421 and the inner wall of the connecting holes 230, generating frictional resistance and deformation rebound force, thereby preventing the connecting posts 421 from dislodging from the holes. For example, the tilt angle of the connecting posts 421 can be controlled between 15° and 45° to ensure sufficient fixing strength while avoiding excessive material deformation.

[0055] This solution uses a reverse tilt design of double connecting columns 421 to form a self-locking structure, which effectively disperses vibration stress, reduces the risk of connection failure, prevents the bracket 400 and valve plate 200 from displacing and separating during long-term vibration, ensures the fitting accuracy of the magnetic conductive component 500 and valve core 600, reduces abnormal noise caused by loose parts, and improves assembly efficiency and structural reliability.

[0056] Reference Figure 1 and Figure 3 As shown in the embodiment of this utility model, the outer wall of the housing 100 is provided with a mounting base 140, and a mounting pad 150 is inserted into the mounting base 140. The mounting base 140 is provided with a slot 141, and the mounting pad 150 is provided with a buckle 151. The buckle 151 and the slot 141 engage, thereby limiting the relative position of the mounting pad 150 and the mounting base 140. The mounting pad 150 is constructed as a vibration damping pad, and the vibration damping pad is provided with an insertion interface, which facilitates the insertion of the engine's connector into the interface, thereby achieving the function of vibration reduction and noise reduction.

[0057] One embodiment of the carbon canister of this utility model includes the solenoid valve 1000 of the above embodiment. In this embodiment, the solenoid valve 1000 is used. When the winding 350 of the solenoid valve 1000 is energized, the magnetic core 510 generates a magnetic attraction force, thereby driving the valve core 600 to move against the elastic force of the elastic element 620. When the winding 350 is de-energized, the magnetic core 510 loses its magnetic attraction force, and the valve core 600 returns to its original position under the elastic force of the elastic element 620. Because the valve core 600 is elongated, it can be ensured that the valve core 600 moves along a predetermined trajectory, reducing the risk of swaying or tilting. Since the limiting post is inserted inside the valve core 600, it is made of a non-magnetic material. The magnetic core 510, made of a magnetic material, and the valve core 600 are spaced apart axially, allowing the valve core 600 to be subjected to an axial magnetic attraction force, ensuring smooth movement of the valve core 600. To reduce the space occupied by the valve core 600, the valve core 600 is designed as a cylindrical shape, so that the limiting post can be inserted inside the valve core 600. The position of the valve core 600 when the valve is opened can be determined by the contact between the limiting post and the valve core 600. At the same time, the space occupied by the valve core 600 in the axial direction of the cylindrical post 310 is reduced, which is conducive to the miniaturization design of the solenoid valve 1000.

[0058] Since the carbon canister adopts all the technical solutions of the solenoid valve 1000 in the above embodiments, it has at least all the beneficial effects brought about by the technical solutions in the above embodiments, which will not be repeated here.

[0059] An embodiment of the present invention includes a carbon canister as described in the above embodiments. In this embodiment, the automobile uses the carbon canister described in the above embodiments. When the winding 350 of the solenoid valve 1000 is energized, the magnetic core 510 generates a magnetic attraction force, thereby driving the valve core 600 to move against the elastic force of the elastic member 620. When the winding 350 is de-energized, the magnetic core 510 loses its magnetic attraction force, and the valve core 600 resets under the elastic force of the elastic member 620. Because the valve core 600 is elongated, it can be ensured that the valve core 600 moves along a predetermined trajectory, reducing the risk of the valve core 600 swaying or tilting. Since the limiting post is inserted inside the valve core 600, the limiting post is made of a non-magnetic material, while the magnetic core 510, made of a magnetic material, and the valve core 600 are spaced apart axially, so that the valve core 600 can be subjected to an axial magnetic attraction force, ensuring the smooth movement of the valve core 600. To reduce the space occupied by the valve core 600, the valve core 600 is designed as a cylindrical shape, so that the limiting post can be inserted inside the valve core 600. The position of the valve core 600 when the valve is opened can be determined by the contact between the limiting post and the valve core 600. At the same time, the space occupied by the valve core 600 in the axial direction of the cylindrical post 310 is reduced, which is conducive to the miniaturization design of the solenoid valve 1000.

[0060] Since the automobile adopts all the technical solutions of the carbon canister in the above embodiments, it has at least all the beneficial effects brought about by the technical solutions in the above embodiments, which will not be repeated here.

[0061] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. Solenoid valve, characterized in that include: A wire frame includes a cylindrical column and two end plates, the two end plates being respectively connected to both ends of the cylindrical column, the cylindrical column being wound with a winding located between the two end plates; The valve core is slidably disposed inside the cylindrical column. The valve core is elongated and extends along the axial direction of the cylindrical column. The valve core is cylindrical. A magnetically conductive assembly includes a magnetically conductive core and a limiting post made of a non-magnetically conductive material. At least a portion of the structure of the magnetically conductive core is located within the cylindrical column. An elastic element is provided between the magnetically conductive core and the valve core. The limiting post is connected to one end of the magnetically conductive core facing the valve core and is inserted into the valve core. The valve core is configured to move under the magnetic attraction force generated by the magnetically conductive core and is capable of abutting and limiting itself against the limiting post. The valve core and the magnetic core are spaced apart along the axial direction of the cylinder.

2. The solenoid valve according to claim 1, characterized in that: The solenoid valve further includes a valve plate located at the end of the wire frame opposite to the magnetic core. The valve plate has an air vent. The valve core includes a seal connected to the end of the valve core opposite to the magnetic core. The seal is configured to seal with the air vent.

3. The solenoid valve according to claim 2, characterized in that: Part of the seal protrudes from the end face of the valve core, while another part of the seal is located inside the valve core. When the valve core opens the vent hole, the seal can abut against the limiting post.

4. The solenoid valve according to claim 2, characterized in that: The sealing element has a groove on the side facing the vent hole, and on the projection plane perpendicular to the axial direction of the vent hole, the outer contour line of the groove is located inside the inner contour line of the vent hole.

5. The solenoid valve according to claim 1, characterized in that: The inner cavity of the cylindrical column has a mating section, and the valve core is located in the mating section. On a projection plane perpendicular to the axial direction of the cylindrical column, the outer contour of the mating section is polygonal, and the outer contour of the valve core is circular; or... The inner cavity of the cylinder has a mating section, and the valve core is located in the mating section. On the projection plane perpendicular to the axial direction of the cylinder, the outer contour of the mating section is circular, and the outer contour of the valve core is polygonal.

6. The solenoid valve according to claim 1, characterized in that: The solenoid valve also includes a bracket, which is fixedly connected to the wire frame, and one end of the magnetic core passes through the cylindrical column and is fixedly connected to the bracket.

7. The electromagnetic valve according to claim 6, characterized by: The bottom wall of the bracket is provided with a mounting hole, and the outer wall of one end of the magnetic core is provided with an annular groove, which is connected to the wall of the mounting hole.

8. The solenoid valve according to claim 1, characterized in that, The wire frame also includes a plug connected to the end plate closest to the valve core, and the plug extends in a direction away from the other end plate.

9. A carbon can characterized by: Including the solenoid valve as described in any one of claims 1 to 8.

10. An automobile, characterized in that: Includes the carbon canister as described in claim 9.

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