Noise reduction structure for electromagnetic valve and electromagnetic valve

Abstract

The embodiment of the utility model relates to the technical field of electromagnetic valves, and discloses a noise reduction structure for an electromagnetic valve. The movable iron core and the static iron core are sequentially arranged in the cavity of the shell in a penetrating mode, a through hole is formed in the movable iron core in the axial direction, and a rubber part is formed in the through hole in a pouring mode; a first boss protruding out of the movable iron core is formed at the position, at the end of the movable iron core, of the rubber part, and under the condition that the static iron core collides with the movable iron core, the first boss makes contact with the static iron core, so that noise generated by collision is reduced. When the static iron core collides with the movable iron core, the first boss makes contact with the static iron core, impact energy generated by collision can be effectively absorbed, and noise generated by collision is reduced; in addition, the rubber part is tightly attached to the inner wall of the through hole of the movable iron core to form a sealed integrated structure, the number of parts and assembly steps are reduced through the integrated structural design, and the assembly difficulty and the error rate are reduced. The utility model further discloses the electromagnetic valve.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electromagnetic valves, in particular to a noise reduction structure for an electromagnetic valve and the electromagnetic valve. BACKGROUND

[0002] The electromagnetic valve is an industrial equipment controlled by electromagnetism, and is an automatic basic element for controlling fluid medium. The main working principle is to use the magnetization after the coil is electrified to make the moving iron core and the static iron core attract each other, so as to realize the adjustment and control of the direction, flow rate and speed of the medium. However, due to the fast speed and large impact force when the moving iron core and the static iron core attract each other, a large noise will be generated due to the impact during the attraction, causing noise pollution. CONTENT OF THE INVENTION

[0003] An object of the present application is to provide a noise reduction structure for an electromagnetic valve and the electromagnetic valve, at least to solve the above problems.

[0004] To achieve the above object, some embodiments of the present application provide a noise reduction structure for an electromagnetic valve, comprising a shell limiting a cavity; a moving iron core and a static iron core sequentially arranged in the cavity of the shell, the moving iron core is provided with a through hole in the axial direction, and a rubber part is formed in the through hole; wherein the rubber part is formed with a first boss protruding from the moving iron core at the end of the moving iron core, and the first boss is in contact with the static iron core when the static iron core and the moving iron core collide, so as to reduce the noise generated by the collision.

[0005] Some embodiments of the present application also provide an electromagnetic valve comprising the noise reduction structure for an electromagnetic valve provided by the foregoing embodiments.

[0006] Compared with the related art, in the scheme provided by the embodiments of the present application, the rubber part is formed in the through hole of the moving iron core, and the first boss is formed at the end of the moving iron core. When the static iron core and the moving iron core collide, the first boss is in contact with the static iron core, which can effectively absorb the impact energy generated by the collision and reduce the noise generated by the collision. In addition, the rubber part is tightly attached to the inner wall of the through hole of the moving iron core, forming a sealed integrated structure. The integrated structure design reduces the number of parts and the assembly steps, and reduces the assembly difficulty and the error rate. BRIEF DESCRIPTION OF DRAWINGS

[0007] One or more embodiments are exemplified by the pictures in the drawings corresponding thereto, which do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified. The drawings do not constitute a proportional limitation.

[0008] Figure 1 is a cross-sectional schematic view of the noise reduction structure for an electromagnetic valve provided by the embodiments of the present application;

[0009] Figure 2 is an explosion schematic diagram of a noise reduction structure for a solenoid valve provided by an embodiment of the present disclosure;

[0010] Figure 3 is a cross-sectional schematic diagram of a static core provided by an embodiment of the present disclosure;

[0011] Figure 4 is a structural schematic diagram of a moving core provided by an embodiment of the present disclosure;

[0012] Figure 5 is a cross-sectional schematic diagram of another structure of a moving core provided by an embodiment of the present disclosure;

[0013] Figure 6 is a cross-sectional schematic diagram of another structure of a moving core provided by an embodiment of the present disclosure;

[0014] Figure 7 is another structural schematic diagram of a moving core provided by an embodiment of the present disclosure;

[0015] Figure 8 is a cross-sectional schematic diagram of another structure of a moving core provided by an embodiment of the present disclosure.

[0016] Reference signs:

[0017] 10: shell; 20: moving core; 201: planar limiting structure; 202: protrusion; 30: rubber piece; 301: first boss; 302: second boss; 40: static core; 401: accommodating cavity; 402: protruding ring; 403: groove; 50: spring assembly; 60: sintered cotton. DETAILED DESCRIPTION

[0018] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0019] The terms "first", "second", and the like in the specification and claims of the embodiments of the present disclosure and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0020] In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the embodiments of the present disclosure and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to indicating the orientation or positional relationship, the above-mentioned terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0021] In addition, the terms "set", "connected", "fixed" should be broadly understood. For example, "connected" can be fixedly connected, detachably connected, or integrally configured; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0022] Unless otherwise specified, the term "a plurality of" means two or more.

[0023] In the embodiments of the present disclosure, the character " / " represents an "or" relationship between the objects before and after it. For example, A / B means: A or B.

[0024] The term "and / or" is a description of the association between objects, which means that there can be three relationships. For example, A and / or B means: A or B, or, A and B, the three relationships.

[0025] It should be noted that the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0026] In combination Figures 1 to 8 As shown, the noise reduction structure for the electromagnetic valve provided by the embodiments of the present disclosure comprises a shell 10 which limits a cavity; further comprising a moving iron core 20 and a static iron core 40 which are sequentially arranged in the cavity of the shell 10, the moving iron core 20 is configured with a through hole along the axial direction, and a rubber part 30 is injection molded in the through hole; wherein the rubber part 30 is configured with a first boss 301 protruding from the moving iron core 20 at the end of the moving iron core 20, and the first boss 301 is in contact with the static iron core 40 in the case of impact between the static iron core 40 and the moving iron core 20, so as to reduce the noise generated by the impact.

[0027] The noise reduction structure for the electromagnetic valve is provided by the embodiment of the present disclosure. The rubber part 30 is injection molded in the through hole of the moving iron core 20, and the first boss 301 is formed at the end of the moving iron core 20. When the static iron core 40 collides with the moving iron core 20, the first boss 301 is in contact with the static iron core 40, which can effectively absorb the impact energy generated by the collision and reduce the noise caused by the collision. In addition, the rubber part 30 is tightly attached to the inner wall of the through hole of the moving iron core 20, forming a sealed integrated structure, which effectively prevents foreign matters such as dust and moisture from entering the inside of the moving iron core 20. The integrated structure design reduces the number of parts and assembly steps, and reduces the assembly difficulty and error rate.

[0028] In the traditional electromagnetic valve, the direct collision of the moving iron core 20 and the static iron core 40 during the driving process will generate a large impact force, which will further cause high-frequency vibration and noise. In the embodiment, the rubber part 30 is injection molded in the through hole of the moving iron core 20, and the first boss 301 is formed at the end of the moving iron core 20. When the static iron core 40 collides with the moving iron core 20, the first boss 301 is in contact with the static iron core 40. The rubber part 30 has good elasticity and damping characteristics, which can effectively absorb the impact energy generated by the collision and reduce the rigid collision between the iron cores, thereby significantly reducing the noise caused by the collision. According to actual test, under the same working conditions, the acoustic performance of the electromagnetic valve during operation can be effectively improved.

[0029] When the electromagnetic valve body exhausts, the high-speed airflow passing through the channel of the valve body will generate turbulence and vortex, which will further cause airflow noise. The shell 10 of the embodiment encloses a cavity, and the moving iron core 20 and the static iron core 40 are sequentially arranged in the cavity. This structure design makes the path of the airflow more smooth when passing through, reducing the degree of turbulence of the airflow. At the same time, the setting of the rubber part 30 also plays a certain buffering and guiding role for the airflow, reducing the noise caused by the airflow impact. Overall, the noise reduction structure of the embodiment can reduce the airflow noise when the valve body exhausts, and improve the mute effect of the electromagnetic valve during the exhaust process.

[0030] The noise reduction structure forms a sealed integrated structure through the close cooperation of the moving iron core 20, the static iron core 40 and the shell 10, and the injection molding of the rubber part 30 in the through hole of the moving iron core 20. The rubber part 30 not only forms the first boss 301 at the end of the moving iron core 20 for noise reduction, but also tightly attaches to the inner wall of the moving iron core 20, avoiding abnormal sound generated by the rubber part 30 and the moving iron core 20 during operation, and effectively preventing foreign matters such as dust and moisture from entering.

[0031] Optionally, the first end of the moving iron core 20 is configured with a sink groove, so that part of the first boss 301 is embedded in the sink groove; wherein the opening area of the sink groove is larger than the area of the through hole.

[0032] The first end portion of the movable iron core 20 is configured with a recessed groove in which a part of the first boss 301 is embedded, so that the rubber member 30 is more tightly combined with the movable iron core 20, and the rubber member 30 can better play its buffering and shock-absorbing role in the recessed groove. When the static iron core 40 collides with the movable iron core 20, the first boss 301 can not only preferentially contact the static iron core 40, but also, due to the fact that a part of the first boss 301 is embedded in the recessed groove, the deformation of the rubber member 30 is more uniform and stable, and the impact energy generated by the collision can be more effectively absorbed, thereby further reducing the noise generated by the collision.

[0033] The opening area of the recessed groove is greater than the area of the through hole, so that the distribution of the rubber member 30 at the end portion of the movable iron core 20 is more uniform, and the connection strength between the rubber member 30 and the movable iron core 20 is enhanced. In the long-term operation of the electromagnetic valve, the movable iron core 20 will repeatedly move, and the rubber member 30 will also repeatedly deform. If the combination of the rubber member 30 and the movable iron core 20 is not tight enough, the rubber member 30 can be loose or even fall off. However, by providing the recessed groove at the end portion of the movable iron core 20 and making the opening area of the recessed groove greater than the area of the through hole, the embedding of the rubber member 30 in the recessed groove is more firm, which can effectively prevent the rubber member 30 from loosening or falling off during repeated deformation, thereby improving the stability and reliability of the entire noise reduction structure and prolonging the service life of the electromagnetic valve.

[0034] In addition, the design of the recessed groove at the end portion of the movable iron core 20 also brings convenience to the assembly process. When the rubber member 30 is injection molded in the through hole of the movable iron core 20, the presence of the recessed groove provides a clear boundary for the positioning and molding of the rubber member 30. Since the opening area of the recessed groove is greater than the area of the through hole, the rubber member 30 can be more uniformly filled into the recessed groove during pouring, avoiding problems such as uneven distribution or overflow of the rubber member 30 at the end portion of the movable iron core 20. This not only improves the assembly precision and ensures the good cooperation between the rubber member 30 and the movable iron core 20, but also reduces the scrap rate caused by poor molding of the rubber member 30.

[0035] Especially, in the case where the space gap is not enough, embedding the first boss part into the movable iron core can meet the use requirements.

[0036] Optionally, the bottom wall of the recessed groove is a plane perpendicular to the axial direction of the movable iron core 20 or is an inclined surface, and in the case where the bottom wall of the recessed groove is an inclined surface, the bottom wall of the recessed groove is inclined from the side wall of the through hole to the side wall of the recessed groove.

[0037] In the case of the design of the bottom wall of the sink as a plane, the thickness of the first boss 301 located in the sink is uniform, thereby ensuring stable buffering. In the case of the design of the bottom wall of the sink as an inclined plane, the bottom wall of the sink is inclined from the side wall of the through hole to the side wall of the sink, and the distribution of the rubber part 30 at the end of the moving iron core 20 gradually changes with the angle of the inclined plane, so that the first boss 301 has a larger contact area and a more uniform contact pressure distribution when contacting the static iron core 40, thereby more effectively absorbing and dispersing the impact energy and further reducing the noise generated by the impact.

[0038] Different designs of the bottom wall of the sink have an important influence on the bonding strength of the rubber part 30 and the moving iron core 20 and the stability of the entire noise reduction structure. When the bottom wall of the sink is a plane, the contact area of the rubber part 30 and the end of the moving iron core 20 is larger, and the combination is more compact, so that the rubber part 30 is not easy to loosen or fall off during the long-term operation of the electromagnetic valve. When the bottom wall is an inclined plane and is inclined from the side wall of the through hole to the side wall of the sink, the rubber part 30 will be guided by the inclined plane during the injection molding process, so that the rubber part 30 forms a structure similar to "anchoring" at the end of the moving iron core 20, further enhancing the connection strength between the rubber part 30 and the moving iron core 20. The stability of this structure not only ensures the persistence of the noise reduction effect of the electromagnetic valve during frequent driving, but also prevents the electromagnetic valve from malfunctioning due to the falling off of the rubber part 30, improves the reliability and service life of the electromagnetic valve, and ensures its stable operation under various working conditions.

[0039] When the bottom wall of the sink is a plane, the rubber part 30 can quickly and uniformly fill the sink during the injection process, forming a flat first boss 301, which is convenient for subsequent assembly and debugging. When the bottom wall of the sink is an inclined plane, the design of the inclined plane helps the rubber part 30 to flow and distribute better during the injection process, reduces the bubbles and defects of the rubber part 30 in the sink, and improves the molding quality of the rubber part 30.

[0040] Optionally, the rubber part 30 is configured with a second boss 302 protruding from the moving iron core 20 at the other end of the moving iron core 20 to reduce the sound generated during impact.

[0041] The rubber part 30 is configured with a second boss 302 at the other end of the moving iron core 20, which cooperates with the first boss 301 to effectively reduce noise generation regardless of the direction of impact of the moving iron core 20 in the axial direction. The rubber part 30 is configured with bosses at both ends of the moving iron core 20, which is tightly combined with the moving iron core 20, preventing the rubber part 30 from loosening or falling off during long-term frequent driving, ensuring the stability and reliability of the noise reduction structure, and prolonging the service life of the electromagnetic valve.

[0042] The second protrusion 302 cooperates with the first protrusion 301 to form a full-range buffer protection for the moving iron core 20, further reducing the noise caused by impact. The first protrusion 301 and the second protrusion 302 formed at the two ends of the rubber part 30 on the moving iron core 20 not only functionally play a role in noise reduction, but also structurally enhance the connection stability between the rubber part 30 and the moving iron core 20. Since the rubber part 30 is injection molded in the through hole of the moving iron core 20, the protrusion structure at the two ends makes the combination of the rubber part 30 and the moving iron core 20 more compact. In the long-term frequent driving process of the electromagnetic valve, the moving iron core 20 will continuously reciprocate, and the rubber part 30 will also repeatedly deform. This compact connection structure can effectively prevent the rubber part 30 from loosening or falling off on the moving iron core 20, ensuring the long-term effectiveness and stability of the noise reduction structure, prolonging the service life of the electromagnetic valve, and reducing the maintenance and replacement costs caused by the failure of the rubber part 30.

[0043] Optionally, the moving iron core is also configured with a sink groove at the end where the second protrusion is located, so that part of the second protrusion is embedded, so that the rubber part achieves the ideal compression protrusion noise reduction effect in a limited space height.

[0044] Optionally, the outer circumferential surface of the moving iron core 20 is configured with a planar limiting structure 201 to limit the rotation of the moving iron core 20.

[0045] The planar limiting structure 201 on the outer circumferential surface of the moving iron core 20 limits the rotation of the moving iron core 20, ensures the stable movement of the moving iron core 20 in the axial direction, avoids the impact of rotation on the sealing performance, noise reduction effect and running stability of the electromagnetic valve, and improves the reliability and stability of the electromagnetic valve. In addition, the planar limiting structure 201 on the outer circumferential surface of the moving iron core 20 not only ensures the stable movement of the moving iron core 20, but also indirectly optimizes the noise reduction effect of the electromagnetic valve. Since the movement of the moving iron core 20 is limited in the axial direction, the collision between the moving iron core 20 and the static iron core 40 is more accurate and stable, and the noise reduction components such as the rubber part 30 can better play their buffering and damping roles. In addition, the planar limiting structure 201 can also reduce the additional noise sources that may be generated due to the rotation of the moving iron core 20, such as friction noise between the moving iron core 20 and the shell 10. Through these comprehensive optimization effects, the overall noise reduction performance of the electromagnetic valve is further improved.

[0046] The planar limiting structure 201 on the outer circumferential surface of the moving iron core 20 also provides a clear positioning reference for the assembly process. When installing the moving iron core 20 into the cavity of the housing 10, the planar limiting structure 201 can tightly fit with the housing 10 or other related components, ensuring the accurate position of the moving iron core 20 in the axial direction, avoiding assembly problems caused by the installation angle deviation of the moving iron core 20. This precise positioning not only improves the assembly accuracy, but also reduces the possible errors and repeated adjustment time during the assembly process, thereby improving the assembly efficiency, reducing the production cost, and improving the overall quality and production benefit of the product.

[0047] In practical applications, the planar limiting structure 201 not only plays a role in the movement and assembly process of the moving iron core 20, but also has a positive impact on the structural stability of the entire electromagnetic valve. By limiting the rotation of the moving iron core 20, the planar limiting structure 201 enhances the connection stability between the moving iron core 20 and the housing 10, the static iron core 40, and other components, making the internal structure of the entire electromagnetic valve more compact and firm. During the long-term and frequent operation of the electromagnetic valve, this structural stability can effectively reduce wear, looseness, and other problems caused by the relative movement and vibration between components, thereby prolonging the service life of the electromagnetic valve, reducing maintenance and replacement costs, and ensuring that the electromagnetic valve can maintain good performance and noise reduction effect during long-term use.

[0048] Optionally, the outer circumferential surface of the moving iron core 20 is structured with multiple groups of long strip-shaped protrusions 202 to reduce the contact area between the moving iron core 20 and the housing 10.

[0049] The outer circumferential surface of the moving iron core 20 is structured with multiple groups of long strip-shaped protrusions 202 to reduce the contact area with the housing 10, reduce friction, make the movement of the moving iron core 20 more smooth, reduce energy loss, improve movement accuracy and electromagnetic valve response speed, and is especially suitable for scenes with high requirements for response speed and control accuracy. The long strip-shaped protrusions 202 make the contact between the moving iron core 20 and the housing 10 "point contact" or "line contact", dispersing friction heat and pressure, reducing material loss, significantly reducing wear degree, prolonging the service life of the electromagnetic valve, and reducing maintenance and replacement costs.

[0050] The friction between the moving iron core 20 and the housing 10 not only generates heat and wear, but also causes mechanical vibration and noise. By structuring the outer circumferential surface of the moving iron core 20 with multiple groups of long strip-shaped protrusions 202 to reduce the contact area between the moving iron core 20 and the housing 10, it helps to reduce friction and mechanical vibration caused by friction, thereby reducing the noise caused thereby. In addition, the multiple groups of long strip-shaped protrusions 202 can also play a role in buffering and shock absorption to a certain extent, further absorbing and dispersing the vibration energy generated by the moving iron core 20 during movement, making the electromagnetic valve run more quietly.

[0051] In addition, during the operation of the electromagnetic valve, friction between the moving iron core 20 and the shell 10 generates heat. If the heat cannot be dissipated in time, it will cause the internal temperature of the electromagnetic valve to rise, affecting its performance and service life. By providing multiple groups of long strip-shaped protrusions 202 on the outer circumferential surface of the moving iron core 20, the contact area between the moving iron core 20 and the shell 10 is reduced, making the contact between the two more concentrated in the area of the protrusions 202. This design facilitates the flow of air or other cooling medium between the moving iron core 20 and the shell 10, improving the heat dissipation efficiency. At the same time, the long strip-shaped protrusions 202 also increase the heat dissipation area of the surface of the moving iron core 20, promoting the dissipation of heat, thereby effectively reducing the internal temperature of the electromagnetic valve and ensuring the stable operation of the electromagnetic valve in high-temperature environments.

[0052] Optionally, the static iron core 40 is axially configured with a receiving cavity 401 for accommodating the spring assembly 50; wherein the static iron core 40 is configured with a protruding ring 402 at the end facing the moving iron core 20, and the protruding ring 402 is circumferentially arranged around the opening of the receiving cavity 401.

[0053] The presence of the protruding ring 402 makes the impact force of the moving iron core 20 more evenly distributed on the surface of the protruding ring 402 when it collides with the static iron core 40, reducing the high-frequency noise caused by the local impact force concentration. At the same time, the spring assembly 50 is arranged in the receiving cavity 401, which can provide good buffering and shock absorption when the moving iron core 20 collides with the static iron core 40, further absorbing collision energy and reducing noise.

[0054] In addition, the design of the receiving cavity 401 and the protruding ring 402 of the static iron core 40 not only helps to reduce noise, but also improves the structural stability and reliability of the entire electromagnetic valve. The protruding ring 402 is circumferentially arranged around the opening of the receiving cavity 401, increasing the structural strength of the end of the static iron core 40, making it less likely to deform or be damaged when subjected to the impact of the moving iron core 20 for a long time. At the same time, the spring assembly 50 is installed in the receiving cavity 401, which is better protected and avoids spring failure or damage caused by external factors. This embodiment makes the cooperation between the components of the electromagnetic valve more tight and stable during frequent driving, reducing the risk of failure caused by loose or damaged components, prolonging the service life of the electromagnetic valve, reducing maintenance and replacement costs, and ensuring the reliable operation of the electromagnetic valve under various working conditions.

[0055] Optionally, the moving iron core 20 and the static iron core 40 are coaxially arranged, and the radius of the first boss 301 is greater than or equal to the radius of the protruding ring 402.

[0056] When the moving iron core 20 is coaxially arranged with the static iron core 40, the moving iron core 20 can be more accurately centered with the static iron core 40 during movement, reducing the impact and noise caused by eccentric movement. At the same time, the radius of the first boss 301 is greater than or equal to the radius of the convex ring 402, ensuring that when the moving iron core 20 collides with the static iron core 40, the first boss 301 can completely cover the convex ring 402, so that the impact force is more evenly distributed on the entire contact surface, avoiding high-frequency noise caused by local stress concentration; it can better withstand impact force and repeated mechanical stress, reducing the possibility of fatigue damage of components. In addition, it can also form a relatively flat contact surface at the end of the moving iron core 20, further reducing noise.

[0057] In addition, coaxial arrangement makes the movement of the moving iron core 20 in the housing 10 more stable, reducing the shaking and vibration caused by eccentric movement, thereby reducing the risk of wear and loosening between components.

[0058] Optionally, the static iron core 40 is configured with a groove 403 at the end away from the moving iron core 20, the groove 403 is in communication with the accommodating cavity 401, and is used to hold the sintered cotton 60 to reduce noise.

[0059] The sintered cotton 60 has good sound absorption and sound insulation performance. The sintered cotton 60 held in the groove 403 at the end of the static iron core 40 can effectively absorb the noise generated when the airflow flows inside the electromagnetic valve, as well as the high-frequency noise generated when the moving iron core 20 collides with the static iron core 40. The groove 403 is in communication with the accommodating cavity 401, and the sintered cotton 60 is reasonably placed to ensure stable noise reduction effect and maintain compact and reasonable overall structure of the electromagnetic valve.

[0060] It should be noted that the groove 403 at the end of the static iron core 40 provides great convenience for the installation of the sintered cotton 60. During assembly, the sintered cotton 60 can be directly placed in the groove 403 without the need for additional fixing measures, simplifying the assembly steps and reducing the assembly time. At the same time, since the groove 403 is in communication with the accommodating cavity 401, the sintered cotton 60 will not interfere with the assembly of other components during installation, improving the smoothness and accuracy of assembly. The present embodiment reasonably utilizes the space at the end of the static iron core 40, and realizes the noise reduction function by holding the sintered cotton 60 in the groove 403, without the need for additional materials or complex components. In addition, as a relatively low-cost material, the sintered cotton 60 can effectively improve the noise reduction performance of the product without significantly increasing the cost. At the same time, due to the optimization of the structure and the improvement of the assembly efficiency, the material waste and cost expenditure in the overall production process are effectively controlled, the utilization rate of materials is improved, and the manufacturing cost of the product is reduced.

[0061] In combination Figures 1 to 8As shown, the embodiment of the present disclosure further provides an electromagnetic valve comprising the noise reduction structure for the electromagnetic valve provided by the above-mentioned embodiment. The noise reduction structure for the electromagnetic valve comprises a shell 10 which bounds a cavity; further comprises a moving iron core 20 and a static iron core 40 which are sequentially arranged in the cavity of the shell 10, the moving iron core 20 is configured with a through hole along the axial direction, and a rubber piece 30 is injection molded in the through hole; wherein the rubber piece 30 is configured with a first boss 301 protruding from the moving iron core 20 at the end of the moving iron core 20, and the first boss 301 is in contact with the static iron core 40 in the case of impact between the static iron core 40 and the moving iron core 20, so as to reduce the noise generated by the impact.

[0062] By using the electromagnetic valve provided by the embodiment of the present disclosure, the rubber piece 30 is injection molded in the through hole of the moving iron core 20, and the first boss 301 is formed at the end of the moving iron core 20, and the first boss 301 is in contact with the static iron core 40 in the case of impact between the static iron core 40 and the moving iron core 20, so as to effectively absorb the impact energy generated by the impact and reduce the noise generated by the impact; in addition, the rubber piece 30 is tightly attached to the inner wall of the through hole of the moving iron core 20 to form a sealed integrated structure, thereby reducing the number of components and assembly steps, and reducing the assembly difficulty and error rate.

[0063] The above description and drawings sufficiently show the embodiments of the present disclosure to enable one skilled in the art to practice them. Other embodiments can include structural and other changes. The embodiments are merely representative of the possible variations. Individual components and functions are optional unless explicitly required, and the order of operations can be changed. Parts and features of some embodiments can be included or replace parts and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims, and the above-described embodiments should be regarded as exemplary and non-limiting.

Claims

1. A noise reduction structure for a solenoid valve, comprising a housing enclosing a cavity; characterized in that, It also includes a moving iron core and a stationary iron core that are sequentially inserted into the cavity of the shell. The moving iron core has a through hole along the axial direction, and a rubber part is injected and molded in the through hole. The rubber component has a first boss protruding from the moving iron core at the end of the moving iron core. When the stationary iron core and the moving iron core collide, the first boss contacts the stationary iron core to reduce the noise generated by the impact.

2. The noise reduction structure according to claim 1, characterized in that, The first end of the moving iron core is constructed with a groove so that a portion of the first boss is embedded in the groove. In this case, the opening area of ​​the settling tank is larger than the area of ​​the through hole.

3. The noise reduction structure according to claim 1, characterized in that, The bottom wall of the settling tank is either a plane perpendicular to the axis of the moving iron core or an inclined plane. When the bottom wall of the settling tank is an inclined plane, the bottom wall of the settling tank slopes from the side wall of the through hole to the side wall of the settling tank.

4. The noise reduction structure according to claim 1, characterized in that, The rubber component has a second protrusion protruding from the moving iron core at the other end to reduce the noise generated during impact.

5. The noise reduction structure according to claim 1, characterized in that, The outer circumferential surface of the moving iron core has a planar limiting structure to limit the rotation of the moving iron core.

6. The noise reduction structure according to claim 1, characterized in that, The outer circumferential surface of the moving iron core has multiple sets of elongated protrusions to reduce the contact area between the moving iron core and the shell.

7. The noise reduction structure according to claim 1, characterized in that, The stationary iron core has an axially oriented cavity for housing the spring assembly; The stationary iron core has a protruding ring at the end facing the moving iron core, and the protruding ring is arranged circumferentially around the opening of the receiving cavity.

8. The noise reduction structure according to claim 7, characterized in that, The moving iron core and the stationary iron core are coaxially arranged, and the radius of the first boss is greater than or equal to the radius of the convex ring.

9. The noise reduction structure according to any one of claims 1 to 8, characterized in that, The stationary iron core has a groove at the end opposite to the moving iron core. The groove is connected to the receiving cavity and is used to hold sintered cotton to reduce noise.

10. A solenoid valve, characterized in that, Includes a noise reduction structure for a solenoid valve as described in any one of claims 1 to 9.

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