Electromagnetic driving mechanism and high-voltage direct-current relay

Abstract

The utility model relates to an electromagnetic driving mechanism and a high-voltage direct-current relay. The electromagnetic driving mechanism comprises a coil, a static magnetic conductive piece and a movable magnetic conductive piece. The static magnetic conductive piece is provided with a first magnetic pole face. The movable magnetic conducting piece is provided with a second magnetic pole face opposite to the first magnetic pole face, and the coil is fixed relative to the static magnetic conducting piece and arranged around the movable magnetic conducting piece in the circumferential direction; the movable magnetic conductive piece can move relative to the coil so as to be close to or far away from the static magnetic conductive piece; the vertical distance between part of the surfaces of the first magnetic pole face and the second magnetic pole face is larger than the vertical distance between the rest surfaces of the first magnetic pole face and the second magnetic pole face. According to the electromagnetic driving mechanism, the magnetic density when the first magnetic pole face and the second magnetic pole face attract each other is improved, and therefore the magnetic retention force when the static magnetic conduction piece and the movable magnetic conduction piece attract each other is improved.

Description

Technical Field

[0001] The present application relates to the field of relay technology, and in particular to an electromagnetic drive mechanism and a high-voltage DC relay. Background Art

[0002] A relay is an electronic control device with a control system (also known as an input circuit) and a controlled system (also known as an output circuit). Relays are commonly used in automatic control circuits, providing functions such as automatic regulation, safety protection, and circuit switching. High-voltage DC relays are a common type of relay. The electromagnetic drive mechanism, also known as the magnetic circuit portion when used in a high-voltage DC relay, is used to drive the contacts of the high-voltage DC relay to switch. The electromagnetic drive mechanism's moving and stationary iron cores are attracted by magnetic force, driving the contacts of the high-voltage DC relay into contact.

[0003] As the use of high-voltage DC relays continues to expand, the industry's requirements for the electromagnetic attraction between the moving and stationary cores are becoming increasingly stringent. Improving the electromagnetic attraction between the moving and stationary cores can reduce the voltage when they are closed, thereby reducing the power consumption of the coils. However, traditional electromagnetic drive mechanisms lack sufficient retention force between the moving and stationary cores after they are closed, making them difficult to meet these requirements. Utility Model Content

[0004] Based on this, it is necessary to provide an electromagnetic drive mechanism and a high-voltage DC relay to address the problem of insufficient holding force of the dynamic and static iron cores after being attracted.

[0005] An electromagnetic drive mechanism, comprising:

[0006] A static magnetic conductive member having a first magnetic pole surface;

[0007] a dynamic magnetic conductive member having a second magnetic pole surface opposite to the first magnetic pole surface;

[0008] The coil is fixed relative to the static magnetic conductive member and is arranged circumferentially around the dynamic magnetic conductive member;

[0009] The dynamic magnetic conductive member can move relative to the coil to approach or move away from the static magnetic conductive member;

[0010] A perpendicular distance between a portion of the first magnetic pole surface and the second magnetic pole surface is greater than a perpendicular distance between the remaining surfaces.

[0011] In the aforementioned electromagnetic drive mechanism, because the vertical distance between a portion of the first and second magnetic pole faces is greater than the vertical distance between the remaining surfaces, when the first and second magnetic pole faces are attracted to each other, the portion with the larger vertical distance between the first and second magnetic pole faces does not directly contact each other. Consequently, when the static and dynamic magnetic components are attracted to each other, the contact area between the first and second magnetic pole faces is reduced, which helps to increase the magnetic density when the first and second magnetic pole faces are attracted to each other, thereby enhancing the magnetic holding force when the static and dynamic magnetic components are attracted to each other.

[0012] In one embodiment, at least one of the first magnetic pole surface and the second magnetic pole surface is provided with a groove.

[0013] In one embodiment, the first magnetic pole surface has a central portion and a peripheral portion surrounding the central portion, and the second magnetic pole surface has a central portion and a peripheral portion surrounding the central portion, and the distance between the central portion of the first magnetic pole surface and the central portion of the second magnetic pole surface is greater than the distance between the peripheral portion of the first magnetic pole surface and the peripheral portion of the second magnetic pole surface. This allows for reasonable planning of the contact position between the dynamic and static magnetic permeable components during attraction, improving both the holding force and the uniformity of the attraction force, thereby enhancing the performance stability and structural reliability of the electromagnetic drive mechanism.

[0014] In one embodiment, a groove is provided on at least one of the first magnetic pole surface and the second magnetic pole surface, the bottom wall of the groove forms the middle portion, and the peripheral portion is arranged around the groove.

[0015] In one embodiment, the first magnetic pole surface is a flat surface, and the second magnetic pole surface is provided with a groove; or

[0016] The first magnetic pole surface is provided with a groove, and the second magnetic pole surface is a flat surface; or,

[0017] The first magnetic pole surface and the second magnetic pole surface are both provided with grooves, and the grooves on the first magnetic pole surface and the grooves on the second magnetic pole surface are opposite to each other.

[0018] In one embodiment, the first magnetic pole surface of the static magnetic member is provided with a first receiving groove, and the second magnetic pole surface of the dynamic magnetic member is provided with a second receiving groove opposite the first receiving groove. The electromagnetic drive mechanism further includes an elastic element, the ends of which are respectively provided in the first receiving groove and the second receiving groove, and the elastic element is capable of being compressed when the dynamic magnetic member and the static magnetic member approach each other. In this way, the layout of the groove and hole structure can be rationally planned, improving space utilization efficiency and reducing the impact of the groove and slot structure on the structural strength and electromagnetic attraction of the dynamic and static magnetic members.

[0019] In one embodiment, when the first magnetic pole surface is provided with the groove, the first accommodating groove is opened in the middle of the first magnetic pole surface and is connected to the groove; when the second magnetic pole surface is provided with the groove, the second accommodating groove is opened in the middle of the second magnetic pole surface and is connected to the groove.

[0020] In one embodiment, the dynamic magnetic member includes a dynamic core body and an expansion portion connected to the dynamic core body, the expansion portion surrounds one end of the dynamic core body facing the static magnetic member and surrounds the dynamic core body, the surfaces of the dynamic core body and the expansion portion facing the static magnetic member together constitute the second magnetic pole surface, and the projection of the first magnetic pole surface on the second magnetic pole surface roughly coincides with the second magnetic pole surface. By increasing the relative area of ​​the first magnetic pole surface and the second magnetic pole surface, the electromagnetic attraction between the dynamic magnetic member and the static magnetic member can be enhanced. In combination with the design in which the vertical distance between some surfaces of the first magnetic pole surface and the second magnetic pole surface is greater than the vertical distance between the remaining surfaces, it is also beneficial to take into account the improvement of the holding force after attraction.

[0021] In one embodiment, a groove is provided on a side of the moving core body facing the static magnetic member; or

[0022] The surface of the amplification portion facing the static magnetic component is protruded toward the side where the static magnetic component is located relative to the surface of the moving core body facing the static magnetic component. The inner circumferential surface of the amplification portion and the surface of the moving core body facing the static magnetic component form a groove.

[0023] In one embodiment, the electromagnetic drive mechanism further includes a magnetic conductive connecting member and a magnetic circuit constraining member, the dynamic magnetic conductive member is located between the magnetic conductive connecting member and the magnetic circuit constraining member, and the static magnetic conductive member is provided on a side of the magnetic conductive connecting member facing the dynamic magnetic conductive member;

[0024] Alternatively, the electromagnetic drive mechanism further includes a magnetic circuit constraint member, the static magnetic permeable member is connected to the magnetic circuit constraint member, and the dynamic magnetic permeable member is located between the static magnetic permeable member and the magnetic circuit constraint member.

[0025] A high-voltage DC relay comprises a contact portion and an electromagnetic drive mechanism as described in any of the above embodiments, wherein the static magnetic conductive part and the dynamic magnetic conductive part of the electromagnetic drive mechanism move closer to or farther from each other to drive the contact portion to close or open. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the structure of the electromagnetic drive mechanism in some embodiments.

[0027] Figure 2 for Figure 1 Schematic diagram of the explosion of the electromagnetic drive mechanism shown.

[0028] Figure 3 for Figure 1 The schematic cross-sectional view of the electromagnetic drive mechanism shown is along the AA direction.

[0029] Figure 4 for Figure 3 A partial enlarged schematic diagram of the dotted box area of ​​the electromagnetic drive mechanism is shown.

[0030] Figure 5 Schematic diagram of the structure of the static magnetic conductive part and the dynamic magnetic conductive part in some embodiments.

[0031] Figure 6 This is a partially enlarged schematic diagram of the electromagnetic drive mechanism when both the first magnetic pole surface and the second magnetic pole surface are provided with grooves in some embodiments.

[0032] Figure 7 This is a partially enlarged schematic diagram of the electromagnetic drive mechanism when the second magnetic pole surface is provided with a groove in some embodiments.

[0033] Reference numerals:

[0034] 10. Electromagnetic drive mechanism; 11. Static magnetic conductive member; 111. First magnetic pole surface; 112. First receiving groove; 12. Dynamic magnetic conductive member; 121. Second magnetic pole surface; 122. Moving core body; 123. Amplification portion; 124. Second receiving groove; 125. Groove; 126. Middle portion; 127. Peripheral portion; 13. Elastic element; 14. Sealing tube; 15. Magnetic conductive connector; 16. Magnetic circuit constraint member; 17. Magnetic conductive tube. DETAILED DESCRIPTION

[0035] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0036] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0037] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0038] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0039] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0041] To enhance the electromagnetic attraction between the moving and stationary cores and reduce coil power consumption, the electromagnetic drive mechanism in traditional high-voltage DC relays typically requires increasing the area of ​​the opposing magnetic pole faces of the moving and stationary cores. However, this increased pole face area can easily lead to a decrease in magnetic density when the moving and stationary cores engage, reducing the holding force after the moving and stationary cores are attracted, making it difficult to meet operational requirements.

[0042] To solve the above problems, the present application provides an electromagnetic drive mechanism and a high-voltage DC relay.

[0043] See Figure 1 、 Figure 2 and Figure 3 , Figure 1 and Figure 2 They are respectively a structural schematic diagram and an explosion schematic diagram of the electromagnetic drive mechanism 10 in some embodiments of the present application, Figure 3 for Figure 1 The electromagnetic drive mechanism 10 shown is a schematic cross-sectional view along the AA direction. The electromagnetic drive mechanism 10 provided in the present application includes but is not limited to being used in any applicable electronic components such as high-voltage DC relays and solenoid valves that convert electromagnetic energy into mechanical energy. In the present application, the electromagnetic drive mechanism 10 is used in a high-voltage DC relay as an example. The electromagnetic drive mechanism 10 includes a static magnetic member 11 and a dynamic magnetic member 12. The static magnetic member 11 has a first magnetic pole face 111, and the dynamic magnetic member 12 has a second magnetic pole face 121 opposite to the first magnetic pole face 111. The static magnetic member 11 and the dynamic magnetic member 12 can approach or move away from each other. When the dynamic magnetic member 12 approaches the static magnetic member 11 under the action of electromagnetic attraction until the dynamic magnetic member 12 and the static magnetic member 11 contact each other, the first magnetic pole face 111 and the second magnetic pole face 121 contact each other, and maintain a state of mutual attraction under the action of the electromagnetic holding force.

[0044] The high-voltage DC relay involved in the present application may include a contact part (not shown in the figure) for realizing a switching function. The contact part can be transmission-connected to the dynamic magnetic member 12. The mutual approach of the dynamic magnetic member 12 and the static magnetic member 11 can drive the contact part to contact and close. The mutual distance between the dynamic magnetic member 12 and the static magnetic member 11 can drive the contact part to separate and open, thereby realizing the switching action of the contact part to realize the conduction or disconnection of the electrical circuit.

[0045] In some embodiments, the electromagnetic drive mechanism 10 further includes a skeleton (not shown), a coil (not shown), an elastic element 13, and a sealing tube 14. The coil is wound around the skeleton, and a through hole is provided in the skeleton. The dynamic magnetic member 12 is slidably provided in the through hole of the skeleton, and the static magnetic member 11 is fixedly provided at one end of the through hole and opposite to the dynamic magnetic member 12. The elastic element 13 includes but is not limited to a spring, etc., and the two ends of the elastic element 13 respectively abut against the dynamic magnetic member 12 and the static magnetic member 11. It can be understood that when current is applied to the coil, the static magnetic member 11 and the dynamic magnetic member 12 are magnetized and generate electromagnetic attraction to each other, which can drive the dynamic magnetic member 12 to move toward the static magnetic member 11 until the first magnetic pole face 111 and the second magnetic pole face 121 come into contact. When the dynamic magnetic member 12 and the static magnetic member 11 approach each other, the elastic element 13 is squeezed, causing the elastic element 13 to be compressed. When the holding force between the dynamic magnetic member 12 and the static magnetic member 11 is too small or disappears, the elastic restoring force of the elastic element 13 provides a reset force for the dynamic magnetic member 12, driving the dynamic magnetic member 12 to move away from the static magnetic member 11. The sealing cylinder 14 is provided on the dynamic magnetic member 12 to protect the dynamic magnetic member 12 and limit the sliding stroke of the dynamic magnetic member 12 relative to the static magnetic member 11. In some embodiments, the sealing cylinder 14 can form a sealed space that encloses the dynamic magnetic member 12 and the static magnetic member 11, and can provide a sealing effect for the dynamic magnetic member 12 and the static magnetic member 11.

[0046] In some embodiments, the electromagnetic drive mechanism 10 further includes a magnetic connector 15, a magnetic circuit constraint 16, and a magnetic cylinder 17. The magnetic connector 15 includes but is not limited to a yoke plate, and the magnetic circuit constraint 16 includes but is not limited to a U-shaped yoke. The magnetic connector 15 is connected to both ends of the magnetic circuit constraint 16 and forms a square frame shape together with the magnetic circuit constraint 16. The magnetic connector 15 and the magnetic circuit constraint 16 are jointly enclosed around the skeleton and the coil. The static magnetic member 11 is fixedly mounted on the magnetic connector 15. The dynamic magnetic member 12 can slide in the space enclosed by the magnetic connector 15 and the magnetic circuit constraint 16. The magnetic connector 15 and the magnetic circuit constraint 16 can jointly enclose the magnetic lines of force generated by the coil, thereby enhancing the electromagnetic attraction between the dynamic magnetic member 12 and the static magnetic member 11 when the coil is energized. The magnetic tube 17 is located between the frame and the dynamic magnetic member 12. For example, the magnetic tube 17 surrounds the outer periphery of the dynamic magnetic member 12, and the dynamic magnetic member 12 is slidably disposed within the magnetic tube 17. The frame is sleeved around the outer periphery of the magnetic tube 17. The magnetic tube 17 can enhance the magnetic field generated by the coil and guide the direction of the magnetic field. It also helps to reduce the magnetic resistance in the magnetic circuit, thereby improving the efficiency of magnetic field utilization and enhancing the electromagnetic attraction between the dynamic magnetic member 12 and the static magnetic member 11.

[0047] It should be noted that the above-mentioned components and their relationships are only examples for the convenience of understanding the functions of the electromagnetic drive mechanism 10 of the present application. The component composition and structural layout of the electromagnetic drive mechanism 10 are not limited to the above-mentioned records. As long as the static magnetic conductive part 11 and the dynamic magnetic conductive part 12 can approach each other under the action of electromagnetic attraction to achieve contact closure of the contact parts, it can be sufficient.

[0048] Further, combined with Figure 3 and Figure 4 As shown, in some embodiments, the vertical distance between a portion of the first magnetic pole face 111 and the second magnetic pole face 121 is greater than the vertical distance between the remaining surfaces. In other words, the distance between a portion of the first magnetic pole face 111 and the portion of the second magnetic pole face 121 opposite the portion is greater than the distance between the remaining surface of the first magnetic pole face 111 and the remaining surface of the second magnetic pole face 121 opposite the remaining surface. With this configuration, when the dynamic magnetic member 12 moves toward the static magnetic member 11 under the action of electromagnetic attraction until the first magnetic pole face 111 and the second magnetic pole face 121 contact each other, because the vertical distance between the portion of the first magnetic pole face 111 and the second magnetic pole face 121 is less than the vertical distance between the remaining portions, the portions with relatively close vertical distances will contact each other first, thereby preventing the portions with relatively large vertical distances from contacting each other. That is, when the dynamic magnetic member 12 and the static magnetic member 11 are attracted to each other, the first magnetic pole surface 111 is only partially in contact with a portion of the second magnetic pole surface 121 , and the first magnetic pole surface 111 and the second magnetic pole surface 121 exist in two separated portions.

[0049] In the electromagnetic drive mechanism 10, because the vertical distance between a portion of the first magnetic pole face 111 and the second magnetic pole face 121 is greater than the vertical distance between the remaining surfaces, when the first magnetic pole face 111 and the second magnetic pole face 121 are attracted to each other, the portion with the larger vertical distance between the first magnetic pole face 111 and the second magnetic pole face 121 does not directly contact each other. As a result, when the static magnetic member 11 and the dynamic magnetic member 12 are attracted to each other, the contact area between the first magnetic pole face 111 and the second magnetic pole face 121 is reduced, which helps to increase the magnetic density when the first magnetic pole face 111 and the second magnetic pole face 121 are attracted to each other, thereby increasing the magnetic holding force when the static magnetic member 11 and the dynamic magnetic member 12 are attracted to each other. In addition, when the electromagnetic drive mechanism 10 increases the area of ​​the first magnetic pole surface 111 and the second magnetic pole surface 121 to enhance the electromagnetic attraction when the static magnetic component 11 and the dynamic magnetic component 12 are not attracted, so as to reduce the attraction voltage of the static magnetic component 11 and the dynamic magnetic component 12 and reduce the power consumption of the coil, the above-mentioned electromagnetic drive mechanism 10 can reduce the contact area of ​​the first magnetic pole surface 111 and the second magnetic pole surface 121 when they are attracted to each other. While increasing the electromagnetic attraction, it will not affect the holding force when the static magnetic component 11 and the dynamic magnetic component 12 are attracted to each other, and can avoid the situation where the increase in the area of ​​the first magnetic pole surface 111 and the second magnetic pole surface 121 leads to a decrease in the holding force after attraction.

[0050] It should be noted that in the embodiment shown in the drawings of the present application, the static magnetic member 11 is a static iron core and is provided on the side of the magnetic connecting member 15 facing the dynamic magnetic member 12. The magnetic connecting member 15 may be a yoke iron plate, and the dynamic magnetic member 12 is located between the magnetic connecting member 15 and the magnetic path constraint 16. In other embodiments not shown in the drawings of the present application, the electromagnetic drive mechanism 10 may omit the static iron core. In this case, the static magnetic member 11 may be in the form of a yoke iron plate, the static magnetic member 11 is connected to the magnetic path constraint 16, the dynamic magnetic member 12 is located between the static magnetic member 11 and the magnetic path constraint 16, and the first magnetic pole face 111 is formed by the side of the yoke iron plate forming the static magnetic member 11 facing the dynamic magnetic member 12.

[0051] Please see again Figure 4In some embodiments, the dynamic magnetic member 12 includes a dynamic core body 122 and an expansion portion 123 connected to the dynamic core body 122. The expansion portion 123 surrounds one end of the dynamic core body 122 facing the static magnetic member 11 and is circumferentially arranged around the dynamic core body 122. The surfaces of the dynamic core body 122 and the expansion portion 123 facing the static magnetic member 11 together constitute a second magnetic pole surface 121. The projection of the first magnetic pole surface 111 on the second magnetic pole surface 121 substantially coincides with the second magnetic pole surface 121. In this embodiment, the expansion portion 123 is added to the dynamic core body 122 to increase the area of ​​the second magnetic pole surface 121. At the same time, the radial dimension of the static magnetic member 11 is increased to accommodate the increase in the area of ​​the first magnetic pole surface 111 and the second magnetic pole surface 121. By increasing the relative area between the first magnetic pole face 111 and the second magnetic pole face 121, the electromagnetic attraction between the dynamic magnetic member 12 and the static magnetic member 11 can be enhanced. Furthermore, by designing the vertical distance between some surfaces of the first magnetic pole face 111 and the second magnetic pole face 121 to be greater than the vertical distance between the remaining surfaces, this also helps to improve the holding force after attraction. In some embodiments, the dynamic core body 122 can be a cylindrical iron core structure with equal radial dimensions, the expansion portion 123 can be an iron ring structure, and the static magnetic member 11 can be a pancake-shaped iron core structure.

[0052] refer to Figure 3 and Figure 4 As shown, in some embodiments, the radial dimension of the amplification portion 123 gradually increases in the direction from the moving core body 122 to the static magnetic member 11. Thus, while increasing the area of ​​the second magnetic pole face 121 to increase the electromagnetic attraction, it is also beneficial to reduce the consumables and weight of the moving magnetic member 12. Correspondingly, the inner circumferential surface of the portion of the sealing cylinder 14 corresponding to the extreme position of the amplification portion 123 away from the static magnetic member 11 can also be set to an inclined surface inclined to the axial direction. In some embodiments, the inner diameter of the portion of the sealing cylinder 14 corresponding to the amplification portion 123 and the static magnetic member 11 can be larger than the inner diameter of the portion corresponding to the moving core body 122, so as to adapt to the radial dimension difference between the amplification portion 123, the static magnetic member 11 and the moving core body 122, and enhance the support and limiting effect on the moving magnetic member 12, thereby enhancing the performance stability and structural reliability of the electromagnetic drive mechanism 10.

[0053] In some embodiments, at least one of the first magnetic pole surface 111 and the second magnetic pole surface 121 is provided with a groove 125. For example, when the first magnetic pole surface 111 is provided with the groove 125, the bottom wall of the groove 125 and the remaining surface of the static magnetic member 11 facing the dynamic magnetic member 12 together constitute the first magnetic pole surface 111. When the second magnetic pole surface 121 is provided with the groove 125, the bottom wall of the groove 125 and the remaining surface of the dynamic magnetic member 12 facing the static magnetic member 11 together constitute the second magnetic pole surface 121. When the dynamic magnetic member 12 and the static magnetic member 11 are attracted to each other, the first magnetic pole surface 111 and the second magnetic pole surface 121 outside the groove 125 contact each other, and the bottom wall of the groove 125 does not form a contact surface for attraction, thereby improving the holding force after attraction. In addition, the process for providing the groove 125 is simple, which can simplify the preparation process of the dynamic magnetic member 12 and the static magnetic member 11 and reduce the preparation cost.

[0054] In some embodiments, first pole face 111 has a central portion 126 and a peripheral portion 127 disposed around central portion 126, and second pole face 121 has a central portion 126 and a peripheral portion 127 disposed around central portion 126. The distance between central portion 126 of first pole face 111 and central portion 126 of second pole face 121 is greater than the distance between peripheral portion 127 of first pole face 111 and peripheral portion 127 of second pole face 121. For example, in some embodiments, at least one of first pole face 111 and second pole face 121 is provided with a groove 125, wherein the bottom wall of groove 125 forms central portion 126, and peripheral portion 127 is disposed around groove 125. By increasing the distance between the middle portion 126 of the first magnetic pole surface 111 and the middle portion 126 of the second magnetic pole surface 121, when the dynamic magnetic component 12 and the static magnetic component 11 are attracted to each other, the peripheral portion 127 of the dynamic magnetic component 12 is in contact with the peripheral portion 127 of the static magnetic component 11, and the middle portion 126 of the dynamic magnetic component 12 and the middle portion 126 of the static magnetic component 11 are spaced apart. This can reasonably plan the contact position of the dynamic magnetic component 12 and the static magnetic component 11 when attracted, thereby improving the uniformity of the attraction force while improving the holding force, which is beneficial to improving the performance stability and structural reliability of the electromagnetic drive mechanism 10.

[0055] The following are three embodiments of the embodiment in which the middle portion 126 of the dynamic magnetic conductive member 12 and the static magnetic conductive member 11 are spaced apart when attracted, and the present application is not limited to the embodiment in order. Figure 3 and Figure 4 As shown, in some embodiments, a groove 125 is provided on the first magnetic pole surface 111, and the second magnetic pole surface 121 is a flat surface. The groove 125 is provided in the middle of the first magnetic pole surface 111, and the bottom wall of the groove 125 forms the middle portion 126 of the first magnetic pole surface 111. Figure 5 and Figure 6As shown, in other embodiments, a groove 125 is provided on each of the first magnetic pole surface 111 and the second magnetic pole surface 121. The grooves 125 are respectively provided at the middle position of the first magnetic pole surface 111 and the middle position of the second magnetic pole surface 121. The grooves 125 on the first magnetic pole surface 111 and the second magnetic pole surface 121 are opposite to each other, and the bottom walls of the two grooves 125 form the middle portion 126 of the first magnetic pole surface 111 and the second magnetic pole surface 121, respectively. Figure 7 As shown, in some other embodiments, the first magnetic pole surface 111 is a flat surface, and a groove 125 is provided on the second magnetic pole surface 121. The groove 125 is provided in the middle position of the second magnetic pole surface 121, and the bottom wall of the groove 125 forms the middle part 126 of the second magnetic pole surface 121. The part of the first magnetic pole surface 111 opposite to the groove 125 forms the middle part 126 of the first magnetic pole surface 111.

[0056] Please see again Figure 2 and Figure 4 In some embodiments, a first receiving groove 112 is defined on the first magnetic pole surface 111 of the static magnetic member 11, and a second receiving groove 124 is defined on the second magnetic pole surface 121 of the dynamic magnetic member 12, opposite to the first receiving groove 112. The first receiving groove 112 extends in a direction perpendicular to the line connecting the first and second magnetic pole surfaces 111, 121. The ends of the elastic element 13 are respectively disposed in the first receiving groove 112 and the second receiving groove 124, and abut against the bottom walls of the first and second receiving grooves 112, 124, respectively, so that the elastic element 13 can be compressed when the dynamic magnetic member 12 and the static magnetic member 11 approach each other. The first receiving groove 112 and the second receiving groove 124 can be respectively disposed in the middle of the first and second magnetic pole surfaces 111, 121, to reduce the impact of the first and second receiving grooves 112, 124 on the structural strength and electromagnetic attraction of the dynamic magnetic member 12 and the static magnetic member 11.

[0057] Further, refer to Figure 4 and Figure 6 As shown, in some embodiments, when the first magnetic pole surface 111 is provided with a groove 125, the first receiving groove 112 is opened in the middle portion 126 of the first magnetic pole surface 111 and communicates with the groove 125. The first receiving groove 112 can be opened in the middle position of the middle portion 126 of the first magnetic pole surface 111. Figure 6 and Figure 7 As shown, in some embodiments, when the second magnetic pole face 121 is provided with a groove 125, the second accommodating groove 124 is provided in the middle portion 126 of the second magnetic pole face 121 and is in communication with the groove 125. The second accommodating groove 124 can be provided in the middle of the middle portion 126 of the second magnetic pole face 121. Thus, the layout of the groove 125 and the hole structure can be rationally planned, improving space utilization efficiency and reducing the impact of the groove 125 and the slot structure on the structural strength and electromagnetic attraction of the dynamic magnetic conductive member 12 and the static magnetic conductive member 11.

[0058] The process for setting the groove 125 is not limited. Figure 4 and Figure 6 As shown, when the static magnetic member 11 is provided with a groove 125, the portion of the static magnetic member 11 corresponding to the groove 125 and the portion outside the groove 125 can be an integrated structure, referring to Figure 6 and Figure 7 As shown, when the dynamic magnetic member 12 is provided with a groove 125, the portion of the dynamic magnetic member 12 corresponding to the groove 125 and the portion outside the groove 125 can be an integral structure. In this embodiment, the groove 125 can be formed by integral molding through mold design. Alternatively, the groove 125 can be formed on the dynamic magnetic member 12 and / or the static magnetic member 11 by any suitable processing technique, such as stamping, milling, wire cutting, or laser cutting.

[0059] refer to Figure 6 and Figure 7 As shown, in other embodiments, when the dynamic magnetic component 12 is provided with an expansion portion 123 and a groove 125 is provided on the dynamic magnetic component 12, the surface of the expansion portion 123 facing the static magnetic component 11 protrudes toward the side where the static magnetic component 11 is located relative to the surface of the dynamic core body 122 facing the static magnetic component 11, and the inner peripheral surface of the expansion portion 123 and the surface of the dynamic core body 122 facing the static magnetic component 11 are surrounded to form the groove 125, the surface of the dynamic core body 122 facing the static magnetic component 11 forms the middle portion 126 of the second magnetic pole surface 121, and the surface of the expansion portion 123 facing the static magnetic component 11 forms the peripheral portion 127 of the second magnetic pole surface 121. Thus, in the process of connecting the amplifying portion 123 to the moving core body 122 to form the dynamic magnetic conductive part 12, the surfaces of the amplifying portion 123 and the moving core body 122 facing the static magnetic conductive part 11 are not flush, so that after the amplifying portion 123 and the moving core body 122 are fixedly connected, a groove 125 is formed between the amplifying portion 123 and the moving core body 122. There is no need to form the groove 125 through an additional process, which is conducive to simplifying the preparation process of the dynamic magnetic conductive part 12 and reducing the preparation cost. In this embodiment, the connection method between the amplifying portion 123 and the moving core body 122 includes but is not limited to any applicable connection method such as welding, riveting, snapping, gluing, etc. Of course, in other embodiments, the moving core body 122 and the amplifying portion 123 can also be an integral structure, and the groove 125 can be formed after the integral molding by designing the mold of the dynamic magnetic conductive part 12, or the groove 125 can be provided on the dynamic magnetic conductive part 12 through any other applicable process.

[0060] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0061] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An electromagnetic drive mechanism, characterized in that: include: A static magnetic conductive member having a first magnetic pole surface; a dynamic magnetic conductive member having a second magnetic pole surface opposite to the first magnetic pole surface; The coil is fixed relative to the static magnetic conductive member and is arranged circumferentially around the dynamic magnetic conductive member; The dynamic magnetic conductive member can move relative to the coil to approach or move away from the static magnetic conductive member; A perpendicular distance between a portion of the first magnetic pole surface and the second magnetic pole surface is greater than a perpendicular distance between the remaining surfaces.

2. The electromagnetic drive mechanism according to claim 1, characterized in that: A groove is provided on at least one of the first magnetic pole surface and the second magnetic pole surface.

3. The electromagnetic drive mechanism according to claim 1, wherein: The first magnetic pole surface has a middle portion and a peripheral portion arranged around the middle portion, and the second magnetic pole surface has a middle portion and a peripheral portion arranged around the middle portion. The distance between the middle portion of the first magnetic pole surface and the middle portion of the second magnetic pole surface is greater than the distance between the peripheral portion of the first magnetic pole surface and the peripheral portion of the second magnetic pole surface.

4. The electromagnetic drive mechanism according to claim 3, characterized in that: A groove is provided on at least one of the first magnetic pole surface and the second magnetic pole surface, the bottom wall of the groove forms the middle portion, and the peripheral portion is arranged around the groove.

5. The electromagnetic drive mechanism according to claim 4, characterized in that: The first magnetic pole surface is a flat surface, and the second magnetic pole surface is provided with the groove; or, The groove is provided on the first magnetic pole surface, and the second magnetic pole surface is a flat surface; or, The grooves are provided on both the first magnetic pole surface and the second magnetic pole surface, and the grooves on the first magnetic pole surface and the second magnetic pole surface are opposite to each other.

6. The electromagnetic drive mechanism according to claim 4, characterized in that: A first accommodating groove is provided on the first magnetic pole surface of the static magnetic component, and a second accommodating groove opposite to the first accommodating groove is provided on the second magnetic pole surface of the dynamic magnetic component. The electromagnetic drive mechanism also includes an elastic element, and the two ends of the elastic element are respectively provided in the first accommodating groove and the second accommodating groove. The elastic element can be compressed when the dynamic magnetic component and the static magnetic component approach each other.

7. The electromagnetic drive mechanism according to claim 6, characterized in that: When the first magnetic pole surface is provided with the groove, the first accommodating groove is opened in the middle of the first magnetic pole surface and communicated with the groove; when the second magnetic pole surface is provided with the groove, the second accommodating groove is opened in the middle of the second magnetic pole surface and communicated with the groove.

8. The electromagnetic drive mechanism according to claim 1, wherein: The dynamic magnetic conductive component includes a dynamic core body and an amplification part connected to the dynamic core body. The amplification part is arranged around one end of the dynamic core body facing the static magnetic conductive component and around the dynamic core body. The dynamic core body and the surface of the amplification part facing the static magnetic conductive component together constitute the second magnetic pole surface. The projection of the first magnetic pole surface on the second magnetic pole surface roughly coincides with the second magnetic pole surface.

9. The electromagnetic drive mechanism according to claim 8, characterized in that: A groove is provided on the side of the moving core body facing the static magnetic member; or The surface of the amplification portion facing the static magnetic component is protruded toward the side where the static magnetic component is located relative to the surface of the moving core body facing the static magnetic component. The inner circumferential surface of the amplification portion and the surface of the moving core body facing the static magnetic component form a groove.

10. The electromagnetic drive mechanism according to claim 1, wherein: The electromagnetic drive mechanism further includes a magnetic conductive connecting member and a magnetic circuit constraining member, wherein the dynamic magnetic conductive member is located between the magnetic conductive connecting member and the magnetic circuit constraining member, and the static magnetic conductive member is located on a side of the magnetic conductive connecting member facing the dynamic magnetic conductive member; Alternatively, the electromagnetic drive mechanism further includes a magnetic circuit constraint member, the static magnetic permeable member is connected to the magnetic circuit constraint member, and the dynamic magnetic permeable member is located between the static magnetic permeable member and the magnetic circuit constraint member.

11. A high voltage DC relay, characterized in that: It comprises a contact portion and the electromagnetic drive mechanism according to any one of claims 1 to 10, wherein the static magnetic conductive part and the dynamic magnetic conductive part of the electromagnetic drive mechanism approach each other or move away from each other to drive the contact portion to close or open.

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