Electromagnet device and contactor

Abstract

The application provides an electromagnet device and a contactor, and relates to the technical field of electrical equipment. The electromagnet device comprises a first magnetic yoke, a second magnetic yoke, an armature and an electromagnetic coil. The first magnetic yoke is arranged on the top of the second magnetic yoke, and the bottom wall of the second magnetic yoke is provided with a magnetic yoke part; the armature is movably arranged on the first magnetic yoke, and the end of the armature is arranged opposite to the magnetic yoke part; the electromagnetic coil is arranged between the first magnetic yoke and the second magnetic yoke, and the electromagnetic coil is arranged around the armature. By adopting the split type first magnetic yoke and second magnetic yoke, and making the armature pass through the first magnetic yoke and correspond to the magnetic yoke part of the second magnetic yoke, compared with the existing electromagnet device, the weight of the armature is effectively reduced, the problem of small suction force is solved, and the rebound phenomenon of the armature in the suction process is reduced.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment technology, and more specifically, to an electromagnet device and a contactor. Background Technology

[0002] In the design of electromagnets and similar electromagnetic attraction devices, the matching between magnetic circuit performance and mechanical structure is a key factor affecting their operational reliability. In existing technologies, electromagnetic attraction devices generally suffer from insufficient initial magnetic flux, directly resulting in weak attraction force during startup, making it difficult to meet the requirements of rapid response or heavy load conditions. Furthermore, in practical applications, space constraints limit the possibility of increasing coil size to improve attraction force; while increasing the pull-in current leads to higher power consumption and requires a larger power supply, increasing operating costs. These limitations make it difficult for electromagnetic attraction devices to achieve the expected attraction force, especially in miniaturized devices requiring high attraction force output, where this contradiction is particularly pronounced. Summary of the Invention

[0003] This invention provides an electromagnet device and contactor that effectively reduces the weight of the armature, solves the problem of insufficient attraction force, and helps reduce the bouncing phenomenon of the armature during the attraction process; it also solves the problem of increased cost caused by increasing the number of coil turns or increasing the current.

[0004] The embodiments of the present invention can be implemented as follows:

[0005] In a first aspect, the present invention provides an electromagnet device, comprising:

[0006] First magnetic yoke;

[0007] The second magnetic yoke is provided with the first magnetic yoke disposed on the top of the second magnetic yoke, and the second magnetic yoke is provided with a magnetic yoke portion;

[0008] An armature is movably disposed on the first magnetic yoke, and the end of the armature is disposed opposite to the magnetic yoke.

[0009] An electromagnetic coil is disposed between the first magnetic yoke and the second magnetic yoke, and the electromagnetic coil is looped around the armature.

[0010] In an optional embodiment, the magnetic yoke protrudes from the second magnetic yoke and extends in the direction toward the armature, and the electromagnetic coil is arranged around the armature and the magnetic yoke.

[0011] In an optional embodiment, the first magnetic yoke is further provided with a through hole, and the armature is movably inserted through the through hole.

[0012] In an optional embodiment, the first magnetic yoke includes a top plate and two first side plates, with the two ends of the top plate respectively connected to the two first side plates. The armature is movably disposed on the first magnetic yoke, and the end of the first side plate away from the top plate is engaged with the second magnetic yoke.

[0013] In an optional embodiment, the wall surface of the second magnetic yoke where the magnetic yoke portion is provided is further provided with two first limiting portions, and the end of the first side plate is disposed between the two first limiting portions.

[0014] In an optional embodiment, a second limiting portion is further provided at the end of the first side plate, the second limiting portion being used to abut against the wall surface of the second magnetic yoke away from the first limiting portion.

[0015] In an optional embodiment, the first magnetic yoke has through holes at both ends;

[0016] The second magnetic yoke includes a base plate and second side plates connected to both ends of the base plate. The magnetic yoke protrudes from the base plate. The end of the second side plate is provided with a mounting portion. The mounting portion extends in a direction away from the base plate. The mounting portion is connected to the through hole by a riveting process.

[0017] In an optional embodiment, the width of the mounting portion gradually decreases in the direction away from the base plate.

[0018] In an optional embodiment, the base plate is provided with mounting holes for mounting and fixing components to fix the second magnetic yoke.

[0019] In an optional embodiment, the first magnetic yoke and the second magnetic yoke are connected by a riveting process.

[0020] In a second aspect, the present invention provides a contactor comprising an electromagnet device as described in any of the foregoing embodiments.

[0021] The beneficial effects of the electromagnet device and contactor provided in the embodiments of the present invention include: by adopting a split first magnetic yoke and a second magnetic yoke, and enabling the armature to pass through the first magnetic yoke and correspond to the magnetic yoke portion of the second magnetic yoke, the weight of the armature is effectively reduced compared with the existing electromagnetic device. This not only solves the problem of low attraction force, but also helps to reduce the bouncing phenomenon of the armature during the attraction process. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a first-view structural schematic diagram of the electromagnet device provided in the first embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the first embodiment of the electromagnet device provided in this invention from a second perspective.

[0025] Figure 3 This is a schematic diagram of the second embodiment of the electromagnet device provided in this invention.

[0026] Figure 4 An exploded view of a second embodiment of the electromagnet device provided in this invention;

[0027] Figure 5 This is a cross-sectional view of a second embodiment of the electromagnet device provided in this invention.

[0028] Icons: 10-Electromagnetic device; 100-First yoke; 110-Through hole; 120-Top plate; 130-First side plate; 140-Second limiting part; 150-Through hole; 200-Second yoke; 210-First limiting part; 220-Base plate; 221-Yoke; 222-Mounting hole; 230-Second side plate; 231-Mounting part; 300-Armature; 400-Electromagnetic coil. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention 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, and therefore should not be construed as a limitation of this invention.

[0033] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0034] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0035] In the design of electromagnets and similar electromagnetic attraction devices, the matching between magnetic circuit performance and mechanical structure is a key factor affecting their operational reliability. In existing technologies, electromagnetic attraction devices generally suffer from insufficient initial magnetic flux, which directly results in weak attraction force during the startup phase, making it difficult to meet the requirements of rapid response or heavy load conditions. Furthermore, in practical applications, space constraints limit the possibility of increasing coil size or increasing current to improve attraction force. This limitation makes it difficult for electromagnetic attraction devices to achieve the expected attraction force, especially in miniaturized devices requiring high attraction force output, where this contradiction is particularly prominent.

[0036] Meanwhile, as the core moving component in an electromagnetic attraction device, the weight design of the armature has a significant impact on overall performance. A heavy armature not only increases the energy consumption required for actuation but may also exacerbate contact bounce, thus affecting the device's operational stability and lifespan. Furthermore, a heavy armature further restricts the improvement of attraction force, causing the device to perform poorly under complex operating conditions. Therefore, optimizing the magnetic circuit design to increase initial magnetic flux, overcoming the attraction force bottleneck caused by coil size limitations, and simultaneously controlling the armature weight to improve contact bounce have become pressing technical challenges in this field.

[0037] Based on the problems existing in the current technology, please refer to Figures 1 to 5This invention provides an electromagnet device 10, applicable to the field of electrical equipment technology, particularly suitable for contactors, electrical switches, and related equipment. The electromagnet device 10 provided by this invention effectively reduces the weight of the armature 300, not only solving the problem of insufficient attraction force but also reducing the bouncing phenomenon of the armature 300 during the attraction process; furthermore, it solves the problem of increased cost due to increasing the number of coil turns or increasing the current.

[0038] For details, please refer to Figure 1 The electromagnet device 10 includes a first magnetic yoke 100, a second magnetic yoke 200, an armature 300, and an electromagnetic coil 400.

[0039] The first magnetic yoke 100 is disposed on the top of the second magnetic yoke 200, and the bottom wall of the second magnetic yoke 200 is provided with a magnetic yoke portion 221; the armature 300 is movably disposed on the first magnetic yoke 100, and the end of the armature 300 is disposed opposite to the magnetic yoke portion 221; the electromagnetic coil 400 is disposed between the first magnetic yoke 100 and the second magnetic yoke 200, and the electromagnetic coil 400 is arranged around the armature 300.

[0040] In practical applications, by energizing the electromagnetic coil 400 to generate a magnetic field, a closed magnetic circuit is formed between the first magnetic yoke 100, the second magnetic yoke 200 and the armature 300, and an attractive force is generated to attract the armature 300, thereby driving the armature 300 to move.

[0041] It is worth noting that in existing electromagnetic devices, the yoke and armature are integrated into a single structure, resulting in a relatively heavy armature. Therefore, the electromagnetic device provided in this embodiment employs a separate first yoke 100 and second yoke 200, allowing the armature 300 to pass through the first yoke 100 and correspond to the yoke portion 221 of the second yoke 200. This effectively reduces the weight of the armature 300 compared to existing electromagnetic devices, solving the problem of insufficient attraction force and reducing or even eliminating the bouncing phenomenon of the armature 300 during attraction.

[0042] Specifically, due to its structural characteristics, the existing integrated magnetic yoke structure requires the armature 300 and coil to be installed from the side of the magnetic yoke during installation. Therefore, the magnetic yoke 221 of this structure can only be recessed downwards, while the corresponding armature needs to be protruded downwards. This increases the mass of the armature, thus increasing the attraction force. Moreover, the left and right gap between the integrated magnetic yoke structure and the armature is not fixed, and the magnetic yoke does not limit the armature, making the left and right gap between the armature and the magnetic yoke unstable.

[0043] For the existing split magnetic yoke structure, that is, the upper magnetic yoke and the lower magnetic yoke are connected separately, and the upper magnetic yoke and the armature are integrally formed, this will result in air gaps at the left and right connection points of the upper magnetic yoke and the lower magnetic yoke, as well as between the armature and the magnetic yoke part 221 of the lower magnetic yoke, thus increasing the attraction force.

[0044] Therefore, compared with existing devices, the electromagnetic device provided in this embodiment of the invention, by adopting a split first magnetic yoke 100 and a second magnetic yoke 200, and by allowing the armature 300 to be movably inserted through the first magnetic yoke 100, can make the armature 300 more stable relative to the first magnetic yoke 100, and can also ensure that the armature 300 is lighter in weight, and there is only an air gap between the armature 300 and the magnetic yoke 221.

[0045] Furthermore, the yoke portion 221 protrudes from the bottom wall of the second yoke member 200 and extends in the direction toward the armature member 300, and the electromagnetic coil 400 is arranged around the armature member 300 and the yoke portion 221.

[0046] In this embodiment, the yoke portion 221 protrudes from the bottom wall of the second yoke member 200 and is positioned opposite to the armature member 300, which is movable relative to the first yoke member 100.

[0047] In other words, by increasing the extension length of the yoke 221, the length of the armature 300 is reduced, thereby further reducing the weight of the armature 300. This makes it easier for the armature 300 to move under a smaller initial attractive force.

[0048] Specifically, because the yoke 221 has a protruding structure, the second yoke 200 has a "mountain" shaped structure. A first magnetic attraction surface in the shape of a "V" is also recessed on the end face of the yoke 221, and a second magnetic attraction surface matching the structure of the first magnetic attraction surface of the yoke 221 is protruding at the end of the armature 300, thereby increasing the initial magnetic flux and thus increasing the initial attraction force.

[0049] Furthermore, such as Figure 1 and Figure 2 As shown, the first magnetic yoke 100 includes a top plate 120 and two first side plates 130. The two ends of the top plate 120 are respectively connected to the two first side plates 130 to form an inverted U-shape. The second magnetic yoke 200 is plate-shaped.

[0050] The armature 300 is movably disposed on the first magnetic yoke 100, and the end of the first side plate 130 away from the top plate 120 is engaged with the second magnetic yoke 200.

[0051] The second magnetic yoke 200 has two protruding first limiting parts 210 on the wall surface where the magnetic yoke part 221 is provided, and the end of the first side plate 130 is located between the two first limiting parts 210.

[0052] Therefore, the two first limiting parts 210 can limit the first side plate 130, thereby preventing the first magnetic yoke 100 from swaying horizontally relative to the second magnetic yoke 200, thus improving the structural stability of the electromagnet device 10.

[0053] Furthermore, a second limiting part 140 is provided at the end of the first side plate 130, which is used to abut against the wall surface of the second magnetic yoke 200 away from the first limiting part 210.

[0054] In other words, by abutting against the bottom wall of the second magnetic yoke 200, the second magnetic yoke 200 can be limited, thus preventing the first magnetic yoke 100 from swaying up and down relative to the second magnetic yoke 200.

[0055] It should be noted that the second limiting part 140 in the figure is in an uncontacted state. In actual applications, the second limiting part 140 can be connected to the bottom wall of the second magnetic yoke 200 by bending and riveting.

[0056] Of course, in other embodiments of the present invention, such as Figures 3 to 5 As shown, the structure of the first magnetic yoke 100 and the second magnetic yoke 200 can also be a split structure as described below.

[0057] Specifically, the first magnetic yoke 100 is plate-shaped; the second magnetic yoke 200 includes a base plate 220 and second side plates 230 connected to both ends of the base plate 220, forming a U-shape.

[0058] Furthermore, the first magnetic yoke 100 is also provided with a through hole 110, and the armature 300 is movably inserted through the through hole 110.

[0059] In this embodiment, the through hole 110 is provided on the top plate 120.

[0060] In this embodiment, the first magnetic yoke 100 and the second magnetic yoke 200 are connected by a riveting process, which is simple and low in cost, and can achieve a firm connection between the first magnetic yoke 100 and the second magnetic yoke 200, which is not easy to loosen. Compared with other connection methods such as welding, no additional filling materials or complex equipment are required.

[0061] In detail, the first magnetic yoke 100 has through holes 150 at both ends.

[0062] The magnetic yoke 221 protrudes from the base plate 220, and the end of the second side plate 230 is provided with a mounting part 231. The mounting part 231 extends in a direction away from the base plate 220, and the mounting part 231 is connected to the through hole 150 by a riveting process.

[0063] In this embodiment, the through hole 110 is disposed in the middle of the first yoke member 100, and the armature member 300 is movably disposed in the through hole 110.

[0064] In this embodiment, both ends of the bottom plate 220 are generally perpendicularly connected to the second side plates 230, forming a "U" shape.

[0065] It can be understood that the yoke portion 221 protrudes from the wall surface of the bottom plate 220 facing the first yoke member 100, and the yoke portion 221 is located at the exact center position of the bottom plate 220.

[0066] It is worth noting that the extension length of the yoke portion 221 is smaller than the length of the second side plate 230.

[0067] By disposing the mounting portion 231 on the end of the second side plate 230 away from the bottom plate 220, and making the mounting portion 231 extend in the direction away from the bottom plate 220, it is convenient to insert the mounting portion 231 through the through hole 150, and the first yoke member 100 and the second yoke member 200 are stably connected together by a riveting process.

[0068] Specifically, the width of the mounting portion 230 gradually decreases in the direction away from the bottom plate 220.

[0069] It can be understood that the width of the top end of the mounting portion 231 is smaller than the width of the through hole 150, so as to ensure that the mounting portion 231 can pass through the through hole 150 for the riveting process, and no air gap exists between the first yoke member 100 and the second yoke member 200 after compression, so as to avoid problems such as increased magnetic resistance, reduced attractive force or increased energy loss caused by the existence of the air gap.

[0070] Further, the bottom plate 220 is provided with a mounting hole 222, which is used for installing a fixing component to fix the second yoke member 200, so as to ensure the mounting stability and firmness of the second yoke member 200.

[0071] Further, the first yoke member 100 is made of a pure iron material.

[0072] It should be noted that the "pure iron material" mentioned in this embodiment refers to an iron material with extremely low carbon content (usually less than 0.02%), containing almost no other alloying elements, and having excellent soft magnetic properties. In addition, this material has high magnetic permeability, can efficiently guide the passage of magnetic fields, and is easy to be magnetized and demagnetized, and is suitable for electromagnetic devices that require frequent switching of working states.

[0073] Therefore, by using the first yoke member 100 made of pure iron material, energy consumption can be further reduced, which is beneficial to forming a larger initial magnetic flux, thereby increasing the initial attractive force.

[0074] Furthermore, the second magnetic yoke 200 is made of soft magnetic sheet material.

[0075] It should be noted that the "soft magnetic sheet material" mentioned in this embodiment refers to a material with low coercivity and high magnetic permeability.

[0076] Therefore, the use of a second magnetic yoke 200 made of soft magnetic sheet material is beneficial for increasing magnetic flux density, reducing energy loss, and enhancing electromagnetic performance.

[0077] In detail, the second magnetic yoke 200 is composed of multiple overlapping soft magnetic sheets.

[0078] It is understandable that multiple soft magnetic sheets are placed vertically; in other words, the plane on which the soft magnetic sheets are located is set perpendicular to the horizontal plane.

[0079] In this embodiment, a second magnetic yoke 200 is formed by overlapping multiple thin, soft magnetic sheets. Based on this, a magnetic yoke portion 221 is integrally formed on the second magnetic yoke 200 to form a single unit.

[0080] In other embodiments of the present invention, the magnetic yoke 221 may also be a separate structure from the second magnetic yoke 200, that is, the magnetic yoke 221 may be detachably installed on the bottom wall of the second magnetic yoke 200.

[0081] In this embodiment, the second magnetic yoke 200 is made of electrical pure iron material, while the magnetic yoke part 221 is made of soft magnetic sheet material, thereby ensuring ease of processing and economy.

[0082] In summary, the embodiments of the present invention provide an electromagnet device 10. By employing a split first magnetic yoke 100 and a second magnetic yoke 200, and enabling the armature 300 to pass through the first magnetic yoke 100 and correspond to the magnetic yoke portion 221 of the second magnetic yoke 200, the weight of the armature 300 is effectively reduced compared with existing electromagnet devices. This not only solves the problem of low attraction force, but also helps to reduce or even eliminate the bouncing phenomenon of the armature 300 during the attraction process.

[0083] Furthermore, this embodiment of the invention also provides a contactor, including the electromagnet device 10 described in the above embodiments.

[0084] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An electromagnet device, characterized in that, include: First magnetic yoke (100); The second magnetic yoke (200) is provided with the first magnetic yoke (100) disposed on the top of the second magnetic yoke (200), and the second magnetic yoke (200) is provided with a magnetic yoke portion (221); An armature (300) is movably disposed on the first magnetic yoke (100), and the end of the armature (300) is disposed opposite to the magnetic yoke (221); An electromagnetic coil (400) is disposed between the first magnetic yoke (100) and the second magnetic yoke (200), and the electromagnetic coil (400) is arranged around the armature (300).

2. The electromagnet device according to claim 1, characterized in that, The magnetic yoke (221) protrudes from the second magnetic yoke (200) and extends in the direction toward the armature (300). The electromagnetic coil (400) is arranged around the armature (300) and the magnetic yoke (221).

3. The electromagnet device according to claim 1, characterized in that, The first magnetic yoke (100) is also provided with a through hole (110), and the armature (300) is movably inserted through the through hole (110).

4. The electromagnet device according to claim 1, characterized in that, The first magnetic yoke (100) includes a top plate (120) and two first side plates (130). The two ends of the top plate (120) are respectively connected to the two first side plates (130). The armature (300) is movably disposed on the first magnetic yoke (100). The end of the first side plate (130) away from the top plate (120) is engaged with the second magnetic yoke (200).

5. The electromagnet device according to claim 4, characterized in that, The second magnetic yoke (200) is provided with two first limiting parts (210) protruding from the wall surface of the magnetic yoke part (221), and the end of the first side plate (130) is provided between the two first limiting parts (210).

6. The electromagnet device according to claim 5, characterized in that, The end of the first side plate (130) is further provided with a second limiting part (140), which is used to abut against the wall surface of the second magnetic yoke (200) away from the first limiting part (210).

7. The electromagnet device according to claim 1, characterized in that, The first magnetic yoke (100) has through holes (150) at both ends; The second magnetic yoke (200) includes a base plate (220) and a second side plate (230) connected to both ends of the base plate (220). The magnetic yoke part (221) protrudes from the base plate (220). The end of the second side plate (230) is provided with a mounting part (231). The mounting part (231) extends in a direction away from the base plate (220). The mounting part (231) is connected to the through hole (150) by a riveting process.

8. The electromagnet device according to claim 7, characterized in that, The width of the mounting portion (231) gradually decreases in the direction away from the base plate (220).

9. The electromagnet device according to claim 7, characterized in that, The base plate (220) is provided with mounting holes (222), which are used to install fixing components to fix the second magnetic yoke (200).

10. The electromagnet device according to claim 1, characterized in that, The first magnetic yoke (100) and the second magnetic yoke (200) are connected by a riveting process.

11. A contactor, characterized in that, Includes the electromagnet device as described in any one of claims 1-10.

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