Electromagnetic contactor dustproof arc extinguishing structure and electromagnetic contactor

Abstract

The utility model discloses a dustproof arc extinguishing structure of an electromagnetic contactor and the electromagnetic contactor, and belongs to the technical field of contactors. The dustproof arc extinguishing structure comprises a dustproof cover plate, a dustproof pedestal and a dustproof base. The dustproof cover plate is embedded in the opening of the first end of the dustproof base, and the dustproof base sleeves the periphery of the second end of the dustproof base to form a sealed space; a dustproof buckle is arranged on the inner side wall of the dustproof cover plate and matched with a dustproof groove in the dustproof base to form a first guide limiting structure, and the dustproof effect is enhanced; an insertion core is installed in the middle of the dustproof base, cross beams are arranged on the two sides of the dustproof base, a plurality of grid pieces are fixed to the cross beams, arc extinguish chambers are formed between the adjacent grid pieces, and the arc extinguish chambers can be rapidly stretched, cooled and extinguished when a circuit of the contactor is disconnected. In addition, a dustproof flange is arranged at the top end of the dustproof base, and the dustproof effect and installation stability are further ensured. According to the dustproof arc extinguishing structure, the electromagnetic contactor can stably and reliably work in an industrial environment with a large amount of dust, and the equipment failure rate is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of contactor, more particularly to a dustproof arc extinguishing structure of electromagnetic contactor and electromagnetic contactor. BACKGROUND

[0002] Electromagnetic contactor is a kind of electric switch equipment widely used in industrial automation system, mainly used for the on-off control of circuit. Through the drive of electromagnetic system, contactor can quickly respond to control signal, realize the control to motor, lighting equipment, heating element and other loads. Due to its simple structure, fast response speed, high reliability and other advantages, electromagnetic contactor has been widely used in high-low voltage electric control system. Especially in various mechanical equipment, the stable performance of electromagnetic contactor directly affects the operation efficiency and safety of the whole system.

[0003] However, the existing electromagnetic contactor has significant deficiencies in dustproof performance. Many contactors adopt open or semi-closed design, which cannot effectively isolate external dust and pollutants. In the industrial environment with more dust, such as building material processing machinery, metal processing machinery, textile machinery, etc., these contactors are easily eroded by dust, leading to damage of internal electrical components. The accumulation of dust not only affects the contact performance of the contact, causes poor current transmission, but also may cause internal overheating, further shortens the service life of the contactor and increases the equipment failure rate. In this case, the reliability of electromagnetic contactor is greatly reduced, which seriously affects the continuity and efficiency of industrial production.

[0004] In the arc extinguishing technology, although the existing electromagnetic contactor can realize basic arc suppression function, it still has many limitations in actual application. For example, although the arc extinguishing effect of vacuum contactor is good, due to its complex structure and high cost, its application in some industrial environments is limited. The manufacturing process of vacuum contactor requires high requirements, and its maintenance is complex, and when it is applied in the circuit with low rated working voltage and current, its advantage is not obvious. Therefore, for many industrial application occasions that require low cost and easy maintenance, the existing vacuum contactor is difficult to meet the actual demand. UTILITY MODEL CONTENTS

[0005] The utility model provides a dustproof arc extinguishing structure of electromagnetic contactor and electromagnetic contactor to overcome at least one technical problem existing in the above prior art.

[0006] To solve the above technical problems, the technical scheme of the utility model is as follows:

[0007] A dustproof arc extinguishing structure of electromagnetic contactor, the dustproof arc extinguishing structure of electromagnetic contactor includes dustproof cover plate, dustproof base and dustproof base, wherein:

[0008] The dustproof cover plate is embedded in the opening of the first end of the dustproof base along a first direction, and the dustproof base is sleeved on the periphery of the second end of the dustproof base along the first direction;

[0009] An insertion core is mounted at the middle position of the dustproof base, and the dustproof base is provided with a cross beam extending along a second direction on each side of the insertion core, and the second direction is perpendicular to the first direction; a plurality of louvers are fixedly connected to the cross beam, and the louvers are spaced apart from each other, and the space between adjacent two louvers forms an arc extinguishing chamber;

[0010] A plurality of dustproof buckles are arranged on the inner side wall of the dustproof cover plate and extend along the first direction; a dustproof groove extending along the first direction is arranged on each side wall of each louver, two dustproof grooves between adjacent two louvers form a first guide limiting structure, the number of the first guide limiting structure is consistent with the number of the dustproof buckles; the first guide limiting structure is configured to guide and limit the two sides of the dustproof buckle through the two dustproof grooves when the dustproof cover plate is embedded in the dustproof base.

[0011] Further, two symmetrical auxiliary hanging buckles are arranged on the outer side wall of the dustproof cover plate, and one dustproof terminal post baffle is fixedly connected to each side of the dustproof cover plate, and a plurality of terminal holes are arranged on the side wall of each dustproof terminal post baffle.

[0012] Further, at least one positioning buckle is arranged on the outer side wall of each dustproof terminal post baffle.

[0013] The inner side wall of the dustproof base is provided with a positioning groove matched with the dustproof base.

[0014] Further, a plurality of first terminal post mounting holes are arranged on the dustproof cover plate, and a plurality of second terminal post mounting holes corresponding to the first terminal post mounting holes are arranged on the dustproof base.

[0015] The number of the first terminal post mounting holes is the same as that of the second terminal post mounting holes, and each first terminal post mounting hole is aligned with the corresponding second terminal post mounting hole in the first direction.

[0016] Further, the number of the arc extinguishing chambers is 8, and two auxiliary mounting holes are arranged on each side wall of the dustproof base.

[0017] Further, a thermal relay mounting groove and a surge suppressor mounting groove are arranged on each side wall of the dustproof base; a plurality of first auxiliary hanging grooves are arranged on the dustproof base; and two third terminal post mounting holes are further arranged on the side wall of the dustproof base where the surge suppressor mounting groove is arranged.

[0018] Further, the dustproof base is a groove-shaped structure with one end open, and the open end of the dustproof base is a top end;

[0019] The top end of the dustproof base is provided with a plurality of connecting buckles, and the dustproof base is provided with connecting grooves matched with the connecting buckles.

[0020] The middle part of the bottom end of the dustproof base is provided with a groove, and the inner walls on both sides of the groove are provided with strip-shaped protrusions extending in a second direction, and a gap is provided between the strip-shaped protrusions and the groove bottom.

[0021] Further, mounting through holes are formed at four corners of the bottom end of the dustproof base, and a coil framework is mounted in the hollow part of the dustproof base.

[0022] The edge part of the top end of the dustproof base is provided with a plurality of dustproof flanges, and the dustproof base is provided with dustproof grooves matched with the dustproof flanges.

[0023] Further, the two side walls of the plug core are respectively provided with a second auxiliary hanging groove, and the two side walls of the dustproof base are respectively provided with a hanging hole corresponding to the second auxiliary hanging groove; each second auxiliary hanging groove is aligned with the corresponding hanging hole.

[0024] A plurality of contact mounting holes are formed on the plug core, and a wiring post type straight static contact bridge and a wiring post type bent static contact bridge are arranged side by side on the plug core.

[0025] The wiring post type straight static contact bridge is a straight metal sheet, and the wiring post type bent static contact bridge is a metal sheet with one end bent.

[0026] An electromagnetic contactor, comprising the dustproof arc extinguishing structure of the electromagnetic contactor.

[0027] Compared with the prior art, the electromagnetic contactor provided by the technical scheme has the advantages that:

[0028] The dustproof arc extinguishing structure of the electromagnetic contactor provided by the technical scheme can make the electromagnetic contactor work stably and reliably in an environment with a large amount of dust, reduce the equipment failure rate caused by environmental dust, effectively process electric arcs through the design of multiple arc extinguishing chambers, protect the contact, prolong the service life of the contactor, and reduce the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0030] Figure 1 is a structural schematic diagram of a dustproof arc extinguishing structure of an electromagnetic contactor provided in an embodiment of the present application;

[0031] Figure 2 is Figure 1 is a structural schematic diagram of a first view angle of a dustproof cover plate in the dustproof arc extinguishing structure of the electromagnetic contactor shown in the figure;

[0032] Figure 3 is Figure 1 is a structural schematic diagram of a second view angle of the dustproof cover plate in the dustproof arc extinguishing structure of the electromagnetic contactor shown in the figure;

[0033] Figure 4 is Figure 1 is a structural schematic diagram of the dustproof arc extinguishing structure of the electromagnetic contactor after removing the dustproof cover plate shown in the figure;

[0034] Figure 5 is Figure 1 is a structural schematic diagram of a first view angle of a dustproof base in the dustproof arc extinguishing structure of the electromagnetic contactor shown in the figure;

[0035] Figure 6 is Figure 1 is a structural schematic diagram of a second view angle of the dustproof base in the dustproof arc extinguishing structure of the electromagnetic contactor shown in the figure;

[0036] Figure 7 is a structural schematic diagram of a first view angle of a plug core in the dustproof arc extinguishing structure of the electromagnetic contactor provided in an embodiment of the present application;

[0037] Figure 8 is a structural schematic diagram of a second view angle of the plug core in the dustproof arc extinguishing structure of the electromagnetic contactor provided in an embodiment of the present application;

[0038] Figure 9 is a structural schematic diagram of a plug-in post type straight static contact bridge and a plug-in post type bent static contact bridge in the plug core provided in an embodiment of the present application;

[0039] Figure 10 is Figure 1 is a structural schematic diagram of a first view angle of a dustproof base in the dustproof arc extinguishing structure of the electromagnetic contactor shown in the figure;

[0040] Figure 11 is Figure 1The second perspective view of the dustproof base in the dustproof arc extinguishing structure of the electromagnetic contactor is shown in the structural schematic diagram.

[0041] Figure 12 The second perspective view of the dustproof base in the dustproof arc extinguishing structure of the electromagnetic contactor is shown in the structural schematic diagram. Figure 1 The second perspective view of the dustproof base in the dustproof arc extinguishing structure of the electromagnetic contactor is shown in the structural schematic diagram.

[0042] Figure 13 The second perspective view of the dustproof base in the dustproof arc extinguishing structure of the electromagnetic contactor is shown in the structural schematic diagram.

[0043] The mark in the figure is explained:

[0044] 1, dustproof cover plate; 101, first terminal post mounting hole; 102, auxiliary hanging buckle; 103, positioning buckle; 104, wiring hole; 105, dustproof terminal post baffle; 106, dustproof buckle;

[0045] 2, dustproof base; 201, second terminal post mounting hole; 202, auxiliary mounting hole; 203, dustproof groove; 204, arc extinguishing chamber; 205, cross beam; 206, grid piece; 207, hanging hole;

[0046] 3, dustproof base; 301, thermal relay mounting groove; 302, groove; 3021, strip-shaped protrusion; 303, first auxiliary hanging groove; 304, mounting through hole; 305, surge suppressor mounting groove; 306, third terminal post mounting hole; 307, connecting buckle; 308, dustproof flange;

[0047] 4, coil former;

[0048] 5, plug core; 501, second auxiliary hanging groove; 502, contact mounting hole; 503, terminal post type straight static contact bridge; 504, terminal post type bent static contact bridge. DETAILED DESCRIPTION

[0049] In the following description, numerous specific details are given to provide a thorough understanding of the application. However, it will be apparent that the application can be practiced without one or more of these specific details. In other instances, well-known techniques have not been described in order to avoid obscuring the application.

[0050] It should be understood that the application can be practiced with modification and change within the scope of the appended claims. The application is not limited to the embodiments presented, but the scope of the application is defined by the following claims. In the drawings, the dimensions and relative dimensions of the layers and regions can be exaggerated for clarity. Like reference numerals refer to elements throughout.

[0051] In the description of this utility model, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. The specific dimensions used in the embodiments are only for illustrating the technical solution and do not limit the protection scope of this utility model. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art.

[0052] Unless otherwise expressly specified and limited, the terms "installation," "setting," "connection," and "fixation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0053] To fully understand this application, a detailed structure will be presented in the following description to illustrate the technical solutions proposed in this application. Preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other implementation methods.

[0054] Example 1:

[0055] like Figures 1-6 As shown, this utility model provides a technical solution:

[0056] A dustproof and arc-extinguishing structure for an electromagnetic contactor, such as Figure 1 As shown, the dustproof and arc-extinguishing structure of the electromagnetic contactor includes a dustproof cover plate 1, a dustproof base 2, and a dustproof base 3, wherein:

[0057] The dust cover 1 is along the first direction (e.g.) Figure 1 The dustproof base 3 is fitted into the opening at the first end of the dustproof base 2 in the X direction shown, and the dustproof base 3 is sleeved around the second end of the dustproof base 2 along the first direction.

[0058] like Figures 4-6 As shown, a core 5 is installed in the middle of the dustproof base 2, and the dustproof base 2 has a vent on each side of the core 5 along a second direction (e.g., Figure 4 A crossbeam 205 extending in the Y direction (as shown) is perpendicular to the first direction; a plurality of grid plates 206 are fixedly connected to the crossbeam 205, the grid plates 206 are spaced apart, and the space between two adjacent grid plates 206 forms an arc-extinguishing chamber 204.

[0059] As Figures 2-3 shown, the inner side wall of the dust cover plate 1 is provided with a plurality of dustproof buckles 106 extending in the first direction; continue to refer to Figure 4 and Figure 6 , the two side walls of each grid 206 are provided with dustproof grooves 203 extending in the first direction, and the two dustproof grooves 203 between adjacent two grids 206 form a first guide limiting structure, the number of the first guide limiting structure is consistent with the number of the dustproof buckles 106; the first guide limiting structure is configured to guide and limit the two sides of the dustproof buckles 106 through the two dustproof grooves 203 when the dust cover plate 1 is embedded in the dustproof base 2; that is, every two opposite dustproof grooves 203 guide and limit the two sides of a corresponding dustproof buckle 106, and can enhance the dustproof effect and prevent external dust from entering the contactor.

[0060] In this embodiment, the shell of the electromagnetic contactor dustproof arc extinguishing structure adopts a closed design, and the dust cover plate 1, the dustproof base 2 and the dustproof base 3 are tightly matched through the clamping groove connection mode to form a sealed space. By forming a relatively closed space through the shell and the cover, dust and pollutants can be prevented from entering the contactor. This design can effectively isolate external dust and protect internal electrical components from damage.

[0061] And when the contactor breaks the circuit, the arc generated will be introduced into the arc extinguishing chamber 204, and through the action of the arc extinguishing grid structure, the arc is quickly lengthened, cooled and extinguished. The design of the arc extinguishing chamber 204 can be used in circuits with low rated working voltage and current to realize the functions of circuit closing and breaking, and has the advantages of simple structure and low cost.

[0062] Embodiment 2:

[0063] Based on embodiment 1, continue to refer to Figures 2-3 , the outer side wall of the dust cover plate 1 is provided with two symmetrical auxiliary hanging buckles 102, and the two sides of the dust cover plate 1 are respectively fixedly connected with a dustproof terminal post baffle 105, and the side wall of each dustproof terminal post baffle 105 is provided with a plurality of terminal holes 104.

[0064] Further, as Figure 2 shown, the outer side wall of each dustproof terminal post baffle 105 is provided with at least one positioning buckle 103;

[0065] The inner side wall of the dustproof base 2 is provided with a positioning groove matched with the dustproof base 2.

[0066] Further, as Figures 2-4As shown, the dustproof cover plate 1 is provided with a plurality of first terminal post mounting holes 101, and the dustproof base 2 is provided with a plurality of second terminal post mounting holes 201 corresponding to the first terminal post mounting holes 101;

[0067] The number of the first terminal post mounting holes 101 is the same as that of the second terminal post mounting holes 201, and each first terminal post mounting hole 101 is aligned with the corresponding second terminal post mounting hole 201 in the first direction.

[0068] Further, the application adopts a terminal post type screw design. Because the terminal post screw has a large head thread part, it is convenient to tighten the operation; it is convenient to install different specifications of electric wires and cables, and can ensure reliable connection between the electric wire and the contactor, preventing loosening or falling off during current transmission.

[0069] Further, as shown in the Figures 4-6 As shown, the number of arc extinguishing chambers 204 is 8, and the two side walls of the dustproof base 2 are each provided with two auxiliary mounting holes 202.

[0070] Further, as shown in the Figures 10-11 As shown, the two side walls of the dustproof base 3 are respectively provided with a thermal relay mounting groove 301 and a surge suppressor mounting groove 305; the dustproof base 3 is provided with a plurality of first auxiliary hanging grooves 303; as shown in the Figure 12 As shown, the side wall of the dustproof base 3 provided with the surge suppressor mounting groove 305 is further provided with two third terminal post mounting holes 306.

[0071] Further, the auxiliary contact of the application can be normally closed and normally open, or normally closed and normally open, which expands the application scenario of the contactor, so that it can not only realize basic motor start-stop control, but also serve as an execution element of signal transmission, interlocking protection and the like.

[0072] Further, as shown in the Figure 10 As shown, the dustproof base 3 is a slot-shaped structure with one end open, and the open end of the dustproof base 3 is a top end;

[0073] The top end of the dustproof base 3 is provided with a plurality of connecting buckles 307, and the dustproof base 2 is provided with a connecting groove matched with the connecting buckles 307;

[0074] As shown in the Figure 11 As shown, the middle part of the bottom end of the dustproof base 3 is provided with a groove 302, the two side inner walls of the groove 302 are each provided with a strip-shaped protrusion 3021 extending in a second direction, a gap is preset between the strip-shaped protrusion 3021 and the groove bottom of the groove 302, and the gap between the strip-shaped protrusion 3021 and the groove bottom of the groove 302 forms a second guide limiting structure, i.e., a guide rail mounting hole.

[0075] Further, as Figure 10 shown, the four corners of the bottom end of the dustproof base 3 are provided with mounting holes 304, and the hollow part of the dustproof base 3 is provided with a coil skeleton 4, and the structure of the coil skeleton 4 is as Figure 13 shown.

[0076] As Figure 12 shown, the edge part of the top end of the dustproof base 3 is provided with a plurality of dustproof flanges 308, and the dustproof base 2 is provided with a dustproof groove corresponding to the dustproof flange 308.

[0077] Further, as Figure 7 shown, the two side walls of the plug core 5 are respectively provided with a second auxiliary hanging groove 501, and as Figure 5 shown, the two side walls of the dustproof base 2 are respectively provided with a hanging hole 207 corresponding to the second auxiliary hanging groove 501; each second auxiliary hanging groove 501 is aligned with the corresponding hanging hole 207.

[0078] As Figures 7-8 shown, the plug core 5 is provided with a plurality of contact mounting holes 502, and the plug core 5 is also provided with a wire column type straight static contact bridge 503 and a wire column type bent static contact bridge 504 which are developed independently by our company.

[0079] As Figure 9 shown, the wire column type straight static contact bridge 503 is a straight metal sheet, and the wire column type bent static contact bridge 504 is a metal sheet with one end bent.

[0080] Embodiment 3:

[0081] The utility model provides a technical scheme:

[0082] An electromagnetic contactor, the electromagnetic contactor includes the dustproof arc extinguishing structure of electromagnetic contactor, and the electromagnetic contactor is a kind of electrical switchgear with segmented ac power circuit function, can be widely applied to high-low voltage electric control system in industrial production.The electromagnetic contactor with the dustproof arc extinguishing structure of electromagnetic contactor described above is suitable for the control and protection of various electrical equipment, especially in the environment with more dust, such as building material processing machinery, metal processing machinery, textile machinery, construction machinery, petroleum, machine tool, cement, chemical industry, photovoltaic, wind power and other industries.In these industries, dustproof arc extinguishing type electromagnetic contactor can work stably and reliably, reduce the equipment failure rate caused by environmental pollution, and improve the overall operation efficiency of production line.

[0083] Further, the electromagnetic contactor is mainly composed of a contact system, an electromagnetic system, and an insulating support body; the contact system is used for switching on and switching off the circuit; the electromagnetic system is used for generating magnetic force to drive the contact system to act; and the insulating support body is used for supporting and fixing each component and ensuring electrical insulation therebetween.

[0084] Each device (parts without specific structure) selected in the present application is a general standard part or a part known to those skilled in the art, the structure and principle of which can be known by the skilled person through a technical manual or through a conventional experimental method. Moreover, the software programs involved in the present application are prior art, and the present application does not involve any improvement on the software programs.

[0085] Although the example embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the example embodiments are only exemplary and are not intended to limit the scope of the present application. Those of ordinary skill in the art can make various changes and modifications without departing from the scope and spirit of the present application. All such changes and modifications are intended to be included within the scope of the present application as claimed in the appended claims.

[0086] Similarly, it is to be understood that, in order to simplify the present application and help understand one or more of the various application aspects, in the description of the example embodiments of the present application, various features of the present application are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of the present application should not be interpreted as reflecting an intention that the claimed present application requires more features than those explicitly recited in each claim. Rather, as reflected by the corresponding claims, the application point is that the corresponding technical problem can be solved with fewer features than all the features of a certain disclosed single embodiment. Therefore, the claims following the specific description are hereby expressly incorporated into the specific description, with each claim itself being a separate embodiment of the present application.

[0087] In addition, those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments means to be within the scope of the present application and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0088] It should be noted that the above embodiments illustrate the present application rather than limit the present application, and those skilled in the art can design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbols located between parentheses should not be construed as limiting the claims. The use of the words first, second, and third, etc. does not indicate any order. These words can be interpreted as names.

Claims

1. A dustproof and arc-extinguishing structure for an electromagnetic contactor, characterized in that, The dustproof arc extinguishing structure of the electromagnetic contactor comprises a dustproof cover plate (1), a dustproof base (2) and a dustproof base (3), wherein: The dustproof cover plate (1) is embedded in the opening of the first end of the dustproof base (2) along the first direction, and the dustproof base (3) is sleeved on the periphery of the second end of the dustproof base (2) along the first direction; The dustproof base (2) is provided with an insert core (5) at the middle position, and a cross beam (205) extending along the second direction is arranged on the two sides of the insert core (5), and the second direction is perpendicular to the first direction; a plurality of louvers (206) are fixedly connected to the cross beam (205), the louvers (206) are arranged at intervals, and the space between the adjacent two louvers (206) forms an arc extinguishing chamber (204); A plurality of dustproof buckles (106) are arranged on the inner side wall of the dustproof cover plate (1) and extend along the first direction; the two side walls of each louver (206) are provided with dustproof grooves (203) extending along the first direction, and the two dustproof grooves (203) between the adjacent two louvers (206) cooperate to form a first guide limiting structure, the number of the first guide limiting structure is consistent with the number of the dustproof buckles (106); each first guide limiting structure is configured to guide and limit the two sides of the dustproof buckle (106) through the two dustproof grooves (203) when the dustproof cover plate (1) is embedded in the dustproof base (2).

2. The dustproof arc extinguishing structure of the electromagnetic contactor according to claim 1, characterized in that, The outer side wall of the dustproof cover plate (1) is provided with two symmetrical auxiliary hanging buckles (102), and the two sides of the dustproof cover plate (1) are respectively fixedly connected with a dustproof terminal post baffle (105), and a plurality of terminal holes (104) are formed in the side walls of the two dustproof terminal post baffles (105).

3. The dustproof arc extinguishing structure of electromagnetic contactor according to claim 2, characterized in that, At least one positioning buckle (103) is arranged on the outer side wall of each dustproof terminal post baffle (105). The inner side wall of the dustproof base (2) is provided with a positioning groove matched with the dustproof base (2).

4. The dustproof arc extinguishing structure of electromagnetic contactor according to claim 1, characterized in that, A plurality of first terminal post mounting holes (101) are arranged on the dustproof cover plate (1), and a plurality of second terminal post mounting holes (201) corresponding to the first terminal post mounting holes (101) are arranged on the dustproof base (2); The number of the first terminal post mounting holes (101) and the second terminal post mounting holes (201) is the same, and each first terminal post mounting hole (101) and the corresponding second terminal post mounting hole (201) are aligned in the first direction.

5. The dustproof arc extinguishing structure of electromagnetic contactor according to claim 1, characterized in that, The number of the arc extinguishing chambers (204) is 8, and two auxiliary mounting holes (202) are arranged on the side walls of the dustproof base (2).

6. The dustproof arc extinguishing structure of electromagnetic contactor according to claim 1, characterized in that, The both side walls of the dustproof base (3) are respectively provided with a thermal relay mounting groove (301) and a surge suppressor mounting groove (305); the dustproof base (3) is provided with a plurality of first auxiliary hanging grooves (303); the side wall of the dustproof base (3) provided with the surge suppressor mounting groove (305) is further provided with two third terminal post mounting holes (306).

7. The dustproof arc extinguishing structure of electromagnetic contactor according to claim 1, characterized in that, The dustproof base (3) is a groove-shaped structure with one end being open, and the open end of the dustproof base (3) is a top end; The top end of the dustproof base (3) is provided with a plurality of connecting buckles (307), and the dustproof base (2) is provided with connecting grooves matched with the connecting buckles (307); The middle part of the bottom end of the dustproof base (3) is provided with a groove (302), and the both side inner walls of the groove (302) are respectively provided with strip-shaped protrusions (3021) extending in a second direction, and a gap is preset between the strip-shaped protrusions (3021) and the groove bottom of the groove (302), and the gap between the strip-shaped protrusions (3021) and the groove bottom of the groove (302) forms a second guiding and limiting structure.

8. The dustproof arc extinguishing structure of electromagnetic contactor according to claim 7, characterized in that, The bottom end of the dustproof base (3) is provided with mounting through holes (304) at four corners, and the hollow part of the dustproof base (3) is mounted with a coil framework (4); The edge part of the top end of the dustproof base (3) is provided with a plurality of dustproof flanges (308), and the dustproof base (2) is provided with dustproof grooves matched with the dustproof flanges (308).

9. The dustproof arc extinguishing structure of electromagnetic contactor according to claim 1, characterized in that, The both side walls of the plug core (5) are respectively provided with a second auxiliary hanging groove (501), and the both side walls of the dustproof base (2) are respectively provided with a hanging hole (207) corresponding to the second auxiliary hanging groove (501); each second auxiliary hanging groove (501) is aligned with the corresponding hanging hole (207); The plug core (5) is provided with a plurality of contact mounting holes (502), and the plug core (5) is further provided with a terminal post type straight static contact bridge (503) and a terminal post type bent static contact bridge (504) side by side; The terminal post type straight static contact bridge (503) is a straight metal sheet, and the terminal post type bent static contact bridge (504) is a metal sheet with one end being bent.

10. An electromagnetic contactor characterized by comprising: The electromagnetic contactor comprises the dustproof arc extinguishing structure of the electromagnetic contactor according to any one of claims 1-9.

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