Coil wiring structure of contactor

Abstract

The utility model provides a coil wiring structure of a contactor, which comprises a coil wiring sheet connected between a coil wiring terminal and a coil winding, the coil wiring sheet comprises a first connecting sheet, a second connecting sheet and a third connecting sheet which are integrally formed, the second connecting sheet is of a planar sheet-shaped structure and is used for being connected with the coil wiring terminal, and the third connecting sheet is of a planar sheet-shaped structure and is used for being connected with the coil wiring terminal. The first connecting sheet and the second connecting sheet are connected in a bending manner and are used for being connected with a coil winding, and the third connecting sheet is connected with the second connecting sheet and is provided with a surge wiring part used for being connected with a surge module. The coil wiring structure of the contactor integrates a plurality of functional structures of fixing and limiting, connecting an external power supply, connecting a coil winding module and connecting a surge module, and can provide a plurality of surge connection structures at the same time, so as to realize different installation modes of a surge protection module, meet the requirements of different application scenes and different customers, and improve the practicability of the contactor. The device has the characteristics of diversified functions and simplified structure.

Description

Technical Field

[0001] The utility model relates to the field of electronic power equipment, in particular to a coil wiring structure of a contactor. Background Art

[0002] Contactors are widely used as power interrupters and control circuits. They use contacts to open and close circuits. The coil connection structure of the contactor is a key component to achieve power supply and coil winding. It usually includes a coil connection piece and a coil winding conductive piece connected to the coil connection piece. With the development of the electronics industry, there are more and more types of contactor coil connection structures.

[0003] At present, the coil connection structure of the conventional contactor in the prior art generally only includes a connection screw structure and a coil winding electrical connection structure, which has the problems of complex wiring and low efficiency. Utility Model Content

[0004] The utility model aims to overcome the technical defects in the prior art and provide a coil connection structure of a contactor with a simple structure and diversified functions.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The present application provides a coil connection structure of a contactor, including a coil connection piece connected between a coil connection terminal and a coil winding, the coil connection piece including a first connection piece, a second connection piece and a third connection piece formed as one piece, the second connection piece is a planar sheet structure for connecting to the coil connection terminal, the first connection piece is bent and connected to the second connection piece for connecting to the coil winding, the third connection piece is connected to the second connection piece, and a surge connection portion for connecting to a surge module is provided.

[0007] The coil connection structure of the contactor provided in the present application connects the external power supply with the contactor coil winding by setting the first connecting piece and the second connecting piece on the coil connection piece, thereby realizing the access of the contactor control power supply, and by setting a surge connection part on the third connecting piece, it can be used to connect the surge module. The coil connection piece in the embodiment of the present application integrates multiple functional structures such as connecting the external power supply, connecting the coil winding module, and connecting the surge module, and has the characteristics of diversified functions, simplified structure, and high assembly efficiency.

[0008] In one feasible manner, the coil terminal includes a wiring screw, a wire pressing plate and a second connecting plate serving as a wiring plate, the second connecting plate being provided with a first hole, the wiring screw passing through the wire pressing plate and connected to the second connecting plate, the wiring screw being used to drive the wire pressing plate to press the wire tightly onto the second connecting plate.

[0009] By using the second connecting piece as the connecting piece of the coil connecting terminal, the structure is simple, the installation is convenient, the material is saved, and the cost is reduced.

[0010] In one feasible manner, the coil terminal includes a frame-type terminal block and a terminal screw, the second connecting piece extends into the frame-type terminal block, the frame-type terminal block is provided with a screw hole, and the terminal screw passes through the frame-type terminal block through the screw hole to press the conductor and the second connecting piece.

[0011] Placing the second connecting piece in the frame-type wiring seat can save time for installing multiple components, save production costs, and improve installation efficiency.

[0012] In one achievable manner, the surface of the second connecting piece is provided with concave and convex portions.

[0013] By providing a concave-convex portion on the surface of the second connecting piece, the friction force on the surface of the second connecting piece can be increased. When using the wiring screws for installation, the friction force of the contact surface between the two can be increased, making the installation more secure. At the same time, the concave-convex portion can also be abutted against multiple positions of the upper cover to achieve longitudinal position fixation of the coil wiring piece.

[0014] In one achievable manner, the third connecting piece includes a plug-in contact portion, and the plug-in contact portion includes a first clamping arm and a second clamping arm, and a clamping gap for clamping the conductor is formed between the first clamping arm and the second clamping arm.

[0015] By arranging the first clamping arm and the second clamping arm on the plug-in contact portion, the surge module can be installed on the coil wiring piece by plug-in.

[0016] In one achievable manner, the first connecting piece extends in a first direction perpendicular to the plane where the second connecting piece is located, and the third connecting piece extends in a second direction opposite to the first direction perpendicular to the plane where the second connecting piece is located.

[0017] In one achievable manner, the first clamping arm and the second clamping arm are respectively bent and connected to the second connecting piece, and the first clamping arm and the second clamping arm are respectively provided with a first protrusion and a second protrusion facing each other on the side surfaces close to the top end, and the distance between the first protrusion and the second protrusion is smaller than the distance between the bottom ends of the first clamping arm and the second clamping arm.

[0018] By respectively arranging the first protrusion and the second protrusion facing each other on the side surfaces of the first clamping arm and the second clamping arm near the top, and at the same time, the distance between the first protrusion and the second protrusion is smaller than the distance between the bottom ends of the first clamping arm and the second clamping arm, a limiting effect is played to prevent the wire from slipping out, thereby improving the clamping effect between the first clamping arm and the second clamping arm.

[0019] In one achievable manner, the facing sides of the first clamping arm and the second clamping arm are respectively the first side surface and the second side surface, the first side surface and the second side surface are inclined surfaces, and the distance between the first side surface and the second side surface gradually decreases from the top end to the bottom end of the first clamping arm and the second clamping arm.

[0020] By respectively setting the first side surface and the second side surface on the sides facing each other of the first clamping arm and the second clamping arm, and setting the first side surface and the second side surface as inclined surfaces, the distance between the two surfaces gradually decreases from the top end to the bottom end of the first clamping arm and the second clamping arm, which is conducive to clamping the connecting conductors of surge protection modules with different diameters.

[0021] In one achievable manner, the third connecting piece includes a welding fixing portion connected to a side edge of the second connecting piece.

[0022] A welding fixing portion is provided on the side of the second connecting piece, which can be used to fix the surge module on the coil connecting piece by welding.

[0023] In one achievable manner, the welding fixing portion is at least one boss structure that protrudes from a side edge of the second connecting piece and extends in a direction parallel to the plane where the second connecting piece is located.

[0024] The welding fixing part may have a variety of different structural features to meet different installation requirements.

[0025] In one achievable manner, the surge connection portion includes a welding fixing portion, and the welding fixing portion is located between the first clamping arm and the second clamping arm.

[0026] In an achievable manner, the second connecting piece is further provided with a limiting portion, and the limiting portion is used to limit the position of the contactor housing.

[0027] By further arranging a limiting portion on the second connecting piece, the coil connecting piece can be limited on the contactor bracket.

[0028] In one achievable manner, one end of the first connecting piece connected to the coil winding is provided with a conductive plug-in end, and the conductive plug-in end of the first connecting piece is plug-fitted with the conductive piece of the coil winding on the coil.

[0029] In one achievable manner, the first connecting piece includes a conductive connecting end and a conductive plug-in end which are connected in sequence, the conductive connecting end is connected to the second connecting piece, and the conductive plug-in end is provided with a plug-in chamfer.

[0030] Providing a plugging chamfer on the conductive plug-in terminal can facilitate the conductive plug-in terminal to be quickly and labor-savingly inserted into the conductive sheet of the coil winding.

[0031] In one achievable manner, the conductive plug end is on an extension line of the conductive connection end, the thickness of the conductive plug end is smaller than the thickness of the conductive connection end, and a first transition portion is provided between the conductive connection end and the conductive plug end.

[0032] In one achievable manner, the conductive plug end includes a connecting portion and an inserting portion, the inserting portion and the conductive connecting end are in parallel structure, and the connecting portion forms an obtuse angle or an acute angle structure with the conductive connecting end and the inserting portion, respectively.

[0033] In one achievable manner, two coil connecting pieces are included, two coil connecting terminals and two ends of the coil winding are connected respectively through the two coil connecting pieces, and two ends of the surge module are respectively connected to the surge connecting parts of the two coil connecting pieces.

[0034] In one achievable manner, the surge module includes a varistor, and two ends of the varistor are respectively connected to surge connection portions of two coil connection pieces.

[0035] Compared with the prior art, the coil connection structure of the contactor proposed in the utility model integrates multiple functional structures such as fixed limit, connection to external power supply, connection to coil winding module, and connection to surge module, and can provide multiple surge connection structures at the same time to realize different installation methods of surge protection modules. It has the characteristics of diversified functions, simplified structure, and high assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of an embodiment of a contactor of the utility model;

[0037] Figure 2 This is a schematic structural diagram of a first embodiment of a coil terminal block of the utility model;

[0038] Figure 3 is a structural schematic diagram of a second embodiment of the second connecting portion and the third connecting portion of the coil terminal piece;

[0039] Figure 4 is a structural schematic diagram of a third embodiment of the second connecting portion and the third connecting portion of the coil terminal piece;

[0040] Figure 5 is a structural schematic diagram of a fourth embodiment of the second connecting portion and the third connecting portion of the coil terminal piece;

[0041] Figure 6 is a structural schematic diagram of a second embodiment of the first connecting portion of the coil terminal piece;

[0042] Figure 7 is a structural schematic diagram of a third embodiment of the first connecting portion of the coil terminal piece;

[0043] Figure 8 It is a top view of an embodiment of the contactor of the utility model;

[0044] In the figure, coil inlet terminal A1; coil outlet terminal A2; coil terminal piece 100; coil winding conductive piece 101; first connecting piece 1; second connecting piece 2; third connecting piece 3; connecting screw 102; wire pressing piece 103; first hole 21; concave-convex portion 222; plug-in contact portion 32; first clamping arm 321; second clamping arm 322; first protruding portion 3211; second protruding portion 3221; first side surface 3212 and second side surface 3222; first side surface 3212; second side surface 3222; welding fixing portion 31; second transition portion 311; protrusion 312; limiting portion 4; conductive connecting end 11; conductive plug-in end 12; plug-in chamfer 13; connecting portion 121; inserting portion 122; "mouth"-shaped structure 104; notch 105. DETAILED DESCRIPTION

[0045] The following embodiments are given in conjunction with the accompanying drawings to further illustrate the specific implementation of the utility model. The protection scope of the utility model is not limited to the description of the following embodiments.

[0046] The contactor includes a contact system and an electromagnetic system. The contact system includes a static contact, a moving contact and a contact support. The moving contact is arranged on the contact support. The electromagnetic system includes a moving iron core and a coil for driving the moving iron core to move. The moving iron core is connected to the contact support to drive the contact support to move linearly up and down, so that the moving contact contacts and the static contact are in contact and separated. Each moving contact is provided with a moving contact at both ends, which contacts or separates with two static contacts arranged at both ends of the contactor. Two contact terminals are provided at both ends of the contactor, which are respectively connected to the two static contact points. A coil terminal electrically connected to the coil of the electromagnetic system is also provided on the contactor. The two contact terminals are respectively used as the input and output terminals for connecting the power supply and the load. The coil terminal is used to connect the control power supply, which is used to power the coil or not power it, thereby driving the moving iron core to drive the contact support to move.

[0047] The contactor of this embodiment is divided into a hierarchical structure, and its main structure is divided into three layers: upper, middle and lower. Among them, the lower structure is provided with an electromagnetic system, the middle structure is provided with a contact system, the contact terminals are arranged at both ends of the middle structure or the upper structure, the coil terminals are arranged at both ends of the middle structure or the upper structure, and a surge module is also provided in the contactor.

[0048] Figure 1The schematic diagram of the structure of the contactor is shown. In this embodiment, the coil of the electromagnetic system is arranged at the lower structure of the contactor, and two coil terminals are arranged at both ends of the upper structure of the contactor. The two coil terminals are coil input terminal A1 and coil output terminal A2, respectively. The two coil terminals are electrically connected to the two ends of the coil winding of the coil, and the surge module is connected between the two coil terminals. The surge module of this embodiment includes a varistor connected between the two coil terminals.

[0049] An improvement of this embodiment lies in the coil connection structure, which includes a coil connection piece 100 connected between the coil connection terminal and the coil winding. The coil is provided with a coil winding conductive piece 101, and the coil connection terminal is connected to the coil winding conductive piece 101 through the coil connection piece 100.

[0050] Figure 2 A coil terminal sheet 100 according to an embodiment of the present application is shown. Figure 2 As shown, the coil terminal piece 100 includes a first connecting piece 1, a second connecting piece 2 and a third connecting piece 3. The first connecting piece 1, the second connecting piece 2 and the third connecting piece 3 are an integrally formed structure, wherein one end of the first connecting piece 1 is connected to the coil winding conductive piece 101 for realizing electrical connection with the coil winding, and the second connecting piece 2 is bent and connected to the other end of the first connecting piece 1, and the second connecting piece 2 is used to connect to an external power supply to provide a secondary control power supply for the contactor; the second connecting piece 2 is connected to the third connecting piece 3, and the third connecting piece 3 is provided with a surge connection portion for connecting to a surge module.

[0051] In this embodiment, by setting the first connecting plate 1, the second connecting plate 2, and the third connecting plate 3 as an integrally formed structure, the functionality of the coil terminal block 100 is greatly increased. The coil terminal block 100 integrates multiple functional structures such as connecting an external control power supply, connecting a coil winding, and connecting a surge module, and is quick and convenient to assemble.

[0052] Figure 1 and Figure 2 A possible implementation is shown, Figure 1 and Figure 2As shown, the coil terminal includes a wiring screw 102, a wire pressing piece 103 and a second connecting piece 2 as a wiring piece. The second connecting piece 2 is bent and connected to the first connecting piece 1. The second connecting piece 2 and the first connecting piece 1 are preferably designed at a right angle, and of course they can be bent and connected at other angles. The second connecting piece 2 is a planar sheet structure with a first hole 21 thereon. The first hole 21 is used to pass the wiring screw 102 through the wire pressing piece 103 to connect with the second connecting piece 2 to achieve electrical connection with an external control power supply, wherein the first hole 21 may have an internal thread inside, and the wiring screw 102 may have an external thread. The coil wiring piece 100 is fixed by matching the internal and external threads. The first hole 21 may also be a structure without internal threads. The wiring screw 102 is matched and connected with the contactor bracket to squeeze and fix the second connecting piece 2.

[0053] In another possible implementation, the coil terminal includes a frame-type terminal block and a terminal screw, the second connecting piece 2 extends into the frame-type terminal block, the frame-type terminal block is provided with a screw hole, and the terminal screw passes through the frame-type terminal block through the screw hole to squeeze and fix the second connecting piece 2 on the contactor bracket.

[0054] Preferably, Figure 2 As shown, a concave-convex portion 222 may be provided on the surface of the second connecting piece 2, which can not only abut against multiple positions of the upper cover through multiple concave-convex portions 222 to achieve longitudinal position fixation of the coil connecting piece 100, but also increase the friction between the connecting screw 102 and the second connecting piece 2 by providing the concave-convex portion 222, so as to achieve a firm fixation effect between the coil connecting piece 100 and the contactor body. The concave-convex portion 222 may be in various shapes, such as a convex point shape, a line shape, etc.

[0055] One end of the second connection piece 2 is connected to the third connection piece 3, and the third connection piece 3 includes a plug-in contact portion 32, and the plug-in contact portion 32 includes a first clamping arm 321 and a second clamping arm 322, and the first clamping arm 321 and the second clamping arm 322 are arranged in parallel, and a clamping gap for clamping the conductor is formed therebetween, and the plug-in contact portion 32 is used to install the surge module on the coil wiring piece 100 by plugging. In practical applications, the third connection piece 3 can have a variety of different structural features to achieve different installation methods of the surge module.

[0056] The first connecting piece 1 extends in a first direction perpendicular to the plane where the second connecting piece 2 is located, and the third connecting piece 3 extends in a second direction opposite to the first direction perpendicular to the plane where the second connecting piece 2 is located.

[0057] Figure 2 A preferred embodiment of the plug-in contact portion 32 of the present application is shown. Figure 2As shown, the first clamping arm 321 and the second clamping arm 322 are respectively connected to the second connecting piece 2 at a certain angle, preferably at a right angle. The first clamping arm 321 and the second clamping arm 322 are respectively provided with a first protrusion 3211 and a second protrusion 3221 on the side surfaces near the top end. The first protrusion 3211 and the second protrusion 3221 can be arc-shaped and have a symmetrical structure. The distance between the first protrusion 3211 and the second protrusion 3221 is smaller than the distance between the bottom ends of the first clamping arm 321 and the second clamping arm 322. This design can play a role in limiting and electrical connection, and an external metal part or a conductive material can be inserted between the gap between the first clamping arm 321 and the second clamping arm 322 to prevent the wire from slipping out.

[0058] The sides facing each other of the first clamping arm 321 and the second clamping arm 322 are respectively the first side surface 3212 and the second side surface 3222. The first side surface 3212 and the second side surface 3222 are inclined surfaces, and the distance between the first side surface 3212 and the second side surface 3222 gradually decreases from the top to the bottom of the first clamping arm 321 and the second clamping arm 322. This design is conducive to clamping the connection conductors of the surge protection module with different diameters.

[0059] Figure 5 Another preferred embodiment of the plug-in contact portion 32 of the present application is shown. Figure 5 As shown, the first clamping arm 321 and the second clamping arm 322 are two columnar structures perpendicular to the second connecting piece 2, and a clamping gap for clamping the conductor is formed between the first clamping arm 321 and the second clamping arm 322. This design can limit the circuit board of the surge protection module, and a corresponding elastic member can be set on the circuit board for electrical connection and fixation. The third connecting piece 3 also includes a welding fixing portion 31 connected to the side of the second connecting piece 2, which is used to fix the surge module on the coil terminal piece 100 by welding. The welding fixing portion 31 can be at least one boss structure protruding from the side of the second connecting piece 2 and extending in a direction parallel to the plane where the second connecting piece 2 is located; or, at least one boss structure extending from the plane where the second connecting piece 2 is located; or, the welding fixing portion 31 is at least one boss structure extending in a direction parallel to the plane where the second connecting piece 2 is located on the opposite side of the central area of ​​the plug-in contact portion 32. Anything that can achieve similar or similar effects belongs to the scope of protection of the utility model.

[0060] Furthermore, Figure 2 A preferred embodiment of the welding fixing portion 31 is shown. Figure 2 As shown, the welding fixing portion 31 is located in the middle of the plug-in contact portion 32 , which is an extension of the second connecting piece 2 in the horizontal direction, and is at the same height level as the second connecting piece 2 .

[0061] Furthermore, Figure 3 A preferred embodiment of the welding fixing portion 31 is shown. Figure 3 As shown, the welding fixing portion 31 is located in the middle of the plug-in contact portion 32, is higher than the second connecting piece 2 in the horizontal direction and is parallel to the second connecting piece 2, and a second transition portion 311 is provided between the welding fixing portion 31 and the second connecting piece 2, and the second transition portion 311 may be arc-shaped.

[0062] Furthermore, Figure 4 A preferred embodiment of the welding fixing portion 31 is shown. Figure 4 As shown, the welding fixing portion 31 is located at one side of the plug-in contact portion 32 , and is an extension of the second connecting piece 2 in the horizontal direction, and is at the same height level as the second connecting piece 2 .

[0063] Furthermore, Figure 5 A preferred embodiment of the welding fixing portion 31 is shown. Figure 5 As shown, the welding fixing portion 31 is on the opposite side of the central area of ​​the plug-in contact portion 32 , the height of the welding fixing portion 31 is higher than the height of the second connecting piece 2 in the horizontal direction, and the welding fixing portion 31 is parallel to the second connecting piece 2 .

[0064] Preferably, there is a certain gap between the bottom ends of the first clamping arm 321 and the second clamping arm 322. When the surge module is welded to the welding fixing portion 31, the gap can limit the surge module to facilitate welding and positioning of the surge module.

[0065] like Figure 2-Figure 5 As shown, the side of the second connecting piece 2 is also provided with a limiting part 4, which is a concave-convex structure, and can be composed of a plurality of grooves, which cooperate with the corresponding convex structure on the upper cover to limit the coil connecting piece 100 on the contactor housing. Among them, the limiting part 4 can also be composed of a plurality of bosses, and the structural feature on the upper cover that cooperates with it can be a groove. As long as the two can cooperate and lock to achieve the position limitation and fixation of the coil connecting piece 100, it is within the protection scope of the present utility model.

[0066] Figure 2 The schematic diagram of the structure of the first connecting sheet 1 in the embodiment of the present application is shown as follows: Figure 2As shown, the first connecting piece 1 is a long plate-like structure, including a conductive connecting end 11 and a conductive plug-in end 12, one end of the conductive connecting end 11 is connected to the second connecting piece 2, and the other end of the conductive connecting end 11 is connected to the conductive plug-in end 12, and the conductive plug-in end 12 is connected to the coil winding, and is plugged and installed with the coil winding conductive sheet 101, wherein the installation method can be but is not limited to plug-in connection, for example, it can also be connected by screws. Among them, the conductive plug-in end 12 is also provided with a plug-in chamfer 13, and the plug-in chamfer 13 is a blade-like structure, which can facilitate the conductive plug-in end 12 to be inserted into the coil winding conductive sheet 101, and has the characteristics of convenience and labor saving. In addition, it should be noted that in some cases, the conductive plug-in end 12 and the coil winding conductive sheet 101 can also be a non-detachable integrated structure, which all belongs to the protection scope of the present utility model.

[0067] Figure 2 A preferred embodiment of the conductive plug terminal 12 is shown. The conductive plug terminal 12 is on the extension line of the conductive connection terminal 11 , and the thickness of the conductive plug terminal 12 is less than the thickness of the conductive connection terminal 11 . A first transition portion 111 exists between the conductive connection terminal 11 and the conductive plug terminal 12 .

[0068] Furthermore, Figure 6 A preferred embodiment of the conductive plug terminal 12 is shown. Figure 6 As shown, the conductive plug-in end 12 has the same size and thickness as the conductive connecting end 11 and is an extension of the conductive connecting end 11 .

[0069] Furthermore, Figure 7 A preferred embodiment of the conductive plug terminal 12 is shown. Figure 7 As shown, the conductive plug terminal 12 includes a connecting portion 121 and an inserting portion 122. The connecting portion 121, the inserting portion 122 and the conductive connecting terminal 11 have the same thickness, and the inserting portion 122 and the conductive connecting terminal 11 are parallel structures, wherein the connecting portion 121 is a shape in which the conductive connecting terminal 1 and the inserting portion 122 are bent on a straight line, and the connecting portion 121 is at an obtuse angle or an acute angle with the conductive connecting terminal 1 and the inserting portion 122 respectively.

[0070] In the actual production process, the above different solutions or combination of solutions can be selected according to the differentiated structures such as the thickness of the thin plate, the length of the first connecting sheet 1 and the structure and position of the coil winding conductive sheet 101.

[0071] In the embodiment of the present application, the coil connection structure of the contactor includes two coil connection pieces 100, and the two coil connection terminals and the two ends of the coil winding are respectively connected through the two coil connection pieces 100, which are used to conduct the external power supply with the coil winding inside the contactor to realize the input and output of the power supply; the surge connection parts of the two coil connection pieces 100 are respectively connected to the two ends of the surge module to realize the surge protection of the contactor control circuit, wherein the surge module can be but not limited to a varistor, for example, it can also be a diode and other electronic components.

[0072] Figure 8 This is a schematic diagram of a section of the upper cover after the coil connection piece 100 of the embodiment of the present application is installed. Figure 8 As shown, the coil inlet terminal A1 and the coil outlet terminal A2 of the upper cover coil have a "mouth" shaped structure 104, the first connecting piece 1 is inserted into the "mouth" shaped structure 104, and the "mouth" shaped structure 104 has a notch 105 to facilitate the plug-in connection of the surge module. Multiple crimping surfaces of the upper cover are in contact with the upper surface of the second connecting piece 2 to limit the longitudinal direction of the coil connecting piece 100.

[0073] Compared with the prior art, the coil connection structure of the contactor of the present application integrates multiple functional structures such as fixed limit, connection to external power supply, connection to coil winding module, and connection to surge module, and can provide two surge connection structures at the same time to realize different installation methods of surge protection modules, meet the needs of different application scenarios and different customers, and has the characteristics of diversified functions and simplified structure.

[0074] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0075] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A coil connection structure of a contactor, characterized in that: The invention comprises a coil connection piece (100) connected between a coil connection terminal and a coil winding, wherein the coil connection piece (100) comprises a first connection piece (1), a second connection piece (2) and a third connection piece (3) which are integrally formed, wherein the second connection piece (2) is a planar sheet structure and is used to be connected to the coil connection terminal, the first connection piece (1) is bent and connected to the second connection piece (2) and is used to be connected to the coil winding, the third connection piece (3) is connected to the second connection piece (2), and is provided with a surge connection portion for being connected to a surge module.

2. The coil connection structure of the contactor according to claim 1, characterized in that: The coil terminal comprises a connection screw (102), a wire pressing piece (103) and a second connecting piece (2) serving as a connection piece, wherein the second connecting piece (2) is provided with a first hole (21), the connection screw (102) passes through the wire pressing piece (103) and is connected to the second connecting piece (2), and the connection screw (102) is used to drive the wire pressing piece (103) to press the wire tightly onto the second connecting piece (2).

3. The coil connection structure of the contactor according to claim 1, characterized in that: The coil terminal comprises a frame-type terminal block and a terminal screw (102); the second connecting piece (2) extends into the frame-type terminal block; a screw hole is provided on the frame-type terminal block; the terminal screw (102) passes through the screw hole through the frame-type terminal block to press the conductor and the second connecting piece (2) together.

4. The coil connection structure of the contactor according to claim 2 or 3, characterized in that: The surface of the second connecting piece (2) is provided with a concave-convex portion (222).

5. The coil connection structure of the contactor according to claim 1, characterized in that: The third connecting piece (3) comprises a plug-in contact portion (32), and the plug-in contact portion (32) comprises a first clamping arm (321) and a second clamping arm (322), wherein a clamping gap for clamping a conductor is formed between the first clamping arm (321) and the second clamping arm (322).

6. The coil connection structure of the contactor according to claim 5, characterized in that: The first connecting piece (1) extends in a first direction perpendicular to the plane where the second connecting piece (2) is located, and the third connecting piece (3) extends in a second direction opposite to the first direction perpendicular to the plane where the second connecting piece (2) is located.

7. The coil connection structure of the contactor according to claim 5, characterized in that: The first clamping arm (321) and the second clamping arm (322) are respectively connected to the second connecting piece (2) by bending, and the first clamping arm (321) and the second clamping arm (322) are respectively provided with a first protrusion (3211) and a second protrusion (3221) facing each other on the side surfaces close to the top end, and the distance between the first protrusion (3211) and the second protrusion (3221) is smaller than the distance between the bottom ends of the first clamping arm (321) and the second clamping arm (322).

8. The coil connection structure of the contactor according to claim 7, characterized in that: The side surfaces of the first clamping arm (321) and the second clamping arm (322) facing each other are respectively the first side surface (3212) and the second side surface (3222); the first side surface (3212) and the second side surface (3222) are inclined surfaces; and the distance between the first side surface (3212) and the second side surface (3222) gradually decreases from the top end to the bottom end of the first clamping arm (321) and the second clamping arm (322).

9. The coil connection structure of the contactor according to claim 1 or 5, characterized in that: The third connecting piece (3) comprises a welding fixing portion (31) connected to the side edge of the second connecting piece (2).

10. The coil connection structure of the contactor according to claim 9, characterized in that: The welding fixing portion (31) is at least one boss structure that protrudes from the side of the second connecting piece (2) and extends in a direction parallel to the plane where the second connecting piece (2) is located.

11. The coil connection structure of the contactor according to any one of claims 5 to 8, characterized in that: The surge connection portion comprises a welding fixing portion (31), and the welding fixing portion (31) is located between the first clamping arm (321) and the second clamping arm (322).

12. The coil connection structure of the contactor according to claim 1, characterized in that: The second connecting piece (2) is also provided with a limiting portion (4), and the limiting portion (4) is used for limiting the position with the housing of the contactor.

13. The coil connection structure of the contactor according to claim 1, characterized in that: One end of the first connecting piece (1) connected to the coil winding is provided with a conductive plug-in end (12), and the conductive plug-in end (12) of the first connecting piece (1) is plug-fitted with the coil winding conductive piece (101) on the coil.

14. The coil connection structure of the contactor according to claim 13, characterized in that: The first connecting piece (1) comprises a conductive connecting end (11) and a conductive plug-in end (12) which are connected in sequence, the conductive connecting end (11) is connected to the second connecting piece (2), and the conductive plug-in end (12) is provided with a plug-in chamfer (13).

15. The coil connection structure of the contactor according to claim 14, characterized in that: The conductive plug end (12) is on the extension line of the conductive connection end (11), the thickness of the conductive plug end (12) is smaller than the thickness of the conductive connection end (11), and a first transition portion (111) is provided between the conductive connection end (11) and the conductive plug end (12).

16. The coil connection structure of the contactor according to claim 14, characterized in that: The conductive plug-in terminal (12) comprises a connecting portion (121) and an inserting portion (122); the inserting portion (122) and the conductive connecting terminal (11) are in a parallel structure; the connecting portion (121) forms an obtuse angle or an acute angle structure with the conductive connecting terminal (11) and the inserting portion (122), respectively.

17. The coil connection structure of the contactor according to claim 14, characterized in that: It comprises two coil connection pieces (100), two coil connection terminals and two ends of the coil winding are respectively connected via the two coil connection pieces (100), and two ends of the surge module are respectively connected to the surge connection parts of the two coil connection pieces (100).

18. The coil connection structure of the contactor according to claim 17, characterized in that: The surge module comprises a varistor, and two ends of the varistor are respectively connected to the surge connection parts of two coil connection pieces (100).

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