Arc isolation structure and contactor

Abstract

The arc isolation structure comprises a shell and an arc isolation plate installed on the shell, the arc isolation plate is provided with a limiting column and an assembling groove, an elastic structure is arranged in the assembling groove, a clamping jaw is arranged on the elastic structure, and the two opposite sides of the clamping jaw are provided with a limiting face and a transition face respectively. The shell is provided with a limiting groove and an assembling block corresponding to the limiting column and the assembling groove respectively, the two opposite ends of the limiting groove are provided with an inserting opening and a limiting block respectively, and the assembling block of the shell is sleeved with the assembling groove while the limiting column is inserted into the limiting groove from the inserting opening. When the limiting column slides from the position corresponding to the inserting opening to the position provided with the limiting block, the assembling block pushes the transition face, the elastic structure is bent and drives the clamping jaw to be away from the assembling block, and when the limiting column slides to the position corresponding to the limiting block for limiting, the assembling block moves to the side, provided with the limiting face, of the clamping jaw, so that the limiting face is matched with the assembling block in a limiting mode. The mounting structure has the characteristic of convenience in assembly, and the arc barrier can be more reliably mounted on the shell.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to an arc isolation structure and a contactor. Background Art

[0002] AC contactors are used to control the circuits. They are connected to the circuits through terminals and the adjacent terminals are isolated through arc-isolating plates to prevent the arc or arc light generated when the contactor is disconnected from spreading and causing phase-to-phase short circuits, thereby effectively preventing equipment damage, fire risks, power outages, etc. However, the existing arc-isolating plates are hard, which makes it inconvenient for customers to connect the wires during operation. In addition, the arc-isolating plates are inconvenient to install, unreliable to install, and easy to fall off. Summary of the invention

[0003] The purpose of the utility model is to overcome at least one defect of the prior art and provide an arc isolation structure.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An arc isolation structure comprises a shell and an arc isolation plate mounted on the shell, the arc isolation plate is provided with a limit column and an assembly groove, an elastic structure is provided in the assembly groove, a clamping claw is provided on the elastic structure, and limit surfaces and transition surfaces are respectively provided on opposite sides of the clamping claw, the shell is provided with a limit groove and an assembly block corresponding to the limit column and the assembly groove, a socket and a limit block are respectively provided at opposite ends of the limit groove, the socket is used for the limit column to be installed into the limit groove and moved out of the limit groove, and when the limit column slides to a position in the limit groove where the limit block is provided, the limit block restricts the limit column from moving out of the limit groove;

[0006] The limit post is inserted into the limit groove from the socket, and the assembly groove is sleeved on the assembly block of the shell, and the assembly block is located on the side of the claw with the transition surface; the limit post slides from the position corresponding to the socket to the position with the limit block, and the assembly block pushes the transition surface, so that the elastic structure bends and drives the claw away from the assembly block. When the limit post slides to the limit position corresponding to the limit block, the assembly block moves to the side of the claw with the limit surface, so that the limit surface and the assembly block are limited and matched.

[0007] Preferably, the elastic structure comprises a spring sheet, and a supporting structure and the clamping claw are respectively provided on two opposite sides of the spring sheet, and the supporting structure is used to support the spring sheet so that the clamping claw can be reliably limited with the assembly block.

[0008] Preferably, the support structure includes a support plate arranged on the side of the spring sheet away from the clamping claw, and the two ends of the support plate are respectively connected to the two side walls opposite to the assembly groove. A support platform is provided between the support plate and the spring sheet, and the support platform is connected between the spring sheet and the support plate. The support platform and the assembly groove are connected to the two side walls at both ends of the support plate and are respectively spaced apart.

[0009] Preferably, the middle portion of the support plate protrudes toward the spring sheet to form an arc-shaped support surface, and the support platform is connected between the spring sheet and the support surface.

[0010] Preferably, a support sheet is provided on a side of the support plate away from the spring sheet, the support sheet is connected between the support plate and the bottom of the assembly groove, and the thickness of the support sheet is smaller than the thickness of the arc isolation plate.

[0011] Preferably, two reinforcing plates are provided, the spring sheet is connected to one of the reinforcing plates, and the other reinforcing plate is provided with a clamping surface arranged opposite to the upper limit surface of the claw, and the clamping surface and the limiting surface are used to limit the assembly block from opposite sides respectively.

[0012] Preferably, the spring piece is in the shape of a flat plate, and the spring piece and the arc isolation plate are arranged perpendicularly.

[0013] Preferably, the limiting column includes a limiting portion and a connecting portion, the length direction of the limiting portion is arranged parallel to the length direction of the arc isolation plate, the limiting portion protrusion is arranged on one side of the width direction of the arc isolation plate, the connecting portion is arranged between the limiting portion and the arc isolation plate, and is used to connect the limiting portion and the arc isolation plate, the limiting portion is inserted into the limiting groove along the width direction of the arc isolation plate, and slides toward the limiting block along the length direction of the arc isolation plate.

[0014] Preferably, two opposite side walls of the limit groove are respectively provided with limit blocks, the two limit blocks are arranged opposite to each other, and a connecting groove for inserting the connecting part is provided between the two limit blocks. When the limit part slides toward the limit block along the length direction of the arc isolation plate, it drives the connecting part to be inserted into the connecting groove. When the limit column slides to the position limited by the limit block, the limit part is inserted between the two limit blocks and the bottom of the limit groove.

[0015] Preferably, the limiting portion is cylindrical, and the axis of the limiting portion is arranged parallel to the length direction of the arc isolation plate.

[0016] Preferably, the limiting portion includes an introduction portion, a transition portion and an interference portion which are sequentially arranged along the length direction of the arc isolation plate, the interference portion slides and interferes with the limiting groove, the diameter of the introduction portion is smaller than the interference portion, the diameter of the transition portion is between the introduction portion and the interference portion, and the diameter of the transition portion changes along the length direction of the arc isolation plate, so that the circumferential surface of the transition portion gradually shrinks in a direction close to the introduction portion, and forms a transition surface which is arranged at an oblique angle to the length direction of the arc isolation plate.

[0017] Preferably, the limiting portion is provided with lead-in surfaces at opposite ends along the length direction of the arc isolation plate, the lead-in surfaces are arranged on the side of the limiting portion away from the arc isolation plate, and respectively cooperate with the sockets of the limiting groove, and the lead-in surfaces are arranged at an oblique angle to the width direction of the arc isolation plate.

[0018] Preferably, the interference portion is provided with a cutout on a side away from the arc isolation plate, and the introduction portion is provided with a chamfer.

[0019] Preferably, a second limiting column is provided on the side of the arc isolation plate, and the shell is provided with a limiting boss protruding toward the side of the arc isolation plate, the top of the limiting boss is flush with the limiting block, and the limiting boss is provided with a second limiting groove on the side facing the arc isolation plate, and the second limiting column is used to be inserted into the second limiting groove.

[0020] Preferably, the arc isolation plate is made of rubber material, and the elastic structure and the arc isolation plate are an integrated structure.

[0021] Preferably, at least two of the limiting columns are provided, and at least two limiting columns are arranged along the length direction of the arc isolation plate.

[0022] Preferably, a reinforcing plate is provided on the side of the arc isolation plate close to the shell, and the reinforcing plate is arranged perpendicular to the arc isolation plate.

[0023] Preferably, a plurality of reinforcing ribs are respectively provided on the opposite side surfaces of the arc isolation plate, the plurality of reinforcing ribs are arranged in parallel, and the plurality of reinforcing ribs are arranged perpendicular to the reinforcing plate.

[0024] Preferably, the arc isolation plate is provided with a tearing groove, and a detachable tearing plate is formed on the side of the tearing groove away from the shell.

[0025] Preferably, two opposite sides of the arc isolation plate are respectively provided with tearing grooves, the cross section of the connection between the tearing plate and the tearing groove is an isosceles trapezoid, and one end of the tearing grooves on both sides are connected to form a tearing opening.

[0026] Preferably, an L-shaped installation mark is provided on the side of the arc isolation plate, and the installation mark includes a turning arrow composed of two side edges, and the two side edges are respectively arranged parallel to the width direction and the length direction of the arc isolation plate.

[0027] Preferably, the arc isolation plate is provided with a spare groove in the middle, a spare structure is provided in the spare groove, and the spare structure is the same as the supporting structure.

[0028] Preferably, two of the limiting columns and one elastic structure are provided, and the elastic structure is provided between the two limiting columns.

[0029] Preferably, the direction in which the limiting column is installed into the socket is a first direction, and the direction in which the limiting column slides from a position corresponding to the socket to a position where the limiting block is provided is a second direction, and the first direction is perpendicular to the second direction.

[0030] A contactor comprises an electromagnetic system, a contact system and an arc-isolating structure, wherein the electromagnetic system and the contact system are respectively arranged in a shell of the arc-isolating structure, the contact system is provided with at least two phase poles, and the at least two phase poles each comprise a moving contact and static contacts respectively arranged at both ends of the corresponding moving contact, two wiring terminals are respectively arranged corresponding to the at least two phase poles, and the two wiring terminals corresponding to each phase pole are relatively arranged on both sides of the shell, the arc-isolating plate is located between two adjacent wiring terminals on the same side of the shell, and the two static contacts of each phase pole are respectively connected to the circuit through the wiring terminals, and the electromagnetic system is used to drive the moving contact to move, so that the moving contact contacts and separates with the corresponding two static contacts, thereby switching on and off the circuit connected to the static contact.

[0031] The arc isolation structure of the present embodiment is provided with an elastic structure in the assembly groove of the arc isolation plate, and a claw is provided on the elastic structure. In the process that the arc isolation plate slides the limit column from the socket to the limit position with the limit block, the elasticity of the elastic structure can be utilized to make the claw on the elastic structure avoid the assembly block. When the limit column is installed in place, the claw limits the assembly block through the limit surface. There is no need to assemble the limit column and the claw separately, and no need for connection methods such as screws. It has the characteristics of easy assembly. By limiting the limit column and the claw separately, the arc isolation can be more reliably installed on the shell.

[0032] In addition, the arc isolation plate is made of soft rubber material, and the elastic structure and the arc isolation plate are an integrated structure. The soft rubber material not only has good insulation properties, but also has certain elasticity. On the basis of meeting the bending function of the elastic structure, it can also bend appropriately when the customer is wiring, which is convenient for the customer to perform wiring operations.

[0033] In addition, the tear plate can be torn off or cut off along the tear groove to adjust the width of the arc isolation plate. In actual use, the width of the arc isolation plate can be adjusted according to the situation, which is very convenient to use.

[0034] The contactor of this embodiment, by providing the arc isolation plate, can isolate the arc between the wiring terminals of two adjacent phase poles through the arc isolation plate, which not only improves safety but also has the characteristics of easy assembly and wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of the contactor of the utility model;

[0036] Figure 2 It is a schematic diagram of the assembly of the arc isolation structure of the utility model;

[0037] Figure 3 It is a schematic diagram of the structure of the utility model in which the limiting column is inserted into the limiting groove;

[0038] Figure 4It is a cross-sectional view of the limit column of the utility model inserted into the limit groove;

[0039] Figure 5 It is a structural schematic diagram of the arc isolation plate of the utility model;

[0040] Figure 6 It is a structural schematic diagram of the limit column of the utility model;

[0041] Figure 7 It is a structural schematic diagram of the elastic structure of the utility model;

[0042] Figure 8 It is a cross-sectional schematic diagram of the cooperation between the elastic structure and the assembly block of the utility model;

[0043] Fig. 9 This utility model Figure 7 BB cross-section diagram;

[0044] Fig.10 This utility model Figure 5 A magnified view of part C;

[0045] Fig.11 is a cross-sectional view of the tear plate of the utility model;

[0046] In the figure, the shell 1; the arc isolation plate 2; the limiting column 3; the assembly groove 4; the elastic structure 5; the claw 51; the limiting surface 511; the transition surface 512; the limiting groove 11; the assembly block 12; the socket 111; the limiting block 112; the connecting groove 113; the terminal 6; the limiting part 31; the connecting part 32; the introduction part 311; the transition part 312; the interference part 313; the cutout 314; the chamfer 315; the second limiting column 7; the limiting boss 71; the second limiting groove 72; the spring piece 52; the supporting structure 53; the supporting plate 531; the supporting surface 532; the supporting platform 533; the avoidance groove 534; the supporting sheet 535; the spare structure 8; the spare groove 80; the reinforcing plate 21; the pressing surface 22; the reinforcing rib 23; the tearing groove 24; the tearing plate 25; the tearing hole 26; and the installation mark 27. DETAILED DESCRIPTION

[0047] The specific implementation of the arc isolation structure of the present utility model is further described below in conjunction with the embodiments given in the accompanying drawings. The arc isolation structure of the present utility model is not limited to the description of the following embodiments.

[0048] like Figure 1As shown, the contactor of this embodiment includes an electromagnetic system (not shown in the figure), a contact system (not shown in the figure), and an arc isolation structure. The electromagnetic system and the contact system are respectively arranged in the housing 1. The contact system is provided with at least two phase poles, and at least two phase poles include a moving contact and static contacts respectively arranged at both ends of the corresponding moving contact. Two connecting terminals 6 are respectively provided corresponding to the at least two phase poles, and the two connecting terminals 6 corresponding to each phase pole are relatively arranged on both sides of the housing 1. The arc isolation structure includes an arc isolation plate 2, and the arc isolation plate 2 is located between two adjacent connecting terminals 6 on the same side of the housing 1, and is used to separate two adjacent connecting terminals 6. The two static contacts of each phase pole are respectively connected to the circuit through the connecting terminals 6. The electromagnetic system is used to drive the moving contact to move, so that the moving contact contacts and separates from the corresponding two static contacts, thereby connecting and disconnecting the circuit connected to the static contact.

[0049] This embodiment is a three-pole contactor with three phase poles. Three wiring terminals 6 and two arc isolation plates 2 are provided on each side of the housing 1 . The two arc isolation plates 2 on each side of the housing 1 are arranged in parallel to isolate the three wiring terminals 6 .

[0050] like Figure 1-5As shown, the arc isolation structure of this embodiment includes an arc isolation plate 2 installed on a shell 1, the arc isolation plate 2 is provided with a limiting column 3 and an assembly groove 4, an elastic structure 5 is provided in the assembly groove 4, a clamping claw 51 is provided on the elastic structure 5, and the clamping claw 51 is provided with a limiting surface 511 and a transition surface 512 on opposite sides thereof, the shell 1 is provided with a limiting groove 11 and an assembly block 12 corresponding to the limiting column 3 and the assembly groove 4, the limiting column 3 is inserted into the limiting groove 11 for limiting, and the assembly block 12 is assembled into the assembly groove 4 to cooperate with the clamping claw 51 for limiting. The two opposite ends of the limit groove 11 are respectively provided with a socket 111 and a limit block 112. The socket 111 is used for the limit column 3 to be inserted into the limit groove 11 and removed from the limit groove 11. When the limit column 3 slides to the position where the limit block 112 is provided in the limit groove 11, the limit block 112 restricts the limit column 3 from being removed from the limit groove 11. The limit column 3 can only be removed from the limit groove 11 when it slides in the reverse direction to the position corresponding to the socket 111. The assembly block 12 is accommodated in the assembly In the groove 4, when the limit column 3 moves from the position corresponding to the socket 111 to the position where the limit block 112 is provided, the assembly block 12 pushes the transition surface 512 to bend the elastic structure 5 and drive the claw 51 away from the assembly block 12, so that the assembly block 12 moves to the side where the limit surface 511 is provided on the claw 51, so that the assembly block 12 and the claw 51 limit the limit column 3 from sliding in the opposite direction from the position corresponding to the limit block 112 to the position corresponding to the socket 111. The specific process is that the limiting column 3 is inserted into the limiting groove 11 from the socket 111, and the assembly groove 4 is sleeved on the assembly block 12 of the shell 1, and the assembly block 12 is located on the side of the claw 51 with the transition surface 512. When the limiting column 3 slides from the position corresponding to the socket 111 to the position with the limiting block 112, the assembly block 12 pushes the transition surface 512, so that the elastic structure 5 bends and drives the claw 51 away from the assembly block 12. When the limiting column 3 slides to the position corresponding to the limiting block 112 in the limiting groove 11, the assembly block 12 moves to the side of the claw 51 with the limiting surface 511, so that the limiting surface 511 cooperates with the assembly block 12 to limit the limiting column 3 from sliding toward the socket 111.

[0051] The arc isolation structure of the present embodiment is provided with an elastic structure 5 in the assembly groove 4 of the arc isolation plate 2, and a claw 51 is provided on the elastic structure 5. In the process that the arc isolation plate 2 slides the limiting column 3 from the socket 111 to the limiting block 112, the elasticity of the elastic structure 5 can be utilized to make the claw 51 on the elastic structure 5 avoid the assembly block 12. When the limiting column 3 is installed in place, the claw 51 limits the assembly block 12 through the limiting surface 511. There is no need to assemble the limiting column 3 and the claw 51 separately, and no connection method such as screws is required. It has the characteristics of easy assembly. By limiting the limiting column 3 and the claw 51 separately, the arc isolation can be more reliably installed on the shell 1.

[0052] Preferably, the arc isolation plate 2 of this embodiment is made of soft rubber material, and the elastic structure 5 and the arc isolation plate 2 are an integrated structure. The soft rubber material not only has good insulation properties, but also has certain elasticity. On the basis of satisfying the bending function of the elastic structure 5, it can also bend appropriately when the customer is wiring, which is convenient for the customer to perform wiring operations.

[0053] Preferably, the direction in which the limiting column 3 is inserted into the socket 111 is the first direction, and the direction in which the limiting column 3 slides from the position corresponding to the socket 111 to the position provided with the limiting block 112 is the second direction, and the first direction is perpendicular to the second direction; the advantage of this is that it is not necessary to remove the cover plate of the housing 1 when disassembling the arc isolation plate 2. In the prior art, the housing 1 usually includes a base and a cover plate, and the top of the base is used as the socket 111. The limiting column 3 is usually inserted from the top of the limiting groove 11, and then the cover plate seals the top of the limiting groove 11. This structure requires the removal of the cover plate of the housing 1 when installing and removing the arc isolation plate 2, and is easy to assemble. The structure of this embodiment does not require the removal of the cover plate of the housing 1, and the limiting structure is also reliable.

[0054] The contactor of this embodiment, by providing the arc isolation plate 2, can isolate the arc between the connection terminals 6 of two adjacent phase poles through the arc isolation plate 2, which not only improves safety but also has the characteristics of easy assembly and wiring.

[0055] like Figure 5-6 As shown, the limiting column 3 includes a limiting portion 31 and a connecting portion 32. The limiting portion 31 is cylindrical. The length direction of the limiting portion 31 is arranged parallel to the length direction of the arc isolation plate 2. The limiting portion 31 is convexly arranged on one side of the width direction of the arc isolation plate 2. The connecting portion 32 is arranged between the limiting portion 31 and the arc isolation plate 2, and is used to connect the limiting portion 31 and the arc isolation plate 2. The two opposite side walls of the limiting groove 11 are respectively provided with limiting blocks 112. The two limiting blocks 112 are arranged opposite to each other. A connecting groove 113 for inserting the connecting portion 32 is provided between the two limiting blocks 112. After the limiting column 3 is aligned with the socket 111 of the limiting groove 11, the arc isolation plate 2 is pushed to move in the width direction so that the limiting column 3 is inserted into the limiting groove 11, and then the arc isolation plate 2 is pushed to move in the length direction so that the connecting portion 32 is inserted into the connecting groove 113, and at the same time, the limiting portion 31 is inserted between the two limiting blocks 112 and the bottom of the limiting groove 11, so that the limiting column 3 is limited by the two limiting blocks 112 at the bottom of the limiting groove 11. Of course, the limiting column 3 can also adopt other shapes, such as dovetail shape, L shape or other shapes, which all belong to the protection scope of the utility model.

[0056] Further, the limiting portion 31 is cylindrical, and the axis of the limiting portion 31 is arranged parallel to the length direction of the arc isolation plate 2. The limiting portion 31 includes an introduction portion 311, a transition portion 312 and an interference portion 313 which are arranged in sequence along the length direction of the arc isolation plate 2. The interference portion 313 slides and interferes with the limiting groove 11. The diameter of the introduction portion 311 is smaller than the interference portion 313, so that the introduction portion 311 can be easily inserted into the bottom of the limiting groove 11. The diameter of the transition portion 312 is between the introduction portion 311 and the interference portion 313, and the diameter of the transition portion 312 changes along the length direction of the arc isolation plate 2, so that the circumferential surface of the transition portion 312 gradually shrinks in the direction close to the introduction portion 311, and forms a transition surface 512 which is arranged at an oblique angle to the length direction of the arc isolation plate 2, which can reduce the interference portion 313 from sliding to a position where it interferes with the limiting groove 11 and the limiting block 112.

[0057] Furthermore, the limiting portion 31 is provided with guide surfaces at two opposite ends along the length direction of the arc isolation plate 2, and the guide surfaces are arranged on the side of the limiting portion 31 away from the arc isolation plate 2, and respectively cooperate with the sockets 111 of the limiting groove 11, and the guide surfaces are arranged at an oblique angle to the width direction of the arc isolation plate 2, that is, they are arranged at an oblique angle to the direction in which the limiting column 3 is inserted into the socket 111 of the limiting groove 11. The inclined guide surface can play a guiding role. When the limiting column 3 is not completely aligned with the socket 111, the limiting column 3 can be driven to slide to the correct position through the guide surface.

[0058] In this embodiment, the interference portion 313 is provided with a cutout 314 on a side away from the arc isolation plate 2, and the cutout 314 serves as the introduction surface. The introduction portion 311 is provided with a chamfer 315, and the chamfer 315 serves as the introduction surface. It is understandable that the positions of the cutout 314 and the chamfer 315 can be interchanged, or both the cutout 314 and the chamfer 315 are used, which all fall within the protection scope of the present utility model.

[0059] Furthermore, at least two of the limit columns 3 are provided, and at least two limit columns 3 are provided along the length direction of the arc isolation plate 2, and at least two limit columns 3 can better constrain the arc isolation plate 2. Of course, there may be more than three limit columns 3, or only one limit column 3, which all belong to the protection scope of the present utility model.

[0060] Furthermore, a second limiting column 7 is provided on the side of the arc isolation plate 2, and the shell 1 is provided with a limiting boss 71 protruding toward the side of the arc isolation plate 2, and the top of the limiting boss 71 is flush with the limiting block 112. The limiting boss 71 is provided with a second limiting groove 72 on the side facing the arc isolation plate 2, and the second limiting column 7 is used to be inserted into the second limiting groove 72. Since the limiting boss 71 is arranged on the outside, there is no need to set the socket 111, but the top is flush with the limiting block 112. When the limiting column 3 is inserted into the limiting groove 11, the second limiting column 7 can be prevented from being blocked by the limiting boss 71.

[0061] like Figure 7-8 As shown, the elastic structure 5 includes a flat-plate-shaped spring piece 52, the spring piece 52 is vertically arranged with the arc isolation plate 2, and the spring piece 52 is provided with a supporting structure 53 and the clamping claw 51 on opposite sides, and the supporting structure 53 is used to support the spring piece 52 so that the clamping claw 51 can be reliably limited with the assembly block 12. Of course, the supporting structure 53 may not be provided, and the limiting can also be achieved by the elasticity of the spring piece 52 itself.

[0062] Specifically, the support structure 53 includes a support plate 531 arranged on the side of the spring sheet 52 away from the claw 51, and the two ends of the support plate 531 are respectively connected to the two side walls opposite to the assembly groove 4. The middle part of the support plate 531 protrudes toward the spring sheet 52 to form an arc-shaped support surface 532. A support platform 533 is provided between the support surface 532 and the spring sheet 52. The support platform 533 is connected between the spring sheet 52 and the support surface 532. The support platform 533 and the assembly groove 4 are connected to the two side walls of the two ends of the support plate 531. The two sides of the support platform 533 are respectively spaced apart, so that the two sides of the support platform 533 form a support surface for The avoidance groove 534 of the avoidance spring piece 52 leaves space for the deformation of the spring piece 52, and the spring piece 52 is supported by the support platform 533. A support sheet 535 is provided on the side of the support plate 531 away from the spring piece 52. The support sheet 535 is connected between the support plate 531 and the bottom of the assembly groove 4. The thickness of the support sheet 535 is less than the thickness of the arc isolation plate 2. The support sheet 535 can support the support plate 531. By setting the support sheet 535 as a thin wall, the deformation and reset function of the elastic structure 5 can be effectively guaranteed, and the arc isolation function can be maximized.

[0063] Of course, the support sheet 535 may not be provided, and the side of the support plate 531 away from the spring sheet 52 is directly connected to the arc isolation plate 2. In addition, the support plate 531 may also adopt other shapes, for example, without providing the arc-shaped support surface 532, but directly supporting the spring sheet 52 through the support platform 533, which all belong to the protection scope of the present utility model.

[0064] In this embodiment, an elastic structure 5 is provided, and the elastic structure 5 is provided between two limiting columns 3. In other embodiments, two or more limiting columns 3 may also be provided, and all of them belong to the protection scope of the present utility model.

[0065] like Figure 5 As shown, the arc isolation plate 2 is provided with a spare structure 8, a spare groove 80 is provided in the middle of the arc isolation plate 2, and the spare structure 8 is provided in the spare groove 80. The spare structure 8 is the same as the supporting structure 53, but the clamping claw 51 is not provided. The spare structure 8 is a spare supplement to the elastic structure 5. The spare structure 8 has not yet been opened for use, and is used for the convenience of subsequent mold improvement.

[0066] like Figure 1-2As shown, a reinforcing plate 21 is provided on the side of the arc isolation plate 2 close to the shell 1. The reinforcing plate 21 is vertically arranged to the arc isolation plate 2. The reinforcing plate 21 can not only effectively support the arc isolation plate 2, but also contact with the shell 1 to play a limiting role.

[0067] like Figure 7-8 As shown, the arc isolation plate 2 of this embodiment is provided with two reinforcing plates 21, the spring piece 52 of the elastic structure 5 is connected to one of the reinforcing plates 21, and the other reinforcing plate 21 is provided with a pressing surface 22 arranged opposite to the upper limit surface 511 of the clamping claw 51, the pressing surface 22 and the limiting surface 511 are used to limit the assembly block 12 from opposite sides respectively, and the reinforcing plate 21, on the basis of effectively supporting the arc isolation plate 2, also cooperates with the clamping claw 51 to limit the assembly block 12. Of course, it is also possible not to provide the pressing surface 22, and only limit the assembly block 12 by the limiting surface 511, or to insert the assembly block 12 into a deeper position of the assembly groove 4, so that the groove wall of the assembly groove 4 and the limiting surface 511 limit the assembly block 12, all of which belong to the protection scope of the utility model.

[0068] Furthermore, a plurality of reinforcing ribs 23 are respectively provided on the opposite side surfaces of the arc isolation plate 2. The plurality of reinforcing ribs 23 are arranged in parallel and are arranged perpendicular to the reinforcing plate 21. The surface of the arc isolation plate 2 can be further effectively supported by the reinforcing ribs 23.

[0069] like Figure 5 , 10 As shown in Figure 11, the arc isolation plate 2 is provided with a tearing groove 24, and a detachable tearing plate 25 is formed on the side of the tearing groove 24 away from the shell 1. The tearing plate 25 can be torn off or cut off along the tearing groove 24 to adjust the width of the arc isolation plate 2. In actual use, the width of the arc isolation plate 2 can be adjusted according to the situation, which is very convenient to use.

[0070] Preferably, two opposite sides of the arc isolation plate 2 are respectively provided with tear grooves 24, and the cross-section of the connection between the tear plate 25 and the tear groove 24 is an isosceles trapezoid. One end of the tear grooves 24 on both sides is connected to form a tearing hole 26. The tearing hole 26 can be easily torn off directly by hand, or the tearing hole 26 may not be provided, and it can also be cut with scissors or other tools, which all fall within the protection scope of the present utility model.

[0071] like Figure 5 As shown, an L-shaped installation mark 27 is provided on the side of the arc isolation plate 2. The installation mark 27 provides an installation guide for the customer, and the customer performs the installation according to the instructions. The installation mark 27 includes a turning arrow composed of two sides, and the two sides are respectively arranged parallel to the width direction and the length direction of the arc isolation plate 2, which is simple, clear and easy to understand.

[0072] 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.

[0073] 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. An arc isolation structure, comprising a housing (1) and an arc isolation plate (2) mounted on the housing (1), characterized in that: The arc isolation plate (2) is provided with a limiting column (3) and an assembly groove (4), an elastic structure (5) is provided in the assembly groove (4), a clamping claw (51) is provided on the elastic structure (5), and limiting surfaces (511) and transition surfaces (512) are provided on opposite sides of the clamping claw (51), respectively; the housing (1) is provided with a limiting groove (11) and an assembly block (12) corresponding to the limiting column (3) and the assembly groove (4), and a socket (111) and a limiting block (112) are provided at opposite ends of the limiting groove (11), respectively; the socket (111) is used for the limiting column (3) to be inserted into the limiting groove (11) and to be removed from the limiting groove (11), and when the limiting column (3) slides to a position where the limiting block (112) is provided in the limiting groove (11), the limiting block (112) restricts the limiting column (3) from being removed from the limiting groove (11); The limiting column (3) is inserted from the socket (111) into the limiting groove (11), and the assembly groove (4) is sleeved on the assembly block (12) of the shell (1), and the assembly block (12) is located on the side of the claw (51) provided with a transition surface (512); the limiting column (3) slides from the position corresponding to the socket (111) to the position provided with the limiting block (112), and the assembly block (12) pushes the transition surface (512), so that the elastic structure (5) bends and drives the claw (51) away from the assembly block (12); when the limiting column (3) slides to the position corresponding to the limiting block (112), the assembly block (12) moves to the side of the claw (51) provided with the limiting surface (511), so that the limiting surface (511) and the assembly block (12) are limited and matched.

2. The arc isolation structure according to claim 1, characterized in that: The elastic structure (5) comprises a spring sheet (52), and a supporting structure (53) and the clamping claw (51) are respectively provided on two opposite sides of the spring sheet (52), and the supporting structure (53) is used to support the spring sheet (52) so that the clamping claw (51) can be reliably limited with the assembly block (12).

3. The arc isolation structure according to claim 2, characterized in that: The support structure (53) comprises a support plate (531) arranged on a side of the spring sheet (52) away from the claw (51); two ends of the support plate (531) are respectively connected to two side walls opposite to the assembly groove (4); a support platform (533) is provided between the support plate (531) and the spring sheet (52); the support platform (533) is connected between the spring sheet (52) and the support plate (531); and the support platform (533) and the two side walls of the assembly groove (4) at both ends of the support plate (531) are respectively arranged at intervals.

4. The arc isolation structure according to claim 3, characterized in that: The middle portion of the support plate (531) protrudes toward the spring sheet (52) to form an arc-shaped support surface (532), and the support platform (533) is connected between the spring sheet (52) and the support surface (532).

5. The arc isolation structure according to claim 3, characterized in that: A support sheet (535) is provided on a side of the support plate (531) away from the spring sheet (52); the support sheet (535) is connected between the support plate (531) and the bottom of the assembly groove (4); and the thickness of the support sheet (535) is less than the thickness of the arc isolation plate (2).

6. The arc isolation structure according to claim 2, characterized in that: Two reinforcing plates (21) are provided, the spring sheet (52) is connected to one of the reinforcing plates (21), and the other reinforcing plate (21) is provided with a pressing surface (22) arranged opposite to the upper limit surface (511) of the clamping claw (51), and the pressing surface (22) and the limiting surface (511) are used to limit the assembly block (12) from two opposite sides respectively.

7. The arc isolation structure according to claim 2, characterized in that: The spring piece (52) is in the shape of a flat plate, and the spring piece (52) and the arc isolation plate (2) are arranged vertically.

8. The arc isolation structure according to claim 1, characterized in that: The limiting column (3) comprises a limiting portion (31) and a connecting portion (32); the length direction of the limiting portion (31) is arranged parallel to the length direction of the arc isolation plate (2); the limiting portion (31) is convexly arranged on one side of the width direction of the arc isolation plate (2); the connecting portion (32) is arranged between the limiting portion (31) and the arc isolation plate (2) and is used to connect the limiting portion (31) and the arc isolation plate (2); the limiting portion (31) is inserted into the limiting groove (11) along the width direction of the arc isolation plate (2) and slides toward the limiting block (112) along the length direction of the arc isolation plate (2).

9. The arc isolation structure according to claim 8, characterized in that: Two opposite side walls of the limiting groove (11) are respectively provided with limiting blocks (112), the two limiting blocks (112) are arranged opposite to each other, and a connecting groove (113) for inserting the connecting part (32) is provided between the two limiting blocks (112); when the limiting part (31) slides toward the limiting block (112) along the length direction of the arc isolation plate (2), the connecting part (32) is driven to be inserted into the connecting groove (113); when the limiting column (3) slides to a position limited by the limiting block (112), the limiting part (31) is inserted between the two limiting blocks (112) and the bottom of the limiting groove (11).

10. The arc isolation structure according to claim 8, characterized in that: The limiting portion (31) is cylindrical, and the axis of the limiting portion (31) is arranged parallel to the length direction of the arc isolation plate (2).

11. The arc isolation structure according to claim 8, characterized in that: The limiting portion (31) comprises an introduction portion (311), a transition portion (312) and an interference portion (313) which are sequentially arranged along the length direction of the arc isolation plate (2); the interference portion (313) is slidably engaged with the limiting groove (11); the diameter of the introduction portion (311) is smaller than that of the interference portion (313); the diameter of the transition portion (312) is between the introduction portion (311) and the interference portion (313); and the diameter of the transition portion (312) changes along the length direction of the arc isolation plate (2), so that the circumferential surface of the transition portion (312) gradually shrinks in a direction close to the introduction portion (311), and forms a transition surface (512) arranged at an oblique angle to the length direction of the arc isolation plate (2).

12. The arc isolation structure according to claim 8, characterized in that: The limiting portion (31) is provided with guide surfaces at two opposite ends along the length direction of the arc isolation plate (2), the guide surfaces being arranged on the side of the limiting portion (31) away from the arc isolation plate (2) and respectively cooperating with the sockets (111) of the limiting groove (11), and the guide surfaces being arranged at an oblique angle with respect to the width direction of the arc isolation plate (2).

13. The arc isolation structure according to claim 11, characterized in that: The interference portion (313) is provided with a cutout (314) on a side away from the arc isolation plate (2), and the introduction portion (311) is provided with a chamfer (315).

14. The arc isolation structure according to claim 1, characterized in that: A second limiting column (7) is provided on the side of the arc isolation plate (2); the housing (1) is provided with a limiting boss (71) protruding toward the side of the arc isolation plate (2); the top of the limiting boss (71) is flush with the limiting block (112); a second limiting groove (72) is provided on the side of the limiting boss (71) facing the arc isolation plate (2); and the second limiting column (7) is used to be inserted into the second limiting groove (72).

15. The arc isolation structure according to claim 1, characterized in that: The arc isolation plate (2) is made of rubber material, and the elastic structure (5) and the arc isolation plate (2) are an integrated structure.

16. The arc isolation structure according to claim 1, characterized in that: At least two of the limiting columns (3) are provided, and at least two of the limiting columns (3) are arranged along the length direction of the arc isolation plate (2).

17. The arc isolation structure according to claim 1, characterized in that: A reinforcing plate (21) is provided on the side of the arc isolation plate (2) close to the shell (1), and the reinforcing plate (21) is arranged perpendicular to the arc isolation plate (2).

18. The arc isolation structure according to claim 17, characterized in that: A plurality of reinforcing ribs (23) are respectively arranged on the two opposite side surfaces of the arc isolation plate (2), the plurality of reinforcing ribs (23) are arranged in parallel, and the plurality of reinforcing ribs (23) are all arranged perpendicular to the reinforcing plate (21).

19. The arc isolation structure according to claim 1, characterized in that: The arc isolation plate (2) is provided with a tearing groove (24), and a detachable tearing plate (25) is formed on the side of the tearing groove (24) away from the housing (1).

20. The arc isolation structure according to claim 19, characterized in that: Two opposite sides of the arc isolation plate (2) are respectively provided with tearing grooves (24), the cross section of the connection between the tearing plate (25) and the tearing groove (24) is an isosceles trapezoid, and one end of the tearing grooves (24) on both sides is connected to form a tearing opening (26).

21. The arc isolation structure according to claim 1, characterized in that: An L-shaped installation mark (27) is provided on the side of the arc isolation plate (2), and the installation mark (27) comprises a turning arrow formed by two side edges, and the two side edges are respectively arranged parallel to the width direction and the length direction of the arc isolation plate (2).

22. The arc isolation structure according to claim 2, characterized in that: The arc isolation plate (2) is provided with a spare groove (80) in the middle, and a spare structure (8) is provided in the spare groove (80), and the spare structure (8) is the same as the supporting structure (53).

23. The arc isolation structure according to claim 1, characterized in that: Two limiting columns (3) and an elastic structure (5) are provided, and the elastic structure (5) is provided between the two limiting columns (3).

24. The arc isolation structure according to claim 1, characterized in that: The direction in which the limiting column (3) is installed into the socket (111) is a first direction, and the direction in which the limiting column (3) slides from a position corresponding to the socket (111) to a position where the limiting block (112) is provided is a second direction, and the first direction is perpendicular to the second direction.

25. A contactor, characterized in that: It comprises an electromagnetic system, a contact system and an arc-isolating structure as described in any one of claims 1 to 24, wherein the electromagnetic system and the contact system are respectively arranged in a shell (1) of the arc-isolating structure, the contact system is provided with at least two phase poles, and at least two phase poles each comprise a moving contact and static contacts respectively arranged at both ends of the corresponding moving contact, and two connecting terminals (6) are respectively arranged corresponding to the at least two phase poles, and the two connecting terminals (6) corresponding to each phase pole are relatively arranged on both sides of the shell (1), and the arc-isolating plate (2) is located between two adjacent connecting terminals (6) on the same side of the shell (1), and the two static contacts of each phase pole are respectively connected to the circuit through the connecting terminals (6), and the electromagnetic system is used to drive the moving contact to move, so that the moving contact contacts and separates with the corresponding two static contacts, thereby connecting and disconnecting the circuit connected to the static contact.

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