Main loop device of automatic transfer switching equipment

Abstract

The invention discloses a main loop device of automatic transfer switching equipment. The main loop device comprises a shell, an operating handle, a connecting rod, a shaft, a rocker arm, a first power supply moving contact assembly, a second power supply moving contact assembly, a load end line bank, a first tension spring, a second tension spring, a first wire, a second wire, a first power supply static contact assembly and a second power supply static contact assembly, wherein the operating handle acts to drive the rocker arm to rotate through the connecting rod so as to drive the first power supply moving contact assembly to be in contact with or separated from the first power supply static contact assembly, or drive the second power supply moving contact assembly to be in contact with or separated from the second power supply static contact assembly. The main loop device of the automatic transfer switching equipment is small in size, relatively compact in structure, applicable to a household indoor box, simple and convenient to operate, and safe and reliable in performance.

Description

Technical Field

[0001] The invention relates to the technical field of switch electrical appliances, and in particular to a main circuit device of an automatic switching switch electrical appliance. Background Art

[0002] A dual power automatic transfer switch is a device that can automatically switch between two power sources. It is often used in key equipment or systems. When the main power fails, it can quickly switch to the backup power supply to ensure normal power supply to the equipment.

[0003] Photovoltaic (solar) power generation will dominate in the future. There are already user energy storage systems that provide solar power generation to users, which can not only effectively save electricity costs but also ensure the stability of electricity use; the popularity of energy storage systems for household users and industrial and commercial new energy power generation system users will gradually increase in the future; therefore, in the future, household users will inevitably popularize solar power generation and city electricity dual power supply, which will inevitably require the use of dual power automatic transfer switches. However, traditional automatic transfer switches are large in size and cannot be used in household indoor boxes. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a main circuit device of an automatic transfer switch electrical appliance.

[0005] The technical solution adopted by the present invention to solve the technical problem is: construct a main circuit device of an automatic transfer switch electrical appliance, including a housing, an operating handle, a connecting rod, a shaft, a rocker arm, a first power moving contact assembly, a second power moving contact assembly, a load end terminal row, a first tension spring, a second tension spring, a first wire, a second wire, a first power static contact assembly and a second power static contact assembly;

[0006] The operating handle is rotatably installed in the housing, the rocker arm is rotatably installed in the housing through the shaft, the rocker arm is located below the operating handle, and the rocker arm is connected to the operating handle through the connecting rod; the first power moving contact assembly and the second power moving contact assembly are installed in the housing, the first power moving contact assembly is located above the second power moving contact assembly, and both are matched with the rocker arm, the first power moving contact assembly is connected to the shaft through the first tension spring, and the second power moving contact assembly is connected to the shaft through the second tension spring; the load-end terminal block is arranged in the housing and is located on the right side of the rocker arm; the first power moving contact assembly is connected to the load-end terminal block through the first wire, and the second power moving contact assembly is connected to the load-end terminal block through the second wire;

[0007] The first power static contact assembly and the second power static contact assembly are arranged on the left side of the rocker arm, and the first power static contact assembly is located above the second power static contact assembly;

[0008] Wherein, the operation handle drives the rocker arm to rotate through the connecting rod to drive the first power moving contact assembly to contact or separate with the first power static contact assembly, or to drive the second power moving contact assembly to contact or separate with the second power static contact assembly.

[0009] In some embodiments, the operating handle includes a handle body and an operating portion connected to the handle body, the operating portion protrudes from the upper side of the housing, and a first connecting portion is further provided on the handle body;

[0010] A second connection portion is provided at one end of the rocker arm close to the load-end wiring row, and the connecting rod is in a U-shaped structure, with two ends of the connecting rod respectively connected to the first connection portion and the second connection portion.

[0011] In some embodiments, the rocker arm is in a U-shaped structure, and includes a first positioning plate and a second positioning plate arranged in parallel and spaced apart, the second ends of the first positioning plate and the second positioning plate are connected together, and the shaft passes through the first positioning plate and the second positioning plate so that the rocker arm can be rotatably installed in the housing;

[0012] The first power moving contact assembly is of a U-shaped structure, comprising a first main body, a first side plate and a second side plate are respectively provided on both sides of the first main body, the first side plate and the second side plate are respectively located on the outside of the first positioning plate and the second positioning plate; the first end of the first tension spring is connected to the first main body, and the second end of the first tension spring is connected to the part of the shaft located between the first positioning plate and the second positioning plate; the first power moving contact assembly also includes a first contact portion connected to the first main body;

[0013] The second power moving contact assembly is in a U-shaped structure, and includes a second main body, and a third side plate and a fourth side plate are respectively provided on both sides of the second main body, and the third side plate and the fourth side plate are respectively located on the outside of the first positioning plate and the second positioning plate; the first end of the second tension spring is connected to the second main body, and the second end of the second tension spring is connected to the part of the shaft located between the first positioning plate and the second positioning plate; the second power moving contact assembly also includes a second contact portion connected to the second main body.

[0014] In some embodiments, a first through hole is provided on the first main body, and the first end of the first tension spring is connected to the first through hole;

[0015] The second main body is provided with a second through hole, and the first end of the second tension spring is connected to the second through hole.

[0016] In some embodiments, the first positioning plate and the second positioning plate are provided with a first convex portion and a second convex portion on opposite sides thereof, and above the first convex portion and the second convex portion;

[0017] The second ends of the first side plate and the second side plate are both provided with a first recess matched with the first protrusion, and the second ends of the third side plate and the fourth side plate are both provided with a second recess matched with the second protrusion.

[0018] In some embodiments, the relative inner side walls of the shell are provided with a limiting groove, the middle part of the limiting groove is provided with a limiting block, the limiting groove includes a first vertical edge, a first inclined edge, a second vertical edge, and a second inclined edge; the first vertical edge and the first inclined edge are located above the limiting block, the upper end of the first inclined edge is connected to the lower end of the first vertical edge, and the first inclined edge is inclined and extends toward the lower left;

[0019] The second vertical edge and the second inclined edge are located below the limit block, the upper end of the second vertical edge is connected to the lower end of the second inclined edge, and the second inclined edge is inclined and extends toward the upper left; the first side panel and the second side panel are provided with a first limit column on their opposite sides, the first limit column is located in the limit groove and can move along the first vertical edge and the first inclined edge; the third side panel and the fourth side panel are provided with a second limit column on their opposite sides, the second limit column is located in the limit groove and can move along the second vertical edge and the second inclined edge.

[0020] In some embodiments, the lower part of the first end of the first side plate and the second side plate is provided with a first inclined limiting edge for abutting against the upper surface of the limiting block; the upper part of the first end of the first side plate and the second side plate is provided with a second inclined limiting edge for abutting against the lower surface of the limiting block.

[0021] In some embodiments, the main circuit device of the automatic transfer switch electrical appliance further includes an arc extinguishing chamber; the arc extinguishing chamber is installed in the housing, and the arc extinguishing chamber is located between the first power static contact assembly and the second power static contact assembly.

[0022] In some embodiments, the first conductive wire and the second conductive wire both include copper flexible conductive wires.

[0023] In some embodiments, the housing includes a first shell and a second shell that are detachably connected.

[0024] The implementation of the present invention has the following beneficial effects: the main circuit device of the automatic transfer switch electrical appliance is small in size and relatively compact in structure, and can be applied to household indoor boxes; and the main circuit device of the automatic transfer switch electrical appliance is simple and convenient to operate, and has safe and reliable performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work. In the drawings:

[0026] Figure 1 is a schematic structural diagram of a main circuit device of an automatic transfer switch electrical appliance in some embodiments of the present invention;

[0027] Figure 2 It is a structural schematic diagram of a main circuit device of an automatic transfer switch electrical appliance in some embodiments of the present invention being in a double-open position;

[0028] Figure 3 It is a structural schematic diagram of a main circuit device of an automatic transfer switch electrical appliance in some embodiments of the present invention in a power-on position I;

[0029] Figure 4 It is a structural schematic diagram of a main circuit device of an automatic transfer switch electrical appliance in some embodiments of the present invention being in a II power-on position;

[0030] Figure 5 It is a schematic diagram of the application structure of the first tension spring and the second tension spring of the main circuit device of the automatic transfer switch electrical appliance in some embodiments of the present invention;

[0031] Figure 6 is one of the schematic structural diagrams of the housing in some embodiments of the present invention;

[0032] Figure 7 is a second schematic diagram of the structure of the housing in some embodiments of the present invention;

[0033] Figure 8 It is a partial structural schematic diagram of a main circuit device of an automatic transfer switch electrical appliance in some embodiments of the present invention;

[0034] Fig. 9 is a schematic diagram of the structure of a rocker arm in some embodiments of the present invention;

[0035] Fig.10 is a schematic structural diagram of a first power moving contact assembly in some embodiments of the present invention;

[0036] Fig.11It is a schematic diagram of the structure of the second power moving contact assembly in some embodiments of the present invention. DETAILED DESCRIPTION

[0037] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0038] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0039] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0040] See also Figures 1 to 5The present invention shows a main circuit device of an automatic transfer switch electrical appliance, including a housing 10, an operating handle 20, a connecting rod 30, a shaft 40, a rocker arm 50, a first power moving contact assembly 60, a second power moving contact assembly 70, a load end terminal block 80, a first tension spring 90, a second tension spring 100, a first wire 110, a second wire 120, a first power static contact assembly 130 and a second power static contact assembly 140.

[0041] The operating handle 20 is rotatably mounted in the housing 10, and the rocker arm 50 is rotatably mounted in the housing 10 through the shaft 40. The rocker arm 50 is located below the operating handle 20, and the rocker arm 50 is connected to the operating handle 20 through the connecting rod 30; the first power moving contact assembly 60 and the second power moving contact assembly 70 are installed in the housing 10, and the first power moving contact assembly 60 is located above the second power moving contact assembly 70, and both are matched with the rocker arm 50. The first power moving contact assembly 60 is connected to the shaft 40 through the first tension spring 90, and the second power moving contact assembly 70 is connected to the shaft 40 through the second tension spring 100; the load end terminal block 80 is arranged in the housing 10 and is located on the right side of the rocker arm 50; the first power moving contact assembly 60 is connected to the load end terminal block 80 through the first wire 110, and the second power moving contact assembly 70 is connected to the load end terminal block 80 through the second wire 120.

[0042] The first power static contact assembly 130 and the second power static contact assembly 140 are arranged on the left side of the rocker arm 50, and the first power static contact assembly 130 is located above the second power static contact assembly 140. It should be explained that in this embodiment, the left side, right side, upper side and lower side are based on Figures 2 to 5 is defined by the orientation of the diagram.

[0043] Among them, the operating handle 20 is actuated to drive the rocker arm 50 to rotate through the connecting rod 30, so as to drive the first power moving contact assembly 60 to contact or separate from the first power static contact assembly 130 to connect or disconnect the current with the first power static contact assembly 130, or drive the second power moving contact assembly 70 to contact or separate from the second power static contact assembly 140 to connect or disconnect the current with the second power static contact assembly 140.

[0044] like Figure 1As shown, in some embodiments, the operating handle 20 includes a handle body 21 and an operating portion 22 connected to the handle body 21, the operating portion 22 protruding from the upper side of the housing 10 for the user to operate, the inner side wall of the housing 10 is also provided with a mounting seat 13, the handle body 21 is roughly cylindrical, and the handle body 21 is provided with a mounting groove matched with the mounting seat 13, further, a guide portion 14 is further provided in the housing 10, the operating portion 22 is also provided with a guide groove, the guide groove and the guide portion 14 cooperate with each other, the guide portion 14 can be roughly arc-shaped, when the user operates the operating handle 20, the operating portion 22 moves along the guide portion 14. Further, the handle body 21 is also provided with a first connecting portion 23.

[0045] The second connection portion 51 is disposed at one end of the rocker arm 50 close to the load terminal wiring row 80. The connecting rod 30 is in a U-shaped structure, and the two ends of the connecting rod 30 are respectively connected to the first connection portion 23 and the second connection portion 51. In some embodiments, the rocker arm 50 can also be defined as a "swing arm".

[0046] The operating handle 20 controls the rocker arm 50 to rotate up and down through the connecting rod 30, thereby driving the first power moving contact assembly 60 to close or open or the second power moving contact assembly 70 to close or open.

[0047] Combination Figure 1 , Figures 8 to 11 In some embodiments, the rocker arm 50 is in a U-shaped structure, and the rocker arm 50 includes a first positioning plate 52 and a second positioning plate 53 that are arranged in parallel and spaced apart. The second ends of the first positioning plate 52 and the second positioning plate 53 are connected together, and the second ends of the first positioning plate 52 and the second positioning plate 53 are provided with a second connecting portion 51. The shaft 40 is passed through the first positioning plate 52 and the second positioning plate 53 so that the rocker arm 50 can be rotatably installed in the housing 10. The shaft 40 is passed through the middle of the first positioning plate 52 and the second positioning plate 53 so that the rocker arm 50 can be rotatably installed in the housing 10. The middle of the first positioning plate 52 and the second positioning plate 53 can be provided with a through hole for the shaft 40 to pass through. Fig. 9 As shown, the left side of the first positioning plate 52 and the second positioning plate 53 is the first end, the left side of the first positioning plate 52 and the second positioning plate 53 is the second end, and the longitudinal dimensions of the first positioning plate 52 and the second positioning plate 53 can be gradually reduced from the first end to the second end.

[0048] like Fig.10As shown, in some embodiments, the first power moving contact assembly 60 is a U-shaped structure, and the first power moving contact assembly 60 includes a first main body 61, and the first side plate 62 and the second side plate 63 are respectively provided on both sides of the first main body 61, and the first side plate 62 and the second side plate 63 are respectively located on the outside of the first positioning plate 52 and the second positioning plate 53. The first end of the first tension spring 90 is connected to the first main body 61, and the second end of the first tension spring 90 is connected to the part of the shaft 40 located between the first positioning plate 52 and the second positioning plate 53 (combined with Figure 5 ). The first power moving contact assembly 60 also includes a first contact portion 64 connected to the first main body portion 61. Preferably, the first main body portion 61 is generally in a plate-like structure, and the first main body portion 61 may have a first end and a second end opposite to each other, the first side plate 62 and the second side plate 63 are arranged to protrude from the second end of the first main body portion 61, and the first contact portion 64 is connected to the first end of the first main body portion 61, and the first contact portion 64 is used to contact or separate from the first power static contact assembly 130.

[0049] The second power moving contact assembly 70 is a U-shaped structure. The second power moving contact assembly 70 includes a second main body 71. The second main body 71 has a third side plate 72 and a fourth side plate 73 on both sides. The third side plate 72 and the fourth side plate 73 are respectively located on the outside of the first positioning plate 52 and the second positioning plate 53; the first end of the second tension spring 100 is connected to the second main body 71, and the second end of the second tension spring 100 is connected to the part of the shaft 40 located between the first positioning plate 52 and the second positioning plate 53 (combined with Figure 5 ); the second power moving contact assembly 70 also includes a second contact portion 74 connected to the second main body 71. Preferably, the second main body 71 is generally in a plate-like structure, and the second main body 71 may have a first end and a second end opposite to each other, the third side plate 72 and the fourth side plate 73 are arranged to protrude from the second end of the second main body 71, and the second contact portion 74 is connected to the first end of the second main body 71, and the second contact portion 74 is used to contact or separate from the second power static contact assembly 140.

[0050] Combination Figure 5 , Fig.10 and Fig.11 As shown, the first main body 61 is provided with a first through hole 611, the first end of the first tension spring 90 is connected to the first through hole 611, the first end of the first tension spring 90 can hook the first through hole 611, and the second end of the first tension spring 90 can hook the shaft 40. The second main body 71 is provided with a second through hole 711, the first end of the second tension spring 100 is connected to the second through hole 711, the first end of the second tension spring 100 can hook the second through hole 711, and the second end of the second tension spring 100 can hook the shaft 40.

[0051] Combination Figures 9 to 11 As shown, the first locating plate 52 and the second locating plate 53 are provided with a first convex portion 54 and a second convex portion 55 on the opposite sides, and the first convex portion 54 and the second convex portion 55 are above. The second ends of the first side plate 62 and the second side plate 63 are provided with a first concave portion 65 matched with the first convex portion 54, and the second ends of the third side plate 72 and the fourth side plate 73 are provided with a second concave portion 75 matched with the second convex portion 55, wherein the first convex portion 54 and the first concave portion 65 are rotatably connected by pin contact, and similarly, the second convex portion 55 and the second concave portion 75 are rotatably connected by pin contact. Preferably, the first convex portion 54 and the second convex portion 55 can be cylindrical structures, and the first concave portion 65 and the second concave portion 75 can include U-shaped grooves, C-shaped grooves or arc grooves.

[0052] Combination Figure 6 and Figure 7 As shown, in some embodiments, the relative inner side walls of the housing 10 are provided with a limiting groove 11, and the limiting groove 11 is arranged near one side of the first power static contact assembly 130 or the second power static contact assembly 140. A limiting block 12 is arranged in the middle of the limiting groove 11, and the upper and lower surfaces of the limiting block 12 are both planes. The limiting groove 11 includes a first vertical edge 11a, a first inclined edge 11b, a second vertical edge 11c, and a second inclined edge 11d; the first vertical edge 11a and the first inclined edge 11b are located above the limiting block 12, and the upper end of the first inclined edge 11b is connected to the lower end of the first vertical edge 11a, and the first inclined edge 11b is arranged to extend obliquely toward the lower left. Wherein, the connection between the upper end of the first inclined edge 11b and the lower end of the first vertical edge 11a forms a first limiting groove a.

[0053] The second vertical edge 11c and the second inclined edge 11d are located below the stopper 12, the upper end of the second vertical edge 11c is connected to the lower end of the second inclined edge 11d, the second inclined edge 11d is inclined and extends toward the upper left, the upper end of the second inclined edge 11d may be connected to the lower end of the first inclined edge 11b, and the stopper 12 may be located at the connection between the first inclined edge 11b and the second inclined edge 11d. The connection between the lower end of the second vertical edge 11cc and the upper end of the second inclined edge 11d forms a second stopper groove b.

[0054] Among them, the first side plate 62 and the second side plate 63 are each provided with a first limiting column 66 on the opposite sides thereof, and the first limiting column 66 is located in the limiting groove 11 and can move along the first vertical edge 11a and the first inclined edge 11b; the third side plate 72 and the fourth side plate 73 are each provided with a second limiting column 76 on the opposite sides thereof, and the second limiting column 76 is located in the limiting groove 11 and can move along the second vertical edge 11c and the second inclined edge 11d.

[0055] like Fig.10 and Fig.11 As shown, in some embodiments, the lower portion of the first end of the first side plate 62 and the second side plate 63 is provided with a first inclined limiting edge 67 for abutting against the upper surface of the limit block 12; the upper portion of the first end of the first side plate 62 and the second side plate 63 is provided with a second inclined limiting edge 77 for abutting against the lower surface of the limit block 12.

[0056] like Figures 1 to 5 As shown, in some embodiments, the main circuit device of the automatic transfer switch electrical appliance further includes an arc extinguishing chamber 150; the arc extinguishing chamber 150 is installed in the housing 10, and the arc extinguishing chamber 150 is located between the first power static contact assembly 130 and the second power static contact assembly 140. When the first power moving contact assembly 60 or the second power moving contact assembly 70 is opened, the arc extinguishing chamber 150 extinguishes the arc.

[0057] In some embodiments, the two ends of the first wire 110 can be respectively welded to the first power moving contact assembly 60 and the load terminal wiring bar 80. The two ends of the second wire 120 can be respectively welded to the second power moving contact assembly 70 and the load terminal wiring bar 80. Preferably, the first wire 110 and the second wire 120 both include copper soft wires.

[0058] In some embodiments, the housing 10 includes a first shell 10a and a second shell 10b that are detachably connected, and the two shells can be fixed by threaded connection.

[0059] The main circuit device of the automatic transfer switch is used as follows:

[0060] like Figure 2 , Figure 6 and Figure 7 As shown, the operating handle 20 is in the double-open position, and the rocker arm 50 is also in the double-open position under the action of the connecting rod 30. Under the tension of the first tension spring 90, the first limiting column 66 on the first power moving contact assembly 60 and the first limiting groove a of the limiting groove 11 on the housing 10 are limited and supported between the first recess 65 on the first power moving contact assembly 60 and the shaft 40, thereby maintaining the double-open position; under the tension of the second tension spring 100, the second limiting column 76 on the second power moving contact assembly 70 and the second limiting groove b of the limiting groove 11 on the housing 10 are limited and supported between the second recess 75 on the second power moving contact assembly 70 and the shaft 40, thereby maintaining the double-open position.

[0061] Combination Figure 2 , Figure 3 , Figure 6 and Figure 7As shown, the operating handle 20 rotates counterclockwise from the double-open position to drive the rocker arm 50 to move counterclockwise upward, and the first recess 65 of the first power moving contact assembly 60 is squeezed downward by the first protrusion 54 of the rocker arm 50. At the same time, the first inclined limiting edge 67 of the first power moving contact assembly 60 receives the upward support force from the limiting block 12. Under the action of this combined force, the first power moving contact assembly 60 rotates upward around the first protrusion 54 on the rocker arm 50 through its first recess 65. When the tension direction of the first tension spring 90 exceeds the first protrusion 54 of the rocker arm 50, the first power moving contact assembly 60 rotates rapidly upward under the action of the tension of the first tension spring 90 to contact the first power static contact assembly 130 for closing. Similarly, When the operating handle 20 rotates clockwise from the I power closing position, driving the rocker arm 50 to move downward clockwise, the first recess 65 of the first power moving contact assembly 60 is squeezed upward by the first protrusion 54 of the rocker arm 50. At the same time, the first power moving contact assembly 60 is supported downward by the first power static contact assembly 130. Under the action of this combined force, the first power moving contact assembly 60 rotates downward around the first protrusion 54 on the rocker arm 50 through its first recess 65. When the pulling direction of the first tension spring 90 exceeds the first protrusion 54 of the rocker arm 50, the first power moving contact assembly 60 rotates downward rapidly away from the first power static contact assembly 130 under the action of the pulling force of the first tension spring 90, thereby realizing the opening of the I power supply.

[0062] Combination Figure 2 , Figure 4 , Figure 6 and Figure 7As shown, the operating handle 20 rotates clockwise from the double-open position to drive the rocker arm 50 to move downward clockwise, and the second recess 75 of the second power moving contact assembly 70 is squeezed upward by the second protrusion 55 of the rocker arm 50. At the same time, the second inclined limiting edge 77 of the second power moving contact assembly 70 receives the downward support force from the limiting block 12. Under the action of this combined force, the second power moving contact assembly 70 rotates downward around the second protrusion 55 on the rocker arm 50 through its second recess 75. When the pulling direction of the second tension spring 100 exceeds the second protrusion 55 of the rocker arm 50, the second power moving contact assembly 70 rotates downward rapidly under the action of the pulling force of the second tension spring 100 and contacts the second power static contact assembly 140 to close the circuit. Similarly, when The operating handle 20 rotates counterclockwise from the II power closing position, driving the rocker arm 50 to move counterclockwise upward, and the second recess 75 of the second power moving contact assembly 70 is squeezed downward by the second protrusion 55 of the rocker arm 50. At the same time, the second power moving contact assembly 70 is supported upward by the second power static contact assembly 140. Under the action of this combined force, the second power moving contact assembly 70 rotates upward around the second protrusion 55 on the rocker arm 50 through its second recess 75. When the pulling direction of the second tension spring 100 exceeds the second protrusion 55 of the rocker arm 50, the second power moving contact assembly 70 quickly rotates upward away from the second power static contact assembly 140 under the action of the pulling force of the second tension spring 100, thereby realizing the opening of the II power supply.

[0063] The main circuit device of the automatic transfer switch electrical appliance is small in size and relatively compact in structure, can be applied to household indoor boxes, can be suitable for guide rail installation, and the main circuit device of the automatic transfer switch electrical appliance is simple and convenient to operate, and has safe and reliable performance.

[0064] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the scope covered by the claims of the present invention.

Claims

1. A main circuit device of an automatic transfer switch electrical appliance, characterized in that: The invention comprises a housing (10), an operating handle (20), a connecting rod (30), a shaft (40), a rocker arm (50), a first power moving contact assembly (60), a second power moving contact assembly (70), a load end terminal block (80), a first tension spring (90), a second tension spring (100), a first wire (110), a second wire (120), a first power stationary contact assembly (130) and a second power stationary contact assembly (140); The operating handle (20) is rotatably mounted in the housing (10); the rocker arm (50) is rotatably mounted in the housing (10) via the shaft (40); the rocker arm (50) is located below the operating handle (20), and the rocker arm (50) is connected to the operating handle (20) via the connecting rod (30); the first power moving contact assembly (60) and the second power moving contact assembly (70) are mounted in the housing (10); the first power moving contact assembly (60) is located above the second power moving contact assembly (70), and both are connected to the rocker arm (50). The first power moving contact assembly (60) is connected to the shaft (40) through the first tension spring (90), and the second power moving contact assembly (70) is connected to the shaft (40) through the second tension spring (100); the load end terminal block (80) is arranged in the housing (10) and is located on the right side of the rocker arm (50); the first power moving contact assembly (60) is connected to the load end terminal block (80) through the first wire (110), and the second power moving contact assembly (70) is connected to the load end terminal block (80) through the second wire (120); The first power static contact assembly (130) and the second power static contact assembly (140) are arranged on the left side of the rocker arm (50), and the first power static contact assembly (130) is located above the second power static contact assembly (140); The operating handle (20) is actuated to drive the rocker arm (50) to rotate via the connecting rod (30), thereby driving the first power moving contact assembly (60) to contact or separate from the first power stationary contact assembly (130), or driving the second power moving contact assembly (70) to contact or separate from the second power stationary contact assembly (140).

2. The main circuit device of the automatic transfer switch according to claim 1 is characterized in that: The operating handle (20) comprises a handle body (21) and an operating portion (22) connected to the handle body (21), wherein the operating portion (22) protrudes from the upper side of the housing (10), and a first connecting portion (23) is also provided on the handle body (21); A second connection portion (51) is provided at one end of the rocker arm (50) close to the load-end wiring row (80); the connecting rod (30) is in a U-shaped structure; and two ends of the connecting rod (30) are respectively connected to the first connection portion (23) and the second connection portion (51).

3. The main circuit device of the automatic transfer switch according to claim 1 is characterized in that: The rocker arm (50) is of a U-shaped structure, and comprises a first positioning plate (52) and a second positioning plate (53) which are arranged in parallel and spaced apart from each other, the second ends of the first positioning plate (52) and the second positioning plate (53) are connected together, and the shaft (40) passes through the first positioning plate (52) and the second positioning plate (53) so that the rocker arm (50) can be rotatably installed in the housing (10); The first power moving contact assembly (60) is of a U-shaped structure, comprising a first main body (61), with a first side plate (62) and a second side plate (63) respectively disposed on both sides of the first main body (61), the first side plate (62) and the second side plate (63) respectively being located on the outside of the first positioning plate (52) and the second positioning plate (53); a first end of the first tension spring (90) is connected to the first main body (61), and a second end of the first tension spring (90) is connected to a portion of the shaft (40) located between the first positioning plate (52) and the second positioning plate (53); the first power moving contact assembly (60) further comprises a first contact portion (64) connected to the first main body (61); The second power moving contact assembly (70) is of a U-shaped structure, comprising a second main body (71), with a third side plate (72) and a fourth side plate (73) respectively disposed on both sides of the second main body (71), the third side plate (72) and the fourth side plate (73) respectively being located on the outer sides of the first positioning plate (52) and the second positioning plate (53); the first end of the second tension spring (100) is connected to the second main body (71), and the second end of the second tension spring (100) is connected to the portion of the shaft (40) located between the first positioning plate (52) and the second positioning plate (53); the second power moving contact assembly (70) also comprises a second contact portion (74) connected to the second main body (71).

4. The main circuit device of the automatic transfer switch electrical appliance according to claim 3, characterized in that: A first through hole (611) is provided on the first main body portion (61), and the first end of the first tension spring (90) is connected to the first through hole (611); A second through hole (711) is provided on the second main body portion (71), and the first end of the second tension spring (100) is connected to the second through hole (711).

5. The main circuit device of the automatic transfer switch electrical appliance according to claim 3, characterized in that: The first positioning plate (52) and the second positioning plate (53) are both provided with a first convex portion (54) and a second convex portion (55) on opposite sides thereof, and above the first convex portion (54) and the second convex portion (55); The second ends of the first side plate (62) and the second side plate (63) are both provided with a first recess (65) matching with the first protrusion (54), and the second ends of the third side plate (72) and the fourth side plate (73) are both provided with a second recess (75) matching with the second protrusion (55).

6. The main circuit device of the automatic transfer switch electrical appliance according to claim 3, characterized in that: The relative inner side walls of the housing (10) are each provided with a limiting groove (11), a limiting block (12) is provided in the middle of the limiting groove (11), and the limiting groove (11) comprises a first vertical edge (11a), a first inclined edge (11b), a second vertical edge (11c), and a second inclined edge (11d); the first vertical edge (11a) and the first inclined edge (11b) are located above the limiting block (12), the upper end of the first inclined edge (11b) is connected to the lower end of the first vertical edge (11a), and the first inclined edge (11b) is arranged to extend obliquely toward the lower left; The second vertical edge (11c) and the second inclined edge (11d) are located below the limiting block (12); the upper end of the second vertical edge (11c) is connected to the lower end of the second inclined edge (11d); and the second inclined edge (11d) is inclined and extends toward the upper left; the first side plate (62) and the second side plate (63) are provided with a first limiting column (66) on the opposite sides thereof; the first limiting column (66) is located in the limiting groove (11) and can move along the first vertical edge (11a) and the first inclined edge (11b); the third side plate (72) and the fourth side plate (73) are provided with a second limiting column (76) on the opposite sides thereof; the second limiting column (76) is located in the limiting groove (11) and can move along the second vertical edge (11c) and the second inclined edge (11d).

7. The main circuit device of the automatic transfer switch electrical appliance according to claim 6, characterized in that: The lower part of the first end of the first side plate (62) and the second side plate (63) is provided with a first inclined limiting edge (67) for abutting against the upper surface of the limiting block (12); the upper part of the first end of the first side plate (62) and the second side plate (63) is provided with a second inclined limiting edge (77) for abutting against the lower surface of the limiting block (12).

8. The main circuit device of the automatic transfer switch according to claim 1, characterized in that: The main circuit device of the automatic transfer switch electrical appliance further comprises an arc extinguishing chamber (150); the arc extinguishing chamber (150) is installed in the housing (10), and the arc extinguishing chamber (150) is located between the first power static contact assembly (130) and the second power static contact assembly (140).

9. The main circuit device of the automatic transfer switch electrical appliance according to claim 1, characterized in that: The first conductive wire (110) and the second conductive wire (120) both comprise soft copper conductive wires.

10. The main circuit device of the automatic transfer switch electrical appliance according to claim 1, characterized in that: The housing (10) comprises a first shell (10a) and a second shell (10b) which are detachably connected.

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