Main loop device of automatic transfer switching equipment

Abstract

The utility model 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 lead, a second lead, 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] This utility model relates to the field of switchgear technology, and in particular to a main circuit device for an automatic switching switchgear. Background Technology

[0002] Dual power automatic transfer switch is a device that can automatically switch between two power sources. It is often used in critical equipment or systems to quickly switch to backup power when the main power source fails, ensuring normal power supply to the equipment.

[0003] In the future, photovoltaic (solar) power generation will dominate. Existing user energy storage systems provide solar power to users, effectively saving electricity costs and ensuring power stability. The adoption of energy storage systems by residential and industrial / commercial renewable energy power generation systems will gradually increase. Therefore, future residential users will inevitably require both solar power and mains power, necessitating the use of automatic transfer switches. However, traditional automatic transfer switches are bulky and unsuitable for indoor applications like residential parcel lockers. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a main circuit device for an automatic transfer switch.

[0005] The technical solution adopted by this utility model to solve its technical problem is: to construct a main circuit device for an automatic transfer switch, 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 block, a first tension spring, a second tension spring, a first wire, a second wire, a first power stationary contact assembly, and a second power stationary contact assembly.

[0006] The operating handle is rotatably mounted inside the housing. The rocker arm is rotatably mounted inside the housing via the shaft. The rocker arm is located below the operating handle and is connected to the operating handle via the connecting rod. The first power moving contact assembly and the second power moving contact assembly are mounted inside the housing. The first power moving contact assembly is located above the second power moving contact assembly and both cooperate with the rocker arm. The first power moving contact assembly is connected to the shaft via the first tension spring, and the second power moving contact assembly is connected to the shaft via the second tension spring. The load terminal block is located inside the housing and is positioned to the right of the rocker arm. The first power moving contact assembly is connected to the load terminal block via the first wire, and the second power moving contact assembly is connected to the load terminal block via the second wire.

[0007] The first power stationary contact assembly and the second power stationary contact assembly are located on the left side of the rocker arm, with the first power stationary contact assembly positioned above the second power stationary contact assembly.

[0008] The operation handle is activated, which drives the rocker arm to rotate via the linkage, thereby causing the first power moving contact assembly to contact or separate from the first power stationary contact assembly, or causing the second power moving contact assembly to contact or separate from the second power stationary contact assembly.

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

[0010] The rocker arm has a second connecting part at one end near the load terminal block, and the connecting rod has a U-shaped structure. The two ends of the connecting rod are respectively connected to the first connecting part and the second connecting part.

[0011] In some embodiments, the rocker arm has a U-shaped structure, and the rocker arm 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 movable contact assembly has a U-shaped structure. The first power movable contact assembly includes a first main body, and 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 outside 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 portion of the shaft located between the first positioning plate and the second positioning plate. The first power movable contact assembly also includes a first contact portion connected to the first main body.

[0013] The second power moving contact assembly has a U-shaped structure. The second power moving contact assembly 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. The third side plate and the fourth side plate are respectively located outside 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 part connected to the second main body.

[0014] In some embodiments, the first main body is provided with a first through hole, 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 opposite sides of the first positioning plate and the second positioning plate are provided with a first protrusion and a second protrusion, and the top of the first protrusion and the second protrusion;

[0017] The second end of the first side plate and the second side plate is provided with a first recess that cooperates with the first protrusion, and the second end of the third side plate and the fourth side plate is provided with a second recess that cooperates with the second protrusion.

[0018] In some embodiments, the inner walls of the outer casing are provided with limiting grooves, and a limiting block is provided in the middle of the limiting groove. The limiting groove includes a first vertical side, a first inclined side, a second vertical side, and a second inclined side. The first vertical side and the first inclined side are located above the limiting block. The upper end of the first inclined side is connected to the lower end of the first vertical side, and the first inclined side extends inclinedly to the lower left.

[0019] The second vertical edge and the second inclined edge are located below the limiting 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 extends inclinedly to the upper left. The opposite sides of the first side plate and the second side plate are provided with first limiting posts. The first limiting posts are located in the limiting groove and can move along the first vertical edge and the first inclined edge. The opposite sides of the third side plate and the fourth side plate are provided with second limiting posts. The second limiting posts are located in the limiting 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 switchgear further includes an arc-extinguishing chamber; the arc-extinguishing chamber is installed inside the housing and is located between the first power stationary contact assembly and the second power stationary contact assembly.

[0022] In some embodiments, both the first conductor and the second conductor comprise flexible copper conductors.

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

[0024] The present invention has the following advantages: the main circuit device of the automatic transfer switch is small in size and relatively compact in structure, and can be used in household boxes. Moreover, the main circuit device of the automatic transfer switch is simple and convenient to operate and safe and reliable in performance. Attached Figure Description

[0025] To more clearly illustrate the technical solution of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:

[0026] Figure 1 This is a schematic diagram of the main circuit device of the automatic transfer switch appliance in some embodiments of this utility model;

[0027] Figure 2 This is a schematic diagram of the main circuit device of the automatic transfer switch appliance in a dual-position configuration in some embodiments of this utility model;

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

[0029] Figure 4 This is a schematic diagram of the main circuit device of the automatic transfer switch in some embodiments of the present invention in the II power supply closed position;

[0030] Figure 5 This 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 this utility model;

[0031] Figure 6 This is one of the structural schematic diagrams of the outer shell in some embodiments of this utility model;

[0032] Figure 7 This is the second schematic diagram of the outer shell in some embodiments of this utility model;

[0033] Figure 8 This is a partial structural schematic diagram of the main circuit device of the automatic transfer switch electrical appliance in some embodiments of this utility model;

[0034] Figure 9 This is a schematic diagram of the rocker arm in some embodiments of the present invention;

[0035] Figure 10 This is a schematic diagram of the structure of the first power moving contact assembly in some embodiments of the present invention;

[0036] Figure 11 This is a schematic diagram of the structure of the second power moving contact assembly in some embodiments of the present invention. Detailed Implementation

[0037] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0038] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0039] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0040] See Figures 1 to 5This utility model discloses a main circuit device for an automatic transfer switch, 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 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.

[0041] The operating handle 20 is rotatably mounted inside the housing 10. The rocker arm 50 is rotatably mounted inside the housing 10 via the shaft 40. The rocker arm 50 is located below the operating handle 20 and 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 inside the housing 10. 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 movable contact assembly 60 is connected to the shaft 40 via the first tension spring 90, and the second power movable contact assembly 70 is connected to the shaft 40 via the second tension spring 100; the load end terminal block 80 is disposed inside the housing 10 and located on the right side of the rocker arm 50; the first power movable contact assembly 60 is connected to the load end terminal block 80 via the first wire 110, and the second power movable contact assembly 70 is connected to the load end terminal block 80 via the second wire 120.

[0042] The first power stationary contact assembly 130 and the second power stationary contact assembly 140 are disposed on the left side of the rocker arm 50, with the first power stationary contact assembly 130 positioned above the second power stationary contact assembly 140. It should be noted that in this embodiment, the left side, right side, upper side, and lower side are defined by... Figures 2 to 5 It is defined by the orientation shown in the diagram.

[0043] When the operating handle 20 is activated, it drives the rocker arm 50 to rotate via the connecting rod 30, thereby causing the first power moving contact assembly 60 to contact or separate from the first power stationary contact assembly 130 to connect or disconnect the current from the first power stationary contact assembly 130, or causing the second power moving contact assembly 70 to contact or separate from the second power stationary contact assembly 140 to connect or disconnect the current from the second power stationary contact assembly 140.

[0044] like Figure 1As shown, in some embodiments, the operating handle 20 includes a handle body 21 and an operating part 22 connected to the handle body 21. The operating part 22 protrudes from the upper side of the housing 10 for user operation. The inner sidewall of the housing 10 is also provided with a mounting base 13. The handle body 21 is generally cylindrical and has a mounting groove that mates with the mounting base 13. Furthermore, the housing 10 also has a guide part 14, and the operating part 22 has a guide groove that mates with the guide part 14. The guide part 14 may be generally arc-shaped, and when the user operates the operating handle 20, the operating part 22 moves along the guide part 14. Furthermore, the handle body 21 is also provided with a first connecting part 23.

[0045] The rocker arm 50 has a second connecting portion 51 at one end near the load terminal block 80. The connecting rod 30 has a U-shaped structure, and its two ends are respectively connected to the first connecting portion 23 and the second connecting 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 via 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 has a U-shaped structure and includes a first positioning plate 52 and a second positioning plate 53 arranged parallel to each other. 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 passes through the first positioning plate 52 and the second positioning plate 53 to allow the rocker arm 50 to be rotatably mounted in the housing 10. The shaft 40 passes through the middle of the first positioning plate 52 and the second positioning plate 53 to allow the rocker arm 50 to be rotatably mounted in the housing 10. The middle of both 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. Figure 9 As shown, the left side of the first positioning plate 52 and the second positioning plate 53 is its first end, and the left side of the first positioning plate 52 and the second positioning plate 53 is its second end. The longitudinal dimension of the first positioning plate 52 and the second positioning plate 53 can gradually decrease from its first end to its second end.

[0048] like Figure 10As shown, in some embodiments, the first power moving contact assembly 60 has a U-shaped structure. The first power moving contact assembly 60 includes a first main body 61, with a first side plate 62 and a second side plate 63 respectively located on both sides of the first main body 61. The first side plate 62 and the second side plate 63 are located outside the first positioning plate 52 and the second positioning plate 53, respectively. 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 portion of the shaft 40 located between the first positioning plate 52 and the second positioning plate 53 (in conjunction with...). Figure 5 The first power moving contact assembly 60 further includes a first contact portion 64 connected to the first main body portion 61. Preferably, the first main body portion 61 is generally plate-shaped, and 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 disposed protruding from the second end of the first main body portion 61. 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 stationary contact assembly 130.

[0049] The second power moving contact assembly 70 has a U-shaped structure. The second power moving contact assembly 70 includes a second main body 71. A third side plate 72 and a fourth side plate 73 are respectively provided on both sides of the second main body 71. The third side plate 72 and the fourth side plate 73 are located outside the first positioning plate 52 and the second positioning plate 53, respectively. 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 (in combination). Figure 5 The second power moving contact assembly 70 also includes a second contact portion 74 connected to the second main body portion 71. Preferably, the second main body portion 71 is generally plate-shaped, and 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 provided protruding from the second end of the second main body portion 71. The second contact portion 74 is connected to the first end of the second main body portion 71 and is used to contact or separate from the second power stationary contact assembly 140.

[0050] Combination Figure 5 , Figure 10 and Figure 11 As shown, the first main body 61 has 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 has 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 opposite sides of the first positioning plate 52 and the second positioning plate 53 are each provided with a first protrusion 54 and a second protrusion 55, respectively. Above the first protrusion 54 and the second protrusion 55, the second ends of the first side plate 62 and the second side plate 63 are each provided with a first recess 65 that mates with the first protrusion 54. The second ends of the third side plate 72 and the fourth side plate 73 are each provided with a second recess 75 that mates with the second protrusion 55. The first protrusion 54 and the first recess 65 are connected by a pin-contact rotational connection, and similarly, the second protrusion 55 and the second recess 75 are connected by a pin-contact rotational connection. Preferably, the first protrusion 54 and the second protrusion 55 can be cylindrical structures, and the first recess 65 and the second recess 75 can include U-shaped grooves, C-shaped grooves, or arc-shaped grooves.

[0052] Combination Figure 6 and Figure 7 As shown, in some embodiments, the inner walls of the outer casing 10 are provided with limiting grooves 11. The limiting grooves 11 are located near the first power stationary contact assembly 130 or the second power stationary contact assembly 140. A limiting block 12 is provided in the middle of the limiting groove 11. The upper and lower surfaces of the limiting block 12 are both planar. 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. The upper end of the first inclined edge 11b is connected to the lower end of the first vertical edge 11a. The first inclined edge 11b extends inclinedly to the lower left. 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 limiting block 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 extends inclined to 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. The limiting block 12 may be located at the connection between the first inclined edge 11b and the second inclined edge 11d. A second limiting groove b is formed at the connection between the lower end of the second vertical edge 11c and the upper end of the second inclined edge 11d.

[0054] The first side plate 62 and the second side plate 63 are provided with first limiting posts 66 on opposite sides. The first limiting posts 66 are 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 second limiting posts 76 on opposite sides. The second limiting posts 76 are located in the limiting groove 11 and can move along the second vertical edge 11c and the second inclined edge 11d.

[0055] like Figure 10 and Figure 11 As shown, in some embodiments, 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.

[0056] like Figures 1 to 5 As shown, in some embodiments, the main circuit device of the automatic transfer switchgear further includes an arc-extinguishing chamber 150; the arc-extinguishing chamber 150 is installed inside the housing 10 and is located between the first power stationary contact assembly 130 and the second power stationary 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 conductor 110 can be soldered to the first power moving contact assembly 60 and the load terminal block 80, respectively. The two ends of the second conductor 120 can be soldered to the second power moving contact assembly 70 and the load terminal block 80, respectively. Preferably, both the first conductor 110 and the second conductor 120 are made of copper flexible wire.

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

[0059] The main circuit device of this 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 split position, and the rocker arm 50 is also in the split position under the action of the connecting rod 30. The first recess 65 on the first power moving contact assembly 60 and the shaft 40 are supported by the tension of the first tension spring 90, so that the first limiting post 66 on the first power moving contact assembly 60 and the first limiting groove a on the limiting groove 11 on the housing 10 are limited and supported, thereby maintaining the split position. The second recess 75 on the second power moving contact assembly 70 and the shaft 40 are supported by the tension of the second tension spring 100, so that the second limiting post 76 on the second power moving contact assembly 70 and the second limiting groove b on the limiting groove 11 on the housing 10 are limited and supported, thereby maintaining the split position.

[0061] Combination Figure 2 , Figure 3 , Figure 6 and Figure 7As shown, when the operating handle 20 rotates counterclockwise from the double-position, the rocker arm 50 also moves counterclockwise upward. The first concave portion 65 of the first power moving contact assembly 60 is pressed downward by the first convex portion 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 an upward supporting force from the limiting block 12. Under the combined action of this force, the first power moving contact assembly 60 rotates upward through its first concave portion 65 around the first convex portion 54 on the rocker arm 50. When the tension direction of the first tension spring 90 passes the first convex portion 54 of the rocker arm 50, the first power moving contact assembly 60 quickly rotates upward under the action of the tension spring 90 and contacts the first power stationary contact assembly 130 to close the circuit. Similarly, When the operating handle 20 is rotated clockwise from the I power closed position, the rocker arm 50 also moves clockwise downwards. The first concave portion 65 of the first power moving contact assembly 60 is pressed upwards by the first convex portion 54 of the rocker arm 50. At the same time, the first power moving contact assembly 60 is supported downwards by the first power stationary contact assembly 130. Under the combined force, the first power moving contact assembly 60 rotates downwards around the first convex portion 54 on the rocker arm 50 through its first concave portion 65. When the tension direction of the first tension spring 90 passes the first convex portion 54 of the rocker arm 50, the first power moving contact assembly 60 quickly rotates downwards away from the first power stationary contact assembly 130 under the tension 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, when the operating handle 20 rotates clockwise from the double-position, the rocker arm 50 also moves clockwise downwards. The second recess 75 of the second power moving contact assembly 70 is pressed upwards 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 a downward supporting force from the limiting block 12. Under the combined force, the second power moving contact assembly 70 rotates downwards through its second recess 75 around the second protrusion 55 on the rocker arm 50. When the tension direction of the second tension spring 100 passes the second protrusion 55 of the rocker arm 50, the second power moving contact assembly 70 quickly rotates downwards under the tension of the second tension spring 100 and contacts the second power stationary contact assembly 140 to close the circuit. Similarly, when... When the operating handle 20 is rotated counterclockwise from the II power supply closed position, the rocker arm 50 also moves counterclockwise upward. The second recess 75 of the second power supply moving contact assembly 70 is pressed downward by the second protrusion 55 of the rocker arm 50. At the same time, the second power supply moving contact assembly 70 is supported upward by the second power supply stationary contact assembly 140. Under the action of this combined force, the second power supply moving contact assembly 70 rotates upward around the second protrusion 55 on the rocker arm 50 through its second recess 75. When the tension direction of the second tension spring 100 passes the second protrusion 55 of the rocker arm 50, the second power supply moving contact assembly 70 quickly rotates upward away from the second power supply stationary contact assembly 140 under the action of the tension of the second tension spring 100, thereby realizing the opening of the II power supply.

[0063] The main circuit device of this automatic transfer switch is small in size and relatively compact in structure. It is suitable for use in household indoor boxes and can be installed on a DIN rail. Furthermore, the main circuit device of this automatic transfer switch is simple and convenient to operate and has safe and reliable performance.

[0064] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A main circuit device for an automatic transfer switchgear, characterized in that, It includes 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 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 inside the housing (10). The rocker arm (50) is rotatably mounted inside the housing (10) via the shaft (40). The rocker arm (50) is located below the operating handle (20) and 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 inside the housing (10). The first power moving contact assembly (60) is located above the second power moving contact assembly (70) and is connected to the rocker arm (50). In this configuration, the first power moving contact assembly (60) is connected to the shaft (40) via the first tension spring (90), and the second power moving contact assembly (70) is connected to the shaft (40) via the second tension spring (100); the load end terminal block (80) is located inside the housing (10) and positioned 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) via the first wire (110), and the second power moving contact assembly (70) is connected to the load end terminal block (80) via the second wire (120); The first power stationary contact assembly (130) and the second power stationary contact assembly (140) are located on the left side of the rocker arm (50), with the first power stationary contact assembly (130) located above the second power stationary contact assembly (140). When the operating handle (20) is activated, the rocker arm (50) is rotated via the connecting rod (30) to cause the first power moving contact assembly (60) to contact or separate from the first power stationary contact assembly (130), or to cause 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, characterized in that, The operating handle (20) includes a handle body (21) and an operating part (22) connected to the handle body (21). The operating part (22) protrudes from the upper side of the outer shell (10). The handle body (21) is also provided with a first connecting part (23). The rocker arm (50) has a second connecting part (51) at one end near the load terminal block (80), and the connecting rod (30) has a U-shaped structure. The two ends of the connecting rod (30) are respectively connected to the first connecting part (23) and the second connecting part (51).

3. The main circuit device of the automatic transfer switch according to claim 1, characterized in that, The rocker arm (50) has a U-shaped structure. The rocker arm (50) includes a first positioning plate (52) and a second positioning plate (53) arranged in parallel and spaced apart. The second ends of the first positioning plate (52) and the second positioning plate (53) are connected together. 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) has a U-shaped structure. The first power moving contact assembly (60) includes a first main body (61), and a first side plate (62) and a second side plate (63) are respectively provided on both sides of the first main body (61). The first side plate (62) and the second side plate (63) are respectively located outside 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). The first power moving contact assembly (60) also includes a first contact part (64) connected to the first main body (61). The second power moving contact assembly (70) has 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 its two sides respectively. The third side plate (72) and the fourth side plate (73) are located on the outside of the first positioning plate (52) and the second positioning plate (53) respectively. 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). The second power moving contact assembly (70) also includes a second contact part (74) connected to the second main body (71).

4. The main circuit device of the automatic transfer switch according to claim 3, characterized in that, The first main body (61) is provided with a first through hole (611), and the first end of the first tension spring (90) is connected to the first through hole (611); The second main body (71) is provided with a second through hole (711), 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 according to claim 3, characterized in that, The first positioning plate (52) and the second positioning plate (53) are provided with a first protrusion (54) and a second protrusion (55) on opposite sides, and the first protrusion (54) and the second protrusion (55) are located above the first protrusion (54) and the second protrusion (55); The second ends of the first side plate (62) and the second side plate (63) are provided with a first recess (65) that cooperates with the first protrusion (54), and the second ends of the third side plate (72) and the fourth side plate (73) are provided with a second recess (75) that cooperates with the second protrusion (55).

6. The main circuit device of the automatic transfer switch according to claim 3, characterized in that, The outer shell (10) is provided with limiting grooves (11) on its opposite inner sidewalls. A limiting block (12) is provided in the middle of the limiting groove (11). The limiting groove (11) includes a first vertical side (11a), a first inclined side (11b), a second vertical side (11c), and a second inclined side (11d). The first vertical side (11a) and the first inclined side (11b) are located above the limiting block (12). The upper end of the first inclined side (11b) is connected to the lower end of the first vertical side (11a). The first inclined side (11b) extends inclinedly to 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). The second inclined edge (11d) extends inclinedly to the upper left. The opposite sides of the first side plate (62) and the second side plate (63) are provided with first limiting posts (66). The first limiting posts (66) are located in the limiting groove (11) and can move along the first vertical edge (11a) and the first inclined edge (11b). The opposite sides of the third side plate (72) and the fourth side plate (73) are provided with second limiting posts (76). The second limiting posts (76) are 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 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 also includes an arc-extinguishing chamber (150); the arc-extinguishing chamber (150) is installed inside the housing (10) and is located between the first power stationary contact assembly (130) and the second power stationary contact assembly (140).

9. The main circuit device of the automatic transfer switch according to claim 1, characterized in that, Both the first conductor (110) and the second conductor (120) consist of copper flexible conductors.

10. The main circuit device of the automatic transfer switch according to claim 1, characterized in that, The outer casing (10) includes a first casing (10a) and a second casing (10b) that are detachably connected.

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