Moving contact system and circuit breaker

Abstract

The utility model provides a moving contact system and a circuit breaker, and relates to the technical field of electrical equipment. The moving contact system comprises a pivot, a transmission member and a moving contact assembly. The transmission part is provided with a first end and a second end which are opposite. The first end is rotatably connected with the pivot. The moving contact assembly is located on the side, away from the pivot, of the transmission part. The side, close to the transmission part, of the moving contact assembly is rotationally connected with the second end. According to the moving contact system, the opening distance between the moving contact assembly and the static contact assembly can be increased, and the insulation performance and the breaking capacity of the circuit breaker comprising the moving contact system can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment, and in particular to a moving contact system and a circuit breaker. Background Art

[0002] The circuit breaker includes a moving contact assembly, a stationary contact assembly and a pivot. The pivot is rotatably connected to the moving contact assembly. The pivot can drive the moving contact assembly to rotate so that the moving contact assembly contacts or separates from the stationary contact assembly, thereby realizing the closing or opening of the circuit breaker.

[0003] In the related art, the structural design of the moving contact assembly is unreasonable, resulting in low insulation performance and breaking capacity of the circuit breaker including the moving contact assembly. Utility Model Content

[0004] The present application provides a moving contact system and a circuit breaker to improve the insulation performance and breaking capacity of the circuit breaker.

[0005] In a first aspect, the present application provides a moving contact system, comprising a pivot, a transmission member, and a moving contact assembly. The transmission member has a first end and a second end opposite to each other, and the first end is rotatably connected to the pivot. The moving contact assembly is located on a side of the transmission member away from the pivot, and a side of the moving contact assembly close to the transmission member is rotatably connected to the second end.

[0006] Through the above arrangement, when the circuit breaker is closed or opened, the pivot can rotate and drive the transmission member to rotate through the first end. At the same time, the second end of the transmission member rotates accordingly and drives the moving contact assembly to rotate, so that the moving contact assembly can contact or separate from the static contact assembly. In the present application, the moving contact assembly itself can serve as a connecting rod. Thus, the pivot, the transmission member and the moving contact assembly can form a multi-link mechanism, increasing the stroke of the moving contact assembly when the circuit breaker is closed and opened. Thus, the opening distance of the moving contact assembly and the static contact assembly can be increased, which is beneficial to improving the insulation performance and breaking capacity of the circuit breaker including the above-mentioned moving contact system.

[0007] Optionally, the moving contact assembly includes a moving contact and a support body. The moving contact is mounted on a side of the support body away from the transmission member, and the moving contact can rotate relative to the support body. A side of the support body close to the transmission member is rotatably connected to the second end.

[0008] Based on the above arrangement, the connection between the transmission member and the moving contact assembly can be realized through the support body. Since the side of the support body close to the transmission member can be rotatably connected to the second end, the rotation of the moving contact far from the transmission member and the rotation of the support body and the second end can be made non-coaxial. Furthermore, the part between the position where the second end is set on the support body and the position where the moving contact is rotatably connected on the support body can be used as a connecting rod to form a multi-link mechanism together with the pivot and the transmission member, thereby increasing the stroke of the moving contact assembly when the circuit breaker is closed and opened.

[0009] Optionally, a first rotating hole is provided on one side of the support body close to the transmission member, and a second rotating hole is provided on the second end. The first rotating hole and the second rotating hole are opposite to each other, and a first main shaft is passed through the first rotating hole and the second rotating hole, and the first main shaft can rotate relative to the first rotating hole and the second rotating hole.

[0010] Through the above solution, the first main shaft can be inserted into the first rotating hole and the second rotating hole, and the first main shaft can rotate in the first rotating hole and the second rotating hole to achieve the rotational connection between the support body and the transmission member.

[0011] Optionally, a first fixing plate and a second fixing plate are arranged at intervals on one side of the support body close to the transmission member, and the first fixing plate is opposite to the second fixing plate. The second end is located between the first fixing plate and the second fixing plate, and the first fixing plate and the second fixing plate are both rotatably connected to the second end.

[0012] Through the above solution, the first fixing plate and the second fixing plate can be rotatably connected to the support body. In addition, the first fixing plate and the second fixing plate also have a limiting effect on the second end, which can prevent the second end from moving along the axial direction of the first main shaft and causing the second end to fall off.

[0013] Optionally, a fixing member is provided on one side of the support body close to the transmission member, a limiting groove is provided on the second end, the fixing member is embedded in the limiting groove and is rotatably connected to the second end.

[0014] Through the above solution, the rotation connection between the fixing member and the support body can be realized. In addition, the limiting groove also has a limiting effect on the fixing member, which can prevent the fixing member from moving along the axial direction of the first main shaft and causing the fixing member to fall off.

[0015] Optionally, the pivot includes a body and a cantilever connected to each other, the cantilever is located on a side of the body close to the transmission member, and a third rotation hole is provided on the cantilever. A fourth rotation hole is provided at the first end, the third rotation hole and the fourth rotation hole are opposite, a second main shaft is passed through the third rotation hole and the fourth rotation hole, and the second main shaft can rotate relative to both the third rotation hole and the fourth rotation hole.

[0016] Through the above arrangement, the pivot can be connected to the first end via the cantilever, so that when the body rotates, the cantilever can rotate with the body, and then the first end can rotate relative to the second main axis.

[0017] Optionally, a receiving groove is further provided on one side of the cantilever facing the transmission member, and the receiving groove is communicated with the third rotating hole. The first end is embedded in the receiving groove.

[0018] By providing a receiving groove for embedding the first end on the cantilever, the cantilever can have a limiting effect on the first end, which can prevent the first end from moving along the axial direction of the second main axis and causing the first end to fall off, thereby preventing the transmission member from being disconnected from the cantilever.

[0019] Optionally, the support body includes a first mounting plate, a second mounting plate and a third mounting plate, the second mounting plate and the third mounting plate are opposite and spaced apart, the first mounting plate is connected between the second mounting plate and the third mounting plate, the first mounting plate, the second mounting plate and the third mounting plate are enclosed to form an installation space, the moving contact is at least partially arranged in the installation space and is located on a side of the first mounting plate away from the transmission member. The side of the first mounting plate close to the transmission member is rotatably connected to the second end.

[0020] With such arrangement, an installation space for installing the moving contact can be formed inside the support body, which can facilitate the installation of the moving contact. When connecting the moving contact, the second installation plate and the third installation plate can be used as clamping plates to fix the moving contact.

[0021] Optionally, part of the first mounting plate extends outward from the second mounting plate, and a limiting hole is provided on part of the first mounting plate extending outward from the second mounting plate. The moving contact assembly also includes a support member, a contact mounting position is provided on the support member, the moving contact is installed at the contact mounting position, the support member is at least partially provided in the installation space, and is located on a side of the first mounting plate away from the transmission member, and the second mounting plate and the third mounting plate are both in contact with the support member. A clamping structure is provided on the side of the support member facing the first mounting plate, and the clamping structure is embedded in the limiting hole.

[0022] Through the provision of this embodiment, a portion of the first mounting plate can be made higher than the second mounting plate, so that the support member can be installed through this portion of the first mounting plate. A clamping structure is provided on the support member, and a limiting hole is provided on the portion of the first mounting plate extending outward from the second mounting plate. The clamping structure can be embedded in the limiting hole to connect the support member to the first mounting plate. With such a configuration, the second mounting plate and the third mounting plate can support the support member. It can be avoided that the force exerted by the support member on the support body is concentrated on the clamping structure and the limiting hole, which causes the clamping structure or the limiting hole to be easily damaged by force.

[0023] In a second aspect, the present application provides a circuit breaker, comprising any moving contact system in the above-mentioned first aspect.

[0024] The beneficial effects provided in the above-mentioned second aspect and various possible designs of the above-mentioned second aspect can refer to the beneficial effects brought about by the above-mentioned first aspect and various possible implementation methods of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1This is a schematic structural diagram of a moving contact system according to an embodiment of the present application.

[0026] Figure 2 This is a schematic diagram of the structure of a transmission component according to an embodiment of the present application.

[0027] Figure 3 It is a side view of a moving contact system according to an embodiment of the present application.

[0028] Figure 4 This is a schematic structural diagram of a support body according to an embodiment of the present application.

[0029] Figure 5 This is a schematic diagram of the structure of a pivot according to an embodiment of the present application.

[0030] Description of reference numerals:

[0031] 100: moving contact system; 10: pivot; 20: transmission member; 21: first end; 22: second end; 30: moving contact assembly; 31: moving contact; 32: support body; 321: first rotating hole; 221: second rotating hole; 40: first main shaft; 322: first fixed plate; 323: second fixed plate; 11: body; 12: cantilever; 121: third rotating hole; 211: fourth rotating hole; 50: second main shaft; 122: accommodating groove; 324: first mounting plate; 325: second mounting plate; 326: third mounting plate; 327: mounting space; 328: limiting hole; 33: support member; 60: rotating shaft; 70: retaining ring; 71: retaining spring; 3251: fifth rotating hole; 34: conductive sheet. DETAILED DESCRIPTION

[0032] In this application, "at least one" means one or more, and "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c alone can represent: a, b, c, a and b, a and c, or a, b, and c, where a, b, and c can be single or multiple. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0033] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "up", "down", "left", "right", "front", and "back" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0034] The terms "connected" and "connected" should be understood in a broad sense. For example, the "connected" or "connected" of a circuit structure can refer to not only physical connection, but also electrical connection or signal connection. For example, it can be directly connected, that is, physically connected, or indirectly connected through at least one intermediate element, as long as the circuit is connected. It can also be the internal connection of two elements. In addition to signal connection through circuits, signal connection can also refer to signal connection through media media, such as radio waves. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] Figure 1 FIG. 1 is a schematic diagram of a structure of a moving contact system of an embodiment of the present application. The embodiment of the present application provides a circuit breaker, and the circuit breaker includes: Figure 1 The moving contact system 100 shown can realize closing or opening of the circuit breaker by driving the moving contact system 100 to rotate.

[0036] The circuit breaker is arranged on the main circuit and is used to connect or disconnect the main circuit.

[0037] The circuit breaker also includes a static contact assembly, which is used to cooperate with the moving contact system 100. When the circuit breaker is closed, the moving contact system 100 rotates and contacts the static contact assembly to conduct the main circuit. When the circuit breaker is opened, the moving contact system 100 rotates and separates from the static contact assembly to disconnect the main circuit.

[0038] The moving contact system provided in the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0039] refer to Figure 1 and Figure 2 The present application proposes a moving contact system 100, comprising a pivot 10, a transmission member 20 and a moving contact assembly 30. The transmission member 20 has a first end 21 and a second end 22 opposite to each other, and the first end 21 is rotatably connected to the pivot 10. The moving contact assembly 30 is located on a side of the transmission member 20 away from the pivot 10, and a side of the moving contact assembly 30 close to the transmission member 20 is rotatably connected to the second end 22.

[0040] In the embodiment of the present application, the moving contact system 100 includes a pivot 10, a transmission member 20, and a moving contact assembly 30. The pivot 10 and the moving contact assembly 30 can be connected through the transmission member 20, so that the pivot 10 can drive the moving contact assembly 30 to rotate through the transmission member 20, so that the moving contact assembly 30 can contact or separate with the static contact assembly to achieve the closing or opening of the circuit breaker.

[0041] The moving contact assembly 30 is located on a side of the transmission member 20 away from the pivot 10, so the transmission member 20 is located between the transmission member 20 and the moving contact assembly 30. The transmission member 20 has a first end 21 and a second end 22 opposite to each other. When the pivot 10 and the moving contact assembly 30 are connected, the first end 21 can be rotatably connected to the pivot 10, and the second end 22 can be rotatably connected to the moving contact assembly 30.

[0042] When the circuit breaker is closed or opened, the pivot 10 can rotate and drive the transmission member 20 to rotate through the first end 21. At the same time, the second end 22 rotates with the first end 21 to drive the moving contact assembly 30 to rotate, so that the moving contact assembly 30 can contact or separate from the static contact assembly. Since the side of the moving contact assembly 30 close to the transmission member 20 is rotatably connected to the second end 22, the moving contact assembly 30 itself can serve as a connecting rod. Therefore, the pivot 10, the transmission member 20 and the moving contact assembly 30 can form a multi-link mechanism, increasing the stroke of the moving contact assembly 30 when the circuit breaker is closed and opened.

[0043] In this way, when the circuit breaker switches from the closed state to the open state, the stroke of the moving contact assembly 30 can be increased, thereby increasing the opening distance between the moving contact assembly 30 and the static contact assembly, which is beneficial to improving the insulation performance and breaking capacity of the circuit breaker including the above-mentioned moving contact system 100.

[0044] In the related art, the pivot 10 is connected to the moving contact assembly 30 through a connecting rod. The moving contact assembly 30 also includes a rotatable moving contact 31. Since the moving contact 31 needs to cooperate with the static contact assembly away from the pivot 10, the moving contact 31 will be rotatably connected to the side of the moving contact assembly 30 away from the pivot 10. When the connecting rod is connected to the moving contact assembly 30, the connecting rod will also be connected to the side of the moving contact assembly 30 away from the pivot 10, and will be coaxially arranged with the moving contact 31. When the circuit breaker is closed or opened, the pivot 10 drives the moving contact assembly 30 to rotate through the connecting rod. During the rotation of the moving contact assembly 30, the moving contact assembly 30 rotates around the pivot 10, and the distance between the rotation center of the moving contact assembly 30 and the rotation center of the pivot 10 is the length of the connecting rod.

[0045] In the design of the above-mentioned related art, the rotation of the moving contact assembly 30 is actually moving on an arc with the connecting rod as the radius. That is, the moving contact assembly 30 moves along the circumference of the arc, and in the radial direction of the arc, the connecting rod restricts the movement of the moving contact assembly 30. This makes the stroke of the moving contact assembly 30 smaller in a certain space, so that the insulation performance and breaking capacity of the circuit breaker equipped with such a moving contact assembly 30 are lower.

[0046] In the present application, since the second end 22 of the transmission member 20 is connected to the side of the moving contact assembly 30 close to the transmission member 20, the connection position of the transmission member 20 and the moving contact assembly 30 and the rotation center of the moving contact assembly 30 are two different positions. Therefore, the transmission member 20 can be used as a connecting rod, and the side of the moving contact assembly 30 close to the transmission member 20 to the side away from the transmission member 20 can also be used as a connecting rod, so that the pivot 10, the transmission member 20 and the moving contact assembly 30 form a multi-link mechanism.

[0047] Through the above arrangement, when the circuit breaker is closed or opened, the pivot 10 rotates as a driving member, and at this time, the transmission member 20 rotates around the first end 21, and the moving contact assembly 30 rotates around the second end 22.

[0048] That is, when the circuit breaker is closed or opened, the pivot 10 can drive the transmission member 20 to rotate through the first end 21, and drive the moving contact assembly 30 to rotate through the second end 22. For details, please refer to the following description.

[0049] For example, assuming that when the circuit breaker is opened, Figure 1 Taking the placement position shown as an example, the pivot 10 rotates clockwise. At this time, the rotation of the transmission member 20 causes the first end 21 to move downward and the second end 22 to move upward. At the same time, the moving contact assembly 30 can rotate relative to the second end 22. In this process, the rotation of the transmission member 20 can cause the moving contact assembly 30 to rotate around the second end 22 while also moving in a direction close to the pivot 10, which can increase the opening stroke of the moving contact assembly 30 and improve the opening distance between the moving contact assembly 30 and the static contact assembly.

[0050] Assuming that when the circuit breaker is closed, the pivot 10 rotates counterclockwise, at this time, the rotation of the transmission member 20 causes the first end 21 to move upward and the second end 22 to move downward. At the same time, the moving contact assembly 30 can rotate relative to the second end 22. In this process, the rotation of the transmission member 20 can cause the moving contact assembly 30 to rotate around the second end 22 while also moving away from the pivot 10, which can increase the closing stroke of the moving contact assembly 30 so that the moving contact assembly 30 can contact the static contact assembly.

[0051] According to the above analysis, compared with the solution in the related art in which the connecting rod limits the radial movement of the movable contact assembly 30 , the movable contact assembly 30 proposed in the present application can move close to the pivot 10 or move away from the pivot 10 .

[0052] In other words, when the circuit breaker is opened, the transmission member 20 can be retracted, so that the moving contact 31 rotates and moves in a direction close to the pivot 10. When the circuit breaker is closed, the transmission member 20 can be unfolded, so that the moving contact 31 rotates and moves in a direction away from the pivot 10. Therefore, the arrangement of the transmission member 20 can increase the range of motion of the moving contact assembly 30, increase the closing stroke and opening stroke of the moving contact assembly 30, and thus increase the opening distance between the moving contact assembly 30 and the static contact assembly.

[0053] Of course, the actions of closing and opening the circuit breaker may also be different from the above process. For example, when the circuit breaker is opened, the pivot 10 may rotate counterclockwise, and when the circuit breaker is closed, the pivot 10 may rotate counterclockwise. The arrangement may be made according to the arrangement of other components in the circuit breaker.

[0054] For example, the circuit breaker is also provided with an operating mechanism for driving the pivot 10 to rotate, a locking mechanism for maintaining a closed state or an open state, etc. The specific actions of closing and opening the circuit breaker can be set according to the settings of the operating mechanism and the locking mechanism.

[0055] In some embodiments, Figure 1 and Figure 3 As shown, the moving contact assembly 30 may include a moving contact 31 and a support body 32. The moving contact 31 is mounted on a side of the support body 32 away from the transmission member 20, and the moving contact 31 can rotate relative to the support body 32. The side of the support body 32 close to the transmission member 20 is rotatably connected to the second end 22.

[0056] The moving contact assembly 30 includes a moving contact 31 and a support body 32, wherein the moving contact 31 is used to cooperate with the static contact assembly to contact the static contact assembly when the circuit breaker is closed. The support body 32 can provide an installation position for the moving contact 31 to achieve the installation of the moving contact 31. Since the moving contact 31 is installed on the side of the support body 32 away from the transmission member 20, the moving contact assembly 30 can be located on the side facing the static contact assembly so that the moving contact assembly 30 contacts the static contact assembly.

[0057] In the present application, the side of the support body 32 close to the transmission member 20 is rotatably connected to the second end 22, so that the rotation of the moving contact 31 away from the transmission member 20 and the rotation of the support body 32 and the second end 22 are not coaxial. Therefore, the part between the position where the second end 22 is set on the support body 32 and the position where the moving contact 31 is connected on the support body 32 can be used as a connecting rod, and together with the pivot 10 and the transmission member 20, a multi-link mechanism is formed to increase the stroke of the moving contact assembly 30 when the circuit breaker is closed and opened.

[0058] In addition, connecting the transmission member 20 to a side of the support body 32 close to the transmission member 20 can also avoid the problem that the transmission member 20 occupies space in the thickness direction of the moving contact system 100 .

[0059] Among them, Figure 1 As shown, the movable contact 31 includes a plurality of conductive sheets 34 , each of which is provided with a contact point, and the movable contact 31 can contact with the stationary contact assembly through the contact point. The thickness direction of the movable contact system 100 is the distribution direction of the plurality of conductive sheets 34 .

[0060] It can be understood that, in the setting of the present application, the moving contact 31 is located on the side of the support body 32 away from the transmission member 20, and the transmission member 20 is located on the side of the support body 32 close to the support body 32. Such a setting can avoid the transmission member 20 also being connected to the side of the support body 32 away from the transmission member 20, occupying the setting space of the moving contact 31. That is, the setting of the transmission member 20 in the present application can save the space on the side of the moving contact assembly 30 away from the transmission member 20. Therefore, the saved space can be used to increase the width of the conductive sheet 34 and / or the number of the conductive sheets 34. Under a certain space, the short-time current withstand capability of the main circuit can be improved and the temperature rise of the main circuit circuit can be reduced.

[0061] The width of the conductive sheet 34 refers to the size of two opposite ends of any conductive sheet 34 in the distribution direction of the plurality of conductive sheets 34 .

[0062] It should be noted that the rotating shaft 60 may be provided through the side of the support body 32 away from the transmission member 20. When the moving contact 31 is installed, the rotating shaft 60 is also provided through the moving contact 31 to achieve the rotation connection of the moving contact 31.

[0063] In addition, a contact spring may be provided between the moving contact 31 and the support body 32. During the closing process, when the moving contact 31 contacts the stationary contact assembly, the transmission member 20 may continue to drive the support body 32 to rotate. At this time, the stationary contact assembly provides a reaction force to the moving contact 31 and compresses the contact spring, so that the moving contact 31 can rotate around the rotating shaft 60 relative to the support body 32. The contact spring may provide a force toward the stationary contact assembly to the moving contact 31, so that the moving contact 31 can reliably contact the stationary contact assembly.

[0064] In some embodiments, Figure 2 , Figure 3 and Figure 4 As shown, a first rotation hole 321 is provided on one side of the support body 32 close to the transmission member 20, and a second rotation hole 221 is provided on the second end 22. The first rotation hole 321 and the second rotation hole 221 are opposite to each other, and a first main shaft 40 can be passed through the first rotation hole 321 and the second rotation hole 221, and the first main shaft 40 can rotate in the first rotation hole 321 and the second rotation hole 221, so as to realize the rotation connection between the support body 32 and the transmission member 20.

[0065] The support body 32 and the second end 22 may have different settings to achieve the rotational connection between the support body 32 and the second end 22, and the following two examples are used for illustration:

[0066] Method 1: If Figures 2 to 4 As shown, a first fixing plate 322 and a second fixing plate 323 are arranged at intervals on one side of the support body 32 close to the transmission member 20, and the first fixing plate 322 is opposite to the second fixing plate 323. The second end 22 is located between the first fixing plate 322 and the second fixing plate 323, and the first fixing plate 322 and the second fixing plate 323 are both rotatably connected to the second end 22.

[0067] Since the first fixing plate 322 and the second fixing plate 323 are spaced apart, a space for arranging the second end 22 can be formed between the first fixing plate 322 and the second fixing plate 323. When connecting the second end 22, the second end 22 can be embedded between the first fixing plate 322 and the second fixing plate 323, and the first fixing plate 322 and the second fixing plate 323 are both rotatably connected to the second end 22.

[0068] The first fixing plate 322 and the second fixing plate 323 may both be provided with a first rotation hole 321. Figure 4 The second rotation hole 221 can be arranged at the second end 22, as shown. Figure 2 The first main shaft 40 may be sequentially disposed through the first rotation hole 321 on the first fixing plate 322 , the second rotation hole 221 , and the first rotation hole 321 on the second fixing plate 323 .

[0069] With such arrangement, in addition to realizing the rotational connection between the support body 32 and the second end 22, the first fixing plate 322 and the second fixing plate 323 also have a limiting effect on the second end 22, thereby preventing the second end 22 from moving along the axial direction of the first main shaft 40 and causing the second end 22 to fall off.

[0070] It should be noted that, in order to enhance the limiting effect on the second end 22 and prevent the second end 22 from moving along the axial direction of the first main shaft 40, a retaining ring 70 may be provided on the first main shaft 40. Figure 1 , a retaining ring 70 can be provided on both sides of the second end 22. The retaining ring 70 located between the second end 22 and the first fixing plate 322 has one end abutting against the transmission member 20, and the other end abutting against the first fixing plate 322. The retaining ring 70 located between the second end 22 and the second fixing plate 323 has one end abutting against the transmission member 20, and the other end abutting against the second fixing plate 323.

[0071] Alternatively, the second end 22 may be in contact with the first fixing plate 322, a retaining ring 70 may be disposed between the second end 22 and the second fixing plate 323, and both ends of the retaining ring 70 may be respectively in contact with the second end 22 and the second fixing plate 323. The specific arrangement of the retaining ring 70 is not specifically limited in the present embodiment.

[0072] It should also be noted that, in order to prevent the first main shaft 40 from moving along its axial direction, a retaining spring 71 may be provided at both ends of the first main shaft 40. Figure 1 When the clamping spring 71 is provided, the clamping spring 71 can be in contact with the first fixing plate 322 and the second fixing plate 323 respectively.

[0073] Mode 2: A fixing member is disposed on one side of the support body 32 close to the transmission member 20 , a limiting groove is disposed on the second end 22 , the fixing member is embedded in the limiting groove and is rotatably connected to the second end 22 .

[0074] Since the second end 22 is provided with a limiting groove, the limiting groove can form a space for arranging a fixing member. When connecting the second end 22 and the support body 32, the fixing member can be embedded in the limiting groove, and the fixing member and the second end 22 are rotatably connected.

[0075] The first rotation hole 321 can be provided on the fixing member, and the second rotation hole 221 can be provided on the second end 22 and communicate with the limiting groove. Thus, when the fixing member is embedded in the limiting groove, the first rotation hole 321 can be opposite to the second rotation hole 221. The first main shaft 40 can pass through the first rotation hole 321 and the second rotation hole 221 and penetrate the fixing member and the second end 22.

[0076] Such arrangement, in addition to realizing the rotational connection between the support body 32 and the second end 22 , also has a limiting effect on the fixing member, thereby preventing the fixing member from moving along the axial direction of the first main shaft 40 and causing the fixing member to fall off.

[0077] It is understandable that, in order to prevent the fixing member and the first spindle 40 from moving, a retaining ring 70 may be provided to limit the fixing member, and a retaining spring 71 may be provided to limit the first spindle 40. For details, reference may be made to the description in the above-mentioned method 1, and the embodiment of the present application is not specifically limited here.

[0078] Of course, in addition to the above-mentioned method 1 and method 2, the rotational connection between the support body 32 and the second end 22 can also be achieved by other methods. For example, the end of the support body 32 close to the transmission member 20 and the second end 22 can be arranged adjacent to each other along the axis direction of the first main shaft 40. The first main shaft 40 can be sequentially inserted into the support body 32 and the second end 22 to achieve the rotational connection between the two. The specific method of the rotational connection between the support body 32 and the second end 22 is not specifically limited in the embodiment of the present application.

[0079] In some embodiments, Figure 2 , Figure 3 and Figure 5 As shown, the pivot 10 may include a body 11 and a cantilever 12 connected to each other, the cantilever 12 is located on a side of the body 11 close to the transmission member 20, and a third rotation hole 121 is provided on the cantilever 12. A fourth rotation hole 211 is provided at the first end 21, the third rotation hole 121 and the fourth rotation hole 211 are opposite, a second main shaft 50 is passed through the third rotation hole 121 and the fourth rotation hole 211, and the second main shaft 50 can rotate relative to the third rotation hole 121 and the fourth rotation hole 211.

[0080] The pivot 10 includes a body 11 and a cantilever 12, wherein the cantilever 12 is close to the transmission member 20, and the body 11 is far from the transmission member 20, and the pivot 10 and the first end 21 can be connected by the cantilever 12. Specifically, the cantilever 12 can be provided with a third rotation hole 121, and the first end 21 can be provided with a fourth rotation hole 211. The second main shaft 50 is penetrated in the third rotation hole 121 and the fourth rotation hole 211, and can rotate relative to the third rotation hole 121 and the fourth rotation hole 211. Therefore, when the body 11 rotates, the cantilever 12 can rotate with the body 11, and then the first end 21 can rotate relative to the second main shaft 50.

[0081] In some embodiments, Figure 2 and Figure 5 As shown, a receiving groove 122 may be further provided on one side of the cantilever 12 facing the transmission member 20 , and the receiving groove 122 is communicated with the third rotating hole 121 . The first end 21 is embedded in the receiving groove 122 .

[0082] Since the cantilever 12 is provided with the receiving groove 122, the receiving groove 122 can form a space for arranging the first end 21. When the first end 21 is connected to the cantilever 12, the first end 21 can be embedded in the receiving groove 122. Since the receiving groove 122 is connected to the third rotation hole 121, the fourth rotation hole 211 on the first end 21 located in the receiving groove 122 can be opposite to the third rotation hole 121, which can facilitate the second main shaft 50 to pass through the third rotation hole 121, reach the receiving groove 122 and pass through the fourth rotation hole 211.

[0083] Such arrangement, in addition to realizing the rotational connection between the cantilever 12 and the first end 21, the accommodating groove 122 also has a limiting effect on the first end 21, which can prevent the first end 21 from moving along the axial direction of the second main shaft 50 and causing the first end 21 to fall off, thereby preventing the transmission member 20 from being disconnected from the cantilever 12.

[0084] Of course, the pivot 10 and the first end 21 may also rotate in other ways, for example, the cantilever 12 and the first end 21 may be arranged adjacent to each other along the axis direction of the second main shaft 50. The second main shaft 50 may also be arranged in the third rotation hole 121 and the fourth rotation hole 211 to realize the rotation connection between the pivot 10 and the first end 21. The specific manner of the rotation connection between the pivot 10 and the first end 21 is not specifically limited in the embodiment of the present application.

[0085] It should be noted that, in order to prevent the first end 21 and the second spindle 50 from moving, a retaining ring 70 may be provided to limit the first end 21, and a retaining spring 71 may be provided to limit the second spindle 50. For details, please refer to the description in the above-mentioned method 1, and the embodiment of the present application is not specifically limited here.

[0086] In some embodiments, Figure 4 As shown, the support body 32 may include a first mounting plate 324, a second mounting plate 325 and a third mounting plate 326, and the second mounting plate 325 is opposite to and spaced from the third mounting plate 326. The first mounting plate 324 is connected between the second mounting plate 325 and the third mounting plate 326, and the first mounting plate 324, the second mounting plate 325 and the third mounting plate 326 are enclosed to form a mounting space 327, and at least part of the moving contact 31 is arranged in the mounting space 327 and is located on a side of the first mounting plate 324 away from the transmission member 20.

[0087] With such arrangement, an installation space 327 for installing the moving contact 31 can be formed inside the support body 32 , which can facilitate the installation of the moving contact 31 .

[0088] Specifically, the second mounting plate 325 may be provided with a fifth rotation hole 3251, and the third mounting plate 326 may be provided with a sixth rotation hole, and the fifth rotation hole 3251 is opposite to the sixth rotation hole. The moving contact 31 is provided between the second mounting plate 325 and the third mounting plate 326, and the rotating shaft 60 may pass through the fifth rotation hole 3251, the sixth rotation hole and the moving contact 31 to achieve the rotation connection of the moving contact 31.

[0089] In the embodiment of the present application, the first mounting plate 324 is rotatably connected to the second end 22 at one side close to the transmission member 20. That is, the support body 32 can be rotatably connected to the second end 22 through the first mounting plate 324, and the moving contact 31 is connected to the second mounting plate 325 and the third mounting plate 326. Therefore, the connection position between the second end 22 and the support body 32 is different from the connection position between the moving contact 31 and the support body 32. The part of the support body 32 between the two connection positions can be used as a connecting rod to form a multi-link mechanism together with the transmission member 20 and the pivot 10 to increase the stroke of the moving contact 31 when the circuit breaker is closed and opened.

[0090] In some embodiments, Figure 1 and Figure 5 As shown, part of the first mounting plate 324 extends outward from the second mounting plate 325, and a limiting hole 328 can be provided on the part of the first mounting plate 324 extending outward from the second mounting plate 325. The moving contact assembly 30 also includes a support member 33, on which a contact mounting position is provided, and the moving contact 31 is installed at the contact mounting position. The support member 33 is at least partially provided in the mounting space 327 and is located on the side of the first mounting plate 324 away from the transmission member 20. The second mounting plate 325 and the third mounting plate 326 are both in contact with the support member 33. A clamping structure is provided on the side of the support member 33 facing the first mounting plate 324, and the clamping structure is embedded in the limiting hole 328.

[0091] The movable contact assembly 30 further includes a support member 33, and the movable contact 31 can be mounted on the support body 32 through the support member 33. Specifically, a contact mounting position is provided on the support member 33, and the movable contact 31 can be mounted on the contact mounting position so that at least part of the movable contact 31 is located in the mounting space 327.

[0092] Part of the first mounting plate 324 extends outward from the second mounting plate 325, so that part of the first mounting plate 324 is higher than the second mounting plate 325, and the support member 33 can be installed through the part of the first mounting plate 324. A clamping structure is provided on the side of the support member 33 facing the first mounting plate 324, and a limiting hole 328 is provided on the part of the first mounting plate 324 extending outward from the second mounting plate 325. The clamping structure can be embedded in the limiting hole 328 to connect the support member 33 with the first mounting plate 324.

[0093] Since the second mounting plate 325 and the third mounting plate 326 are both in contact with the support member 33, the second mounting plate 325 and the third mounting plate 326 can support the support member 33. This can prevent the force of the support member 33 on the support body 32 from being concentrated on the clamping structure and the limiting hole 328, which may cause the clamping structure or the limiting hole 328 to be easily damaged by the force.

[0094] In the related art, the moving contact assembly also includes a contact support, which is provided with a mounting groove, in which the moving contact and the contact spring are both arranged, and one end of the contact spring abuts against the contact support, and the other end of the contact spring abuts against the moving contact. That is, the contact support is used to support the contact spring and the moving contact.

[0095] Generally speaking, the contact support is made of unsaturated polyester dough molding compounds (DMC). DMC material has excellent electrical properties, heat resistance and chemical corrosion resistance, and can also be adapted to various molding processes. It is the main material for making contact supports. When connecting the moving contact and the contact support, it is also necessary to connect the clamping plate on both sides of the contact support by means of self-tapping screws. The clamping plate is provided with an opening, and the rotating shaft is passed through the opening and the moving contact, and is supported by the hole wall of the opening.

[0096] In the embodiment of the present application, when a contact spring is provided between the moving contact 31 and the support body 32, one end of the contact spring can abut against the moving contact 31, and the other end of the contact spring can abut against the support body 32. That is, in the present application, the moving contact 31 is provided on the support member 33, and the contact spring is provided between the support body 32 and the moving contact 31.

[0097] Based on the above description, in the present application, the support member 33 can support the moving contact 31, and the support body 32 can support the contact spring, so that the support body 32 and the support member 33 are equivalent to the contact support in the related art. The second mounting plate 325 and the third mounting plate 326 in the support body 32 can realize the role of the clamping plate in the related art, and the hole wall of the fifth rotating hole 3251 and the hole wall of the sixth rotating hole can provide support for the rotating shaft 60.

[0098] In this way, the support member 33 only needs to be placed on the second mounting plate 325 and the third mounting plate 326, and the clamping structure is embedded in the limiting hole 328 to complete the connection between the support member 33 and the support body 32. When the moving contact 31 is subsequently connected, the rotating shaft 60 can be directly inserted into the fifth rotating hole 3251 and the sixth rotating hole, and the installation method is relatively simple. The additional process of connecting the clamping plate with self-tapping screws can be avoided, reducing the difficulty of assembly.

[0099] In addition, the support body 32 can be made of sheet metal in an integrally formed manner. For example, the middle of a metal plate can be stamped to form a first mounting plate 324, and the two sides of the metal plate can form a second mounting plate 325 and a third mounting plate 326. The manufacturing process of the support body 32 can be simplified, the manufacturing efficiency of the support body 32 can be improved, and the manufacturing cost of the support body 32 can be reduced. Therefore, the manufacturing and assembly efficiency of the support body 32 and the support member 33 can be further improved.

[0100] In order to make the support member 33 have excellent electrical performance and better support the moving contact 31 , the support member 33 can still be made of DMC material.

[0101] It should be noted that, when the support body 32 is made of sheet metal in an integrally formed manner, the first fixing plate 322 and the second fixing plate 323 can also be obtained by stamping. That is, stamping can be performed on the first mounting plate 324 along the direction from the moving contact assembly 30 to the pivot 10, so that the material in the middle of the first mounting plate 324 is bent in the direction close to the pivot 10, thereby forming the first fixing plate 322 and the second fixing plate 323.

[0102] It should also be noted that the transmission member 20 can also be made of sheet metal. For example, four openings can be punched out in two rows and two columns on a metal plate, and then the metal plate is folded in half so that two openings in the same row face each other, and the two facing openings are connected to form the second rotation hole 221 or the fourth rotation hole 211. Figure 3 As shown. With this arrangement, on the one hand, punching can be performed on a thinner metal plate, which can avoid the problem of being unable to punch when punching a thicker metal plate. On the other hand, after the metal plate is folded in half, the strength and deformation resistance of the metal plate are improved.

[0103] Of course, the transmission member 20 may also be made of a thicker sheet metal member. When punching the second rotating hole 221 and the fourth rotating hole 211 , a punching machine with a larger punching force needs to be used in combination.

[0104] In the embodiment of the present application, when the circuit breaker is closed or opened, the pivot 10 can rotate and drive the transmission member 20 to rotate through the first end 21. At the same time, the second end 22 of the transmission member 20 rotates accordingly and drives the moving contact assembly 30 to rotate, so that the moving contact assembly 30 can contact or separate from the static contact assembly. In the present application, the moving contact assembly 30 itself can serve as a connecting rod. Thus, the pivot 10, the transmission member 20 and the moving contact assembly 30 can form a multi-link mechanism, increasing the stroke of the moving contact assembly 30 when the circuit breaker is closed and opened. Thus, the opening distance between the moving contact assembly 30 and the static contact assembly can be increased, which is conducive to improving the insulation performance and breaking capacity of the circuit breaker including the above-mentioned moving contact system 100.

[0105] Finally, it should be noted that the above embodiments are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A moving contact system, characterized in that: The moving contact system comprises: Pivot; A transmission member having a first end and a second end opposite to each other, wherein the first end is rotatably connected to the pivot; The moving contact assembly is located at a side of the transmission member away from the pivot, and a side of the moving contact assembly close to the transmission member is rotatably connected to the second end.

2. The moving contact system according to claim 1, characterized in that: The moving contact assembly comprises a moving contact and a supporting body; The moving contact is installed on a side of the support body away from the transmission member, and the moving contact can rotate relative to the support body; the side of the support body close to the transmission member is rotatably connected to the second end.

3. The moving contact system according to claim 2, characterized in that: A first rotating hole is provided on one side of the support body close to the transmission member, and a second rotating hole is provided on the second end. The first rotating hole and the second rotating hole are opposite to each other, and a first main shaft is passed through the first rotating hole and the second rotating hole, and the first main shaft can rotate relative to the first rotating hole and the second rotating hole.

4. The moving contact system according to claim 2, characterized in that: A first fixing plate and a second fixing plate are spaced apart on one side of the support body close to the transmission member, and the first fixing plate is opposite to the second fixing plate; The second end is located between the first fixing plate and the second fixing plate, and the first fixing plate and the second fixing plate are both rotatably connected to the second end.

5. The moving contact system according to claim 2, characterized in that: A fixing piece is arranged on one side of the support body close to the transmission piece, and a limiting groove is arranged on the second end. The fixing piece is embedded in the limiting groove and is rotatably connected with the second end.

6. The moving contact system according to claim 1, characterized in that: The pivot comprises a body and a cantilever connected to each other, the cantilever is located on a side of the body close to the transmission member, and a third rotation hole is provided on the cantilever; The first end is provided with a fourth rotating hole, the third rotating hole and the fourth rotating hole are opposite to each other, a second main shaft is passed through the third rotating hole and the fourth rotating hole, and the second main shaft is rotatable relative to the third rotating hole and the fourth rotating hole.

7. The moving contact system according to claim 6, characterized in that: A receiving groove is also provided on one side of the cantilever facing the transmission member, and the receiving groove is communicated with the third rotating hole; The first end is embedded in the accommodating groove.

8. The moving contact system according to claim 2, characterized in that: The support body comprises a first mounting plate, a second mounting plate and a third mounting plate, the second mounting plate is opposite to the third mounting plate and is arranged at a distance, the first mounting plate is connected between the second mounting plate and the third mounting plate, the first mounting plate, the second mounting plate and the third mounting plate are enclosed to form a mounting space, the moving contact is at least partially arranged in the mounting space and is located on a side of the first mounting plate away from the transmission member; A side of the first mounting plate close to the transmission member is rotatably connected to the second end.

9. The moving contact system according to claim 8, characterized in that: A portion of the first mounting plate extends outward from the second mounting plate, and a limiting hole is provided on the portion of the first mounting plate extending outward from the second mounting plate; The movable contact assembly further comprises a support member, a contact mounting position is arranged on the support member, the movable contact is mounted on the contact mounting position, the support member is at least partially arranged in the mounting space, and is located on a side of the first mounting plate away from the transmission member, and the second mounting plate and the third mounting plate are both in contact with the support member; A clamping structure is provided on one side of the support member facing the first mounting plate, and the clamping structure is embedded in the limiting hole.

10. A circuit breaker, characterized in that: The circuit breaker comprises the moving contact system according to any one of claims 1 to 9.

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