Rotary contact assembly and rotary disconnecting switch

Abstract

A rotary contact assembly and a rotary disconnecting switch comprise a supporting seat, a supporting cover and a moving contact, the moving contact is located between the supporting seat and the supporting cover, the moving contact comprises two moving contact pieces which are oppositely arranged, a fixing shaft and an elastic piece, the moving contact further comprises a contact support, two grooves are formed in the two opposite faces of the contact support, and the moving contact pieces are arranged in the grooves. The two grooves are of a through structure in the length direction of the moving contact, the middle portions of the two moving contact pieces are arranged in the two grooves respectively, the two ends of the two moving contact pieces extend out of the grooves, and the elastic piece is arranged on the face, away from the contact support, of at least one moving contact piece and provides inward clamping force for the two moving contact pieces. The fixed shaft penetrates through the two moving contact pieces, the contact support and the elastic piece, the two moving contact pieces are identical in structure, one face of each moving contact piece comprises at least one boss, the bosses of the two moving contact pieces abut against each other, and a clamping gap is formed between the two ends of each moving contact piece. The contact support enhances the structural strength of the moving contact, and the structural stability is high.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to a rotary contact assembly and a rotary disconnect switch. Background Technology

[0002] Rotary disconnect switches serve to isolate power supplies and break circuits. With the rapid development of the photovoltaic field, disconnect switches have also been widely used. In recent years, increasingly higher requirements have been placed on the current carrying capacity and temperature rise performance of disconnect switches.

[0003] A rotary disconnector switch includes switch contacts, which in turn include moving contacts and stationary contacts. The opening and closing of these contacts achieves circuit breaking and connection. Excessive internal resistance of the moving and stationary contacts reduces the current-carrying capacity and temperature rise performance of the rotary disconnector switch. One way to reduce internal resistance is to increase the contact area between the moving and stationary contacts; another is to increase the clamping force between them to ensure reliable contact.

[0004] In the prior art, elastic elements are usually placed on the back of the two moving contact pieces to support the contact. The contact pressure is applied to the moving contact pieces by compressing the elastic elements. The moving contact structure made in this way is relatively loose, and the two pieces of the moving contact are easy to wobble. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a rotary contact assembly and rotary disconnect switch with a compact structure and stronger clamping force between the moving contact and the stationary contact.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, this application provides a rotary contact assembly, including a support base, a support cover, and a movable contact. The movable contact is located between the support base and the support cover, and the support cover is closed on the support base. The movable contact is rotatably configured to contact or disconnect from a stationary contact.

[0008] The moving contact includes two moving contact pieces arranged opposite each other, at least one fixed shaft, and at least one elastic element. The two moving contact pieces have clamping gaps at both ends for clamping the stationary contact.

[0009] The moving contact also includes a contact support. Two grooves are provided on opposite sides of the contact support, and the two grooves are continuous along the length of the moving contact. The middle portions of the two moving contact pieces are respectively placed within the two grooves, with both ends extending out of the grooves. The elastic element is disposed on the side of at least one moving contact piece away from the contact support, providing an inward clamping force for the two moving contact pieces. At least one fixed shaft passes through the two moving contact pieces, the contact support, and the elastic element, connecting the two moving contact pieces, the contact support, and the elastic element into a single unit.

[0010] At least one boss is provided on the opposing surfaces of the two moving contact pieces, so that the two ends of the two moving contact pieces form the clamping gap for clamping the stationary contact.

[0011] In one possible implementation, the two moving contact pieces have the same structure, and each of the opposing mating surfaces is provided with at least one boss. The bosses of the two moving contact pieces abut against each other, so that the two ends of the two moving contact pieces form the clamping gap for clamping the stationary contact.

[0012] In one possible implementation, the contact support includes two opposing contact side plates and a contact cross plate located between the two contact side plates. The two contact side plates are connected to the contact cross plate, and the grooves are formed on opposite sides of the contact cross plate. The contact cross plate includes at least one mounting through hole or at least one second notch, and the boss is located in the mounting through hole or the second notch, limiting the two moving contact pieces.

[0013] In one possible implementation, the contact plate is abutted against the two moving contact pieces on both sides along the thickness direction, providing an initial clamping gap for the moving contacts.

[0014] In one possible implementation, the two ends of the contact plate in the length direction include a second notch, and the bosses of the two moving contact pieces are at least partially located within the second notch.

[0015] In one possible implementation, two protrusions are provided between the two ends of the moving contact piece and the middle of the moving contact piece.

[0016] In one possible implementation, the fixed shaft includes a first locking portion and a second riveting portion connected together. The diameter of the first locking portion is larger than the diameter of the second riveting portion. The second riveting portion passes through at least one of the elastic elements, two moving contact pieces, and a contact support. The first locking portion abuts against the upper surface of the elastic element, and the bottom opening of the second riveting portion forms a riveting groove.

[0017] In one possible implementation, the elastic element includes a flat plate support portion located in the middle, and each end of the flat plate support portion is sequentially bent and connected with a first bent portion and a second bent portion. The bending angle between the flat plate support portion and the first bent portion is an obtuse angle. The first bent portion and the second bent portion are bent and connected to form a bent protrusion. The two ends of the moving contact piece include a first limiting groove, and the bent protrusion abuts against the first limiting groove.

[0018] In one possible implementation, the support cover includes a linkage handle at the top and two linkage bosses on both sides of the linkage handle, with the line connecting the two linkage bosses perpendicular to the linkage handle. The support base includes a first support platform at the bottom, which includes a handle groove that cooperates with and limits the linkage handle and a first groove that cooperates with and limits the linkage bosses.

[0019] Secondly, this application provides a rotary disconnect switch, including the rotary contact assembly described above, and further including a housing, an operating mechanism and at least one arc-extinguishing grid group. The rotary contact assembly and at least one arc-extinguishing grid group are disposed within the housing. The operating mechanism is connected to the rotary contact assembly to drive the moving contact to rotate. At least one arc-extinguishing grid group surrounds the side of the rotary contact assembly.

[0020] Compared to existing technologies, the rotary contact assembly provided in this application includes a contact support. Two grooves are provided on opposite sides of the contact support. The middle portions of two moving contact pieces are respectively placed within the two grooves, with both ends extending out of the grooves. At least one boss is provided on the facing surfaces of the two moving contact pieces, forming a clamping gap at both ends for holding the stationary contact. An elastic element is provided on the side of the moving contact piece facing away from the contact support. At least one fixed shaft passes through the elastic element, the moving contact piece, and the contact support, fixing the moving contact piece, the contact support, and the elastic element into a single unit. The contact support enhances the structural strength of the moving contact, preventing the moving contact piece from wobbling during use. This results in high structural stability and improves the current-carrying capacity and temperature rise performance of the rotary disconnector.

[0021] In addition, the two moving contact pieces have the same structure, so only one type of moving contact piece needs to be manufactured to reduce costs. At least one boss is provided on each of the opposing mating surfaces. The bosses of the two moving contact pieces abut against each other, so that the two ends of the two moving contact pieces form the clamping gap for clamping the stationary contact.

[0022] Furthermore, the contact support includes two opposing contact side plates and a contact cross plate located between the two contact side plates. The two contact side plates and the contact cross plate are connected to each other on both sides of the contact cross plate, forming the grooves respectively. The contact cross plate includes at least one mounting through hole or at least one second notch. The boss is located within the mounting through hole or the second notch. The boss not only forms a clamping gap between the two moving contact pieces, but also cooperates with the mounting through hole or the second notch to limit the two moving contact pieces. Providing a contact support within the rotating contact assembly can limit and fix the two moving contact pieces, preventing them from shaking during rotation and improving the stability of the moving contact.

[0023] In addition, both sides of the moving contact piece include bent protrusions. The bent protrusions of the two moving contact pieces bend in opposite directions. The bent protrusions increase the angle between the two ends of the moving contact, making it easier for the stationary contact to enter the clamping gap. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the rotary contact assembly of this utility model;

[0025] Figure 2 This is an installation diagram of the support cover, moving contact and support base of this utility model;

[0026] Figure 3 This is an exploded view of the rotary contact assembly of this utility model;

[0027] Figure 4 This is an exploded view of the moving contact of this utility model;

[0028] Figure 5 This is a cross-sectional view of the moving contact of this utility model;

[0029] Figure 6 This is a schematic diagram of the structure of the support cover of this utility model;

[0030] Figure 7 This is a schematic diagram of the structure of the support base of this utility model;

[0031] Figure 8 This is a schematic diagram of the arc-extinguishing grid sheet of this utility model;

[0032] Figure 9 This is a schematic diagram of the arc-extinguishing grid assembly of this utility model;

[0033] Figure 10 This is a cross-sectional view of the rotary disconnect switch of this utility model;

[0034] Figure 11 and Figure 12 This is a structural diagram of the internal layout of the rotary disconnect switch of this utility model;

[0035] Figure 13 and Figure 14 This is a schematic diagram of the structure of the rotary contact assembly of this utility model;

[0036] The reference numerals in the attached drawings include: housing 100; operating mechanism 102; rotating contact assembly 101; moving contact 1; stationary contact 15; support base 31; support cover 32; moving contact piece 11; contact support 12; fixed shaft 13; elastic element 14; groove 121; boss 111; first locking part 131; second riveting part 132; riveting groove 134; contact side plate 122; contact cross plate 123; second notch 124; arc-shaped protrusion 114; airflow channel 115; first arc-shaped clearance part 1221; first limiting groove 113; bending protrusion 141; flat plate Support part 142; First bending part 143; Second bending part 144; Bending protrusion 1121; Contact support groove 311; Second arc-shaped clearance part 312; Snap-in hole 313; Snap-in hook 321; Limiting post 322; Linkage handle 323; Linkage boss 324; First support platform 315; Handle groove 316; First groove 317; Second limiting groove 314; Arc extinguishing grid assembly 2; Insulating protective plate 21; Arc extinguishing grid 22; First notch 23; Grid leg 24; Airflow notch 25; Airflow notch 26; Tip structure 233; First mounting protrusion 221. Detailed Implementation

[0037] The specific embodiments of this utility model are further described below with reference to the accompanying drawings. The scope of protection of this utility model is not limited to the description of the following embodiments.

[0038] like Figures 1-12As shown, the rotary disconnect switch includes an operating mechanism 102, a housing 100, and a rotary contact assembly 101, a stationary contact 15, and an arc-extinguishing chamber structure disposed inside the housing 100. The operating mechanism 102 is connected to the rotary contact assembly 101 and drives the rotary contact assembly 101 to rotate. The rotary contact assembly 101 includes a moving contact 1. The stationary contact 15 is fixedly installed on the housing 100, and the moving contact 1 is rotatably disposed. Specifically, the operating mechanism 102 drives the rotary contact assembly 101 to rotate, and the rotation of the rotary contact assembly 101 drives the moving contact 1 to rotate, thereby connecting or disconnecting the moving contact 1 from the stationary contact 15. The arc-extinguishing chamber structure is located on one side of the rotary contact assembly 101 and is used to extinguish the electric arc generated at the moment when the moving contact 1 and the stationary contact 15 are disconnected or closed. The moving contact 1 is a long plate-shaped structure, rotatably mounted in the middle, with clamping gaps at both ends. The moving contact 1 is clamped and connected to the stationary contact 15 through the clamping gaps at both ends. When the moving contact 1 rotates to a certain angle, its end can contact and close with the stationary contact 15, realizing the circuit conduction. When the moving contact 1 rotates again, it can disconnect from the stationary contact 15, realizing the circuit disconnection. The rotary disconnecting switch is usually connected in series in the circuit. The connection and disconnection of the moving contact 1 and the stationary contact 15 control the conduction and disconnection of the circuit. In this embodiment, the rotary disconnecting switch includes two stationary contacts 15, and the two ends of the moving contact 1 are respectively clamped and cooperated with the two stationary contacts 15 to control the conduction and disconnection of the circuit.

[0039] like Figures 1-7 As shown, this application provides a rotary contact assembly 101, which further includes a support base 31 and a support cover 32. The movable contact 1 is located between the support base 31 and the support cover 32. The support cover 32 covers the support base 31. The movable contact 1 includes two movable contact pieces 11 with the same structure and arranged opposite to each other. The two movable contact pieces 11 have the clamping gap at both ends. The two movable contact pieces have the same structure, so only one type of movable contact piece needs to be manufactured to reduce costs.

[0040] The moving contact 1 further includes a contact support 12, at least one fixed shaft 13, and at least one elastic element 14. The contact support 12 has two grooves 121 on opposite sides, which are through-type along the length of the moving contact 1, allowing the two ends of the two moving contact pieces 11 to extend out. The middle portions of the two moving contact pieces 11 are respectively placed within the two grooves 121, and their ends extend out from the grooves 121. The elastic element 14 is located on the side of at least one moving contact piece 11 away from the contact support 12, providing an inward clamping force to the two moving contact pieces 11, thus allowing the two moving contacts... The clamping gaps at both ends of the plate 11 clamp the stationary contact 15. At least one of the fixed shafts 13 passes through the two moving contact plates 11, the contact support 12, and the elastic member 14, connecting the two moving contact plates 11, the contact support 12, and the elastic member 14 into a whole. For example, one fixed shaft 13 can pass through the center of the two moving contact plates 11, the contact support 12, and the elastic member 14, or at least two fixed shafts 13 can pass through both sides of the center of the two moving contact plates 11, the contact support 12, and the elastic member 14. In this embodiment, the structural strength of the moving contact 1 is enhanced by setting the contact support 12.

[0041] In this embodiment of the application, the moving contact 1 includes an elastic element 14, two moving contact pieces 11, and a fixed shaft 13. The fixed shaft 13 passes through the elastic element 14, one moving contact piece 11, the contact support 12, and the other moving contact piece 11 in sequence, so that the elastic element 14, one moving contact piece 11, the contact support 12, and the other moving contact piece 11 are fixed as a whole.

[0042] like Figure 4 As shown, one side of the moving contact piece 11 includes at least one boss 111. The bosses 111 of the two moving contact pieces 11 abut against each other, so that the two ends of the two moving contact pieces 11 form the clamping gap for clamping the stationary contact 15. The boss 111 can be formed by stamping on the back of the moving contact piece 11, without bending the moving contact piece 11, reducing process steps, making production convenient and low-cost. At the same time, the elastic member 14 is provided on the side of the moving contact piece 11 facing away from the contact support 12, providing clamping force to both ends of the moving contact 1, making the connection between the moving contact 1 and the stationary contact 15 more reliable. In addition, the elastic member 14 also limits the moving contact 1 in the thickness direction, making it less prone to shaking, with high structural stability, improving the current carrying capacity and temperature rise performance of the rotary disconnector.

[0043] Preferred, such as Figures 3-4 As shown, the moving contact piece 11 includes two bosses 111 between its two ends and the middle part, which can enhance the stability of the two moving contact pieces 11 after installation.

[0044] Preferred, such as Figures 3-4As shown, the contact support 12 includes two opposing contact side plates 122 and a contact cross plate 123 located between the two contact side plates 122. The two contact side plates 122 and the contact cross plate 123 are connected to each other and form the grooves 121 on both sides of the contact cross plate 123. The contact cross plate 123 includes at least one mounting through hole or at least one second notch 124. The boss 111 is located in the mounting through hole or the second notch 124. The boss 111 not only forms a clamping gap between the two moving contact pieces 11, but also cooperates with the mounting through hole or the second notch 124 to limit the length of the two moving contact pieces 11.

[0045] Furthermore, the two sides of the contact plate 123 along the thickness direction are closely attached to the two moving contact pieces 11, providing an initial clamping gap for the moving contact.

[0046] Furthermore, such as Figures 3-4 As shown, the two ends of the contact plate 123 along its length include second notches 124, and the protrusions 111 of the two moving contact pieces 11 are at least partially located within the second notches 124. The protrusions 111 are cylindrical or square structures. In this embodiment, the protrusions 111 are preferably cylindrical, and the second notches 124 are preferably arc-shaped and have the same curvature as the cross-section of the protrusions 111, which can achieve a better limiting effect.

[0047] Furthermore, such as Figure 4 As shown, the moving contact piece 11 has arc-shaped protrusions 114 on both sides of the middle part. Since the fixed shaft 13 passes through the middle part of the moving contact piece 11, the arc-shaped protrusions 114 can enhance the structural strength of the middle part of the moving contact piece 11. The two contact side plates 122 of the contact support 12 include a first arc-shaped relief portion 1221. The arc of the first arc-shaped relief portion 1221 is consistent with the arc of the arc-shaped protrusion 114. The arc-shaped protrusion 114 fits against the first arc-shaped relief portion 1221, so that the moving contact piece 11 is just installed in the groove 121, further limiting the width direction of the moving contact piece.

[0048] Preferred, such as Figure 4 As shown, the fixed shaft 13 includes a first locking part 131 and a second riveting part 132 connected together. The first locking part 131 is a disc structure, and the second riveting part 132 is a cylindrical structure. The diameter of the first locking part 131 is larger than the diameter of the second riveting part 132. The second riveting part 132 passes through at least one of the elastic members 14, two moving contact pieces 11 and contact support 12. The first locking part 131 abuts against the upper surface of the elastic member 14.

[0049] Furthermore, such as Figure 5 and Figure 10As shown, the bottom opening of the second riveting part 132 forms a riveting groove 134, which is riveted into the moving contact piece 11, fixing the elastic member 14, the moving contact piece 11, and the contact support 12 into a whole. Figure 5 This is a schematic diagram of the structure of the moving contact 1 in this application. Figure 10 This is a cross-sectional view of the rotary disconnector of this application. Of course, as in other embodiments, the fixed shaft 13 can also be fixed and limited by welding or other means.

[0050] Furthermore, the rotary disconnect switch also includes a top plate located at the top of the rotary contact assembly 101 and a bottom plate located at the bottom of the rotary contact assembly 101. The top plate and the bottom plate clamp the support base 31 and the support cover 32. A magnet is provided between the top plate and the bottom plate. The magnetic field generated by the magnet interacts with the arc current, driving the arc to stretch or rotate outward, so that it cools down and extinguishes quickly.

[0051] Preferred, such as Figure 4 As shown, the moving contact piece 11 has a first limiting groove 113 at both ends, and the elastic member 14 has a bending protrusion 141 at both ends. The bending protrusion 141 abuts against the first limiting groove 113 to provide clamping force for the moving contact 1 at both ends.

[0052] Furthermore, such as Figure 4 As shown, the elastic member 14 includes a flat plate support portion 142 located in the middle. Each end of the flat plate support portion 142 is sequentially bent and connected with a first bending portion 143 and a second bending portion 144. The bending angle between the flat plate support portion 142 and the first bending portion 143 is an obtuse angle. The first bending portion 143 and the second bending portion 144 are bent and connected to form the bending protrusion 141.

[0053] Furthermore, the flat plate support portion 142 is preferably parallel to the moving contact piece 11, and there is an elastic gap between the flat plate support portion 142 and the moving contact piece 11, so that the elastic element 14 can bend and undergo elastic deformation to provide clamping force for both ends of the moving contact 1.

[0054] Preferred, such as Figure 2 As shown, both sides of the moving contact piece 11 include bent protrusions 1121. When the two moving contact pieces 11 are facing each other, the bent protrusions 1121 of the two moving contact pieces 11 bend in opposite directions. The bent protrusions 1121 increase the angle between the two ends of the moving contact 1, making it easier for the stationary contact 15 to enter the clamping gap.

[0055] Preferred, such as Figures 2-4As shown, the support base 31 is provided with a contact support groove 311, and the moving contact 1 is installed in the contact support groove 311. The two sides of the contact support groove 311 include second arc-shaped relief portions 312. The first arc-shaped relief portion 1221 of the contact support 12 fits against the second arc-shaped relief portion 312, limiting the movement of the contact support 12.

[0056] Furthermore, such as Figure 6 and Figure 7 As shown, the support base 31 and the support cover 32 are snap-fitted together. The support base 31 is provided with a plurality of snap-fit ​​holes 313 or snap-fit ​​slots, and the support cover 32 includes a plurality of snap-fit ​​hooks 321 extending toward the support base 31; or the support base 31 includes a plurality of snap-fit ​​hooks 321 extending toward the support cover 32, and the support cover 32 is provided with a plurality of snap-fit ​​holes 313 or snap-fit ​​slots, and the snap-fit ​​hooks 321 extend into the snap-fit ​​holes 313 or snap-fit ​​slots and are fixedly installed with the snap-fit ​​holes 313 or snap-fit ​​slots.

[0057] In this embodiment, as Figure 6 and Figure 7 As shown, the support cover 32 includes four buckle hooks 321, and the support base 31 includes four buckle holes 313.

[0058] Furthermore, the support base 31 and the support cover 32 are fixed by heat fusion to enhance the sealing performance and insulation effect of the rotary contact assembly 101. The support base 31 is provided with multiple heat fusion pillars, and the support cover 32 is provided with multiple heat fusion holes or heat fusion grooves; alternatively, the support base 31 is provided with multiple heat fusion holes or heat fusion grooves, and the support cover 32 is provided with multiple heat fusion pillars, which are installed in the heat fusion holes or heat fusion grooves and fixed by heat fusion process.

[0059] Furthermore, the support base 31 includes multiple limiting posts 322, and the support cover 32 includes multiple second limiting grooves 314 or limiting holes; or, the support base 31 includes multiple second limiting grooves 314 or limiting holes, and the support cover 32 includes multiple limiting posts 322, wherein the limiting posts 322 are installed in the limiting holes or second limiting grooves 314 to limit and fix the support base 31 and the support cover 32.

[0060] In this embodiment, as Figure 6 and Figure 7 As shown, the support base 31 includes two second limiting grooves 314, and the support cover 32 includes two limiting posts 322.

[0061] Preferred, such as Figures 12-14As shown, the top of the support cover 32 includes a first linkage part, and the bottom of the support base 31 includes a second linkage part. The first linkage part and the second linkage part can be installed together. When the rotary disconnect switch includes multiple switch units stacked together, multiple rotary contact assemblies 101 are stacked together. The support base 31 of the previous rotary contact assembly and the support cover 32 of the next rotary contact assembly 101 are installed together to achieve linkage. Figure 13 This is a bottom view of the rotary contact assembly 101. Figure 14 This is a top view of the rotary contact assembly 101.

[0062] Furthermore, such as Figures 12-14 As shown, the first linkage part includes a linkage handle 323 protruding from the top of the support cover 32 and two linkage bosses 324 located on both sides of the linkage handle 323. The line connecting the two linkage bosses 324 is perpendicular to the linkage handle 323. The second linkage part includes a first support platform 315 protruding from the bottom of the support seat 31. The first support platform 315 includes a handle groove 316 that cooperates with and limits the linkage handle 323 and a first groove 317 that cooperates with and limits the linkage bosses 324. In this embodiment, the handle groove 316 and the first groove 317 are connected to form a "+" shaped structure. The support seat 31, the first support platform 315, the handle groove 316, and the first groove 317 are integrally injection molded, which is simple to operate and low in cost. In this application, the linkage handle 323 and the handle groove 316 limit the engagement; the two linkage bosses 324 and the first groove 317 limit the engagement, which can improve the synchronization of the multiple stacked rotating contact assemblies 101.

[0063] like Figure 9 and Figure 10 As shown, the arc-extinguishing chamber structure includes at least one arc-shaped arc-extinguishing grid plate group 2. The arc-shaped arc-extinguishing grid plate group 2 follows the rotation trajectory of the moving contact 1 and surrounds the side of the rotating contact assembly 101. In this embodiment, the arc-extinguishing chamber structure includes two arc-shaped arc-extinguishing grid plate groups 2. The two arc-shaped arc-extinguishing grid plate groups 2 surround the two sides of the rotating contact assembly 101 and enclose the rotating contact assembly 101, which can effectively extinguish the arc generated when the moving contact 1 and the stationary contact 15 come into contact or break.

[0064] like Figures 8-12The arc-extinguishing grid assembly 2 includes two insulating plates 21 and multiple arc-extinguishing grids 22 installed between the two insulating plates 21. The arc-extinguishing grids 22 are stacked and spaced apart. Each arc-extinguishing grid 22 includes a first notch 23 and two grid legs 24 located on both sides of the first notch 23. The first notch 23 faces the rotary contact assembly 101. Each arc-extinguishing grid 22 also includes an airflow notch 25 located on the back of the first notch 23 and airflow notches 26 located on both sides of the airflow notch 25. The multiple arc-extinguishing grids 22 are stacked and spaced apart, so that the multiple airflow notches 25 and airflow notches 26 form an airflow channel 115 between the multiple airflow notches 25 and airflow notches 26 and the housing 100 of the rotary disconnector, increasing the gap between the arc-extinguishing chamber structure and the housing 100 of the rotary disconnector. During the arc-extinguishing process of the arc-extinguishing chamber structure, it can play a role in clearing the airflow and facilitating the directional flow of airflow. Figure 11 and Figure 12 This is a structural diagram of the internal layout of the rotary disconnect switch of this utility model. Figure 12 yes Figure 11 A schematic diagram of the structure of an arc-extinguishing grid assembly 2 without the insulating protective plate 21.

[0065] Preferred, such as Figure 8 As shown, the airflow gap 25 is arc-shaped, and the smooth arc structure is conducive to airflow. The airflow notch 26, the airflow gap 25 and the housing 100 of the rotary disconnect switch form an airflow channel 115 of varying width and similar to a wave. The wave-shaped structure of varying width is more conducive to extinguishing the electric arc.

[0066] Preferred, such as Figure 8 As shown, the first notch 23 includes a first arc-extinguishing groove at the entrance and a second arc-extinguishing groove at the bottom. The first and second arc-extinguishing grooves are connected. The first arc-extinguishing groove has a "V" shaped structure, and the second arc-extinguishing groove has a "U" shaped structure and is inclined.

[0067] Furthermore, such as Figure 8 As shown, the width at the entrance of the first notch 23 is greater than the width at the bottom of the first notch 23, including a first side and a second side opposite to each other. The first side protrudes toward the second side, forming a triangular tip structure 233. There is a gap between the tip structure 233 and the second side. The tip structure 233 divides the first notch 23 into the first arc-extinguishing groove and the second arc-extinguishing groove.

[0068] Furthermore, such as Figure 9 As shown, the adjacent arc-extinguishing grid plates 22 are arranged in an alternating pattern, so that the second arc-extinguishing grooves of the first notch 23 of the adjacent arc-extinguishing grid plates 22 are tilted in opposite directions, and the protrusions of the tip structure 233 are in opposite directions.

[0069] Preferably, the arc-extinguishing grid plate 22 includes at least one first mounting structure on both sides, and the insulating protective plate 21 is provided with a second mounting structure that cooperates with the first mounting structure for installation and fixation.

[0070] Furthermore, such as Figure 8 and Figure 9 As shown, the first mounting structure includes a first mounting protrusion 221, and the second mounting structure is a first mounting groove or a first mounting hole. In this embodiment, two first mounting protrusions 221 are respectively provided at intervals on both sides of the arc-extinguishing grid plate 22, and multiple first mounting holes are provided on the two insulating protective plates 21 for mounting and fixing multiple arc-extinguishing grid plates 22.

[0071] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description 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. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0072] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A rotary contact assembly (101) comprising a support base (31), a support cover (32), and a movable contact (1), wherein the movable contact (1) is located between the support base (31) and the support cover (32), the support cover (32) is closed on the support base (31), and the movable contact (1) is rotatably configured to contact or disconnect from a stationary contact (15). The moving contact (1) includes two moving contact pieces (11) arranged opposite to each other, at least one fixed shaft (13) and at least one elastic element (14). The two moving contact pieces (11) have clamping gaps at both ends for clamping the stationary contact (15). Its features are, The moving contact (1) further includes a contact support (12). Two grooves (121) are provided on opposite sides of the contact support (12). The two grooves (121) are through-type along the length of the moving contact (1). The middle portions of the two moving contact pieces (11) are respectively placed in the two grooves (121), and both ends extend out of the grooves (121). The elastic element (14) is disposed on the side of at least one moving contact piece (11) away from the contact support (12), providing an inward clamping force for the two moving contact pieces (11). At least one fixed shaft (13) passes through the two moving contact pieces (11), the contact support (12), and the elastic element (14), connecting the two moving contact pieces (11), the contact support (12), and the elastic element (14) into a single unit. At least one boss (111) is provided on the facing surfaces of the two moving contact pieces (11), so that the two ends of the two moving contact pieces (11) form the clamping gap for clamping the stationary contact (15).

2. The rotary contact assembly (101) according to claim 1, characterized in that, The two moving contact pieces (11) have the same structure, and each of them has at least one boss (111) on the surface of the two moving contact pieces (11). The bosses (111) of the two moving contact pieces (11) abut against each other, so that the two ends of the two moving contact pieces (11) form the clamping gap for clamping the stationary contact (15).

3. A rotary contact assembly (101) according to claim 1, characterized in that, The contact support (12) includes two opposing contact side plates (122) and a contact cross plate (123) located between the two contact side plates (122). The two contact side plates (122) are connected to the contact cross plate (123), and the groove (121) is formed on the opposite sides of the contact cross plate (123). The contact cross plate (123) includes at least one mounting through hole or at least one second notch (124). The boss (111) is located in the mounting through hole or the second notch (124) and limits the two moving contact pieces (11).

4. A rotary contact assembly (101) according to claim 3, characterized in that, The contact plate (123) is attached to the two moving contact pieces (11) on both sides along the thickness direction, providing an initial clamping gap for the moving contact.

5. A rotary contact assembly (101) according to claim 3, characterized in that, The contact plate (123) includes a second notch (124) at both ends along its length, and the bosses (111) of the two moving contact pieces (11) are at least partially located within the second notch (124).

6. A rotary contact assembly (101) according to claim 1, characterized in that, Two protrusions (111) are provided between the two ends of the moving contact piece (11) and the middle part of the moving contact piece (11).

7. A rotary contact assembly (101) according to claim 1, characterized in that, The fixed shaft (13) includes a first locking part (131) and a second riveting part (132) connected together. The diameter of the first locking part (131) is larger than the diameter of the second riveting part (132). The second riveting part (132) passes through at least one of the elastic members (14), two moving contact pieces (11) and contact support (12). The first locking part (131) abuts against the upper surface of the elastic member (14). The bottom opening of the second riveting part (132) forms a riveting groove (134).

8. A rotary contact assembly (101) according to claim 1, characterized in that, The elastic element (14) includes a flat plate support (142) located in the middle. Each end of the flat plate support (142) is sequentially bent and connected with a first bent portion (143) and a second bent portion (144). The bending angle between the flat plate support (142) and the first bent portion (143) is an obtuse angle. The first bent portion (143) and the second bent portion (144) are bent and connected to form a bent protrusion (141). The two ends of the moving contact piece (11) include a first limiting groove (113). The bent protrusion (141) abuts against the first limiting groove (113).

9. A rotary contact assembly (101) according to claim 1, characterized in that, The support cover (32) includes a linkage handle (323) at the top and two linkage bosses (324) on both sides of the linkage handle (323). The line connecting the two linkage bosses (324) is perpendicular to the linkage handle (323). The support base (31) includes a first support platform (315) at the bottom. The first support platform (315) includes a handle groove (316) that cooperates with and limits the linkage handle (323) and a first groove (317) that cooperates with and limits the linkage bosses (324).

10. A rotary disconnect switch, characterized in that, The rotating contact assembly (101) according to any one of claims 1-9 further includes a housing (100), an operating mechanism (102), and at least one arc-extinguishing grid assembly (2), wherein the rotating contact assembly (101) and at least one arc-extinguishing grid assembly (2) are disposed within the housing (100), the operating mechanism (102) is connected to the rotating contact assembly (101) to drive the moving contact (1) to rotate, and at least one arc-extinguishing grid assembly (2) surrounds the side of the rotating contact assembly (101).

Images