rotary disconnector

Abstract

The rotary disconnector's switch unit housing includes a second sidewall and a fourth sidewall disposed opposite to each other. The second sidewall has a first notch, and the fourth sidewall has a third notch. A rotary contact assembly is located between the second and fourth sidewalls. A first stationary contact is located between the second sidewall and the rotary contact assembly, and a second stationary contact is located between the fourth sidewall and the rotary contact assembly. The first stationary contact includes a screw fixing plate and a first connecting plate connected at right angles. The first connecting plate includes a stationary contact plate extending and protruding from one side of the screw fixing plate. The stationary contact plate includes a first stationary contact portion protruding in a direction away from the plane where the screw fixing plate is located. The screw fixing plate is positioned parallel to the second sidewall outside the switch unit housing. This structure reduces the size of the rotary disconnector.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to 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.

[0003] Due to unreasonable layout and the requirement for reliable limiting of stationary contacts, the existing disconnect switches have a large stationary contact structure, resulting in a large size and poor aesthetics of the disconnect switches. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a small-volume rotary disconnect switch.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This application provides a rotary disconnect switch, including a stacked operating mechanism unit and at least one switch unit. The switch unit includes a rotary contact assembly, a first stationary contact, a second stationary contact, and an arc-extinguishing chamber structure disposed inside the switch unit housing. The rotary contact assembly includes a moving contact with clamping gaps at both ends. The operating mechanism unit includes an operating mechanism, and the output shaft of the operating mechanism is connected to the rotary contact assembly.

[0007] The switch unit housing includes a second sidewall and a fourth sidewall disposed opposite to each other. The second sidewall has a first notch for the first stationary contact to extend out, and the fourth sidewall has a third notch for the second stationary contact to extend out. The first stationary contact is located between the second sidewall and the rotary contact assembly, and the second stationary contact is located between the fourth sidewall and the rotary contact assembly. The first stationary contact includes a screw fixing plate and a first connecting plate that are bent at right angles and connected together. The first connecting plate includes a stationary contact plate that extends and protrudes from one side of the screw fixing plate. The stationary contact plate includes a first stationary contact portion that protrudes in a direction away from the plane where the screw fixing plate is located, for insertion into the clamping gap of the moving contact. The screw fixing plate has a screw hole and is placed outside the switch unit housing parallel to the second sidewall.

[0008] In one possible implementation, the second stationary contact includes a second stationary contact portion, a second connecting plate, and a second terminal block that are connected in sequence by bending at right angles. The second stationary contact portion, the second connecting plate, and the second terminal block are all located on the same plane, and the second stationary contact portion and the second terminal block are located on both sides of the width direction of the second connecting plate. The second stationary contact portion is used to insert into the clamping gap of the moving contact, and the second terminal block extends from the third notch of the fourth sidewall and is perpendicular to the fourth sidewall.

[0009] In one possible implementation, the first stationary contact portion of the first stationary contact is provided with a raised, elongated limiting rib at the connection between the first stationary contact portion and the stationary contact plate.

[0010] In one possible implementation, when the rotary contact assembly is in the closed position, the length direction of the moving contact is perpendicular to the second and fourth side walls; when the rotary contact assembly is in the open position, the length direction of the moving contact is parallel to the second and fourth side walls.

[0011] In one possible implementation, the switch unit housing includes an inner mounting structure for mounting the rotary contact assembly, the first stationary contact, the second stationary contact, and the arc-extinguishing chamber structure, and an outer mounting structure located on the back of the inner mounting structure. The operating mechanism unit housing includes the outer mounting structure. The outer mounting structure of the upper switch unit housing or the outer mounting structure of the operating mechanism unit housing is fixedly mounted to the inner mounting structure of the lower switch unit housing, forming a space for mounting the rotary contact assembly, the first stationary contact, the second stationary contact, and the arc-extinguishing chamber structure. The switch unit housing and the operating mechanism unit housing include a first limiting structure for limiting the first stationary contact and a second limiting structure for limiting the second stationary contact.

[0012] In one possible implementation, the first limiting structure includes a first retaining wall, a second retaining wall, a third retaining wall, a first limiting rib, a second limiting rib, and at least one first supporting rib located on the bottom surface of the inner mounting structure. The first limiting structure also includes at least one second supporting rib located on the outer mounting structure.

[0013] The first and second retaining walls are parallel, the second retaining wall is perpendicularly connected to the third retaining wall, the third retaining wall is located between the first and second retaining walls, and the first, second, and third retaining walls are all perpendicular to the bottom surface of the inner layer installation structure. The first gap is formed between the first and third retaining walls, and the second gap is formed between the second limiting rib and the second retaining wall.

[0014] The first and second retaining walls limit the two ends of the first connecting plate along its length. The third retaining wall limits the side of the static contact plate away from the first static contact portion. The first limiting rib and the second limiting rib limit the side of the first connecting plate away from the screw fixing plate. The screw fixing plate extends at least partially out of the first notch and connects to the load or power supply. The first static contact portion extends at least partially out of the second notch and connects to the moving contact. At least one first supporting rib limits the first surface of the first connecting plate, and at least one second supporting rib limits the second surface of the first connecting plate.

[0015] In one possible implementation, the second limiting structure includes a fourth, fifth, sixth, and seventh retaining wall located on the inner mounting structure, and at least one third supporting rib located on the bottom surface of the inner mounting structure. The second limiting structure also includes at least one fourth supporting rib located on the bottom surface of the outer mounting structure.

[0016] The fourth and fifth retaining walls are parallel to and perpendicular to the bottom surface of the inner layer mounting structure, and the sixth and seventh retaining walls are also parallel to and perpendicular to the bottom surface of the inner layer mounting structure. The fourth and seventh retaining walls are perpendicularly connected, and the fourth retaining wall and the sixth retaining wall are spaced apart to form the third gap. The fifth and sixth retaining walls are perpendicularly connected, and the fifth and seventh retaining walls form the fourth gap.

[0017] The fourth and fifth retaining walls limit the two ends of the second connecting plate in the length direction, the sixth and seventh retaining walls limit the two ends of the second connecting plate in the width direction, at least one third support rib and at least one fourth support rib limit the two sides of the second stationary contact in the width direction, the second terminal block extends out from the third notch and connects to the load or power supply, and the second stationary contact extends out from the fourth notch and connects to the moving contact.

[0018] In one possible implementation, the arc-extinguishing chamber structure includes a first arc-extinguishing grid group and a second arc-extinguishing grid group. The switch unit housing has a rectangular structure and further includes a first sidewall and a third sidewall. The first sidewall, second sidewall, third sidewall, and fourth sidewall are connected sequentially. A first arc-extinguishing chamber for accommodating the first arc-extinguishing grid group is formed at the angle between the first and second sidewalls, and a second arc-extinguishing chamber for accommodating the second arc-extinguishing grid group is formed at the angle between the third and fourth sidewalls.

[0019] The first arc-extinguishing chamber includes a first grid plate barrier wall and a second grid plate barrier wall that are parallel to the second side wall and spaced apart. The first arc-extinguishing grid plate group is located between the first grid plate barrier wall and the second grid plate barrier wall. The second arc-extinguishing chamber includes a third grid plate barrier wall and a fourth grid plate barrier wall that are parallel to the fourth side wall and spaced apart. The second arc-extinguishing grid plate group is located between the third grid plate barrier wall and the fourth grid plate barrier wall.

[0020] In one possible implementation, the first sidewall has a first vent hole at one end of the first arc-extinguishing chamber, and the second grid baffle is spaced apart from the first sidewall to form a first airflow gap, forming a first exhaust channel between the first vent hole and the first airflow gap; the third sidewall has a second vent hole at one end of the second arc-extinguishing chamber, and the fourth grid baffle is spaced apart from the third sidewall to form a second airflow gap, forming a second exhaust channel between the second vent hole and the second airflow gap.

[0021] In one possible implementation, a first functional space and a second functional space are provided on both sides of the first stationary contact, a third functional space is provided on one side of the second stationary contact, the first arc-extinguishing grid plate group is located between the first functional space and the third functional space, and the second arc-extinguishing grid plate group is located between the second stationary contact and the second functional space.

[0022] In one possible implementation, the first functional space is connected to the first vent.

[0023] In one possible implementation, the side of the first stationary contact facing the outer mounting structure is provided with a limiting rib.

[0024] In one possible implementation, the operating mechanism unit further includes an operating mechanism unit housing, which includes a housing cover and a housing base. The operating mechanism is mounted on the housing base, and the housing cover is fitted onto the housing base. The operating mechanism includes an operating shaft, an energy storage mechanism, and an output shaft that are rotatably arranged around their own axis. The housing cover has a cover shaft hole in the middle, and a disassembly cover plate is disposed in the cover shaft hole. The disassembly cover plate is snap-fitted to the cover shaft hole. The disassembly cover plate has a cover plate shaft hole in the middle for the operating shaft to pass through. The operating shaft passes through the cover plate shaft hole to form an operating end for operation. The operating end has a limiting protrusion protruding radially. The cover plate shaft hole includes at least one first clearance notch for avoiding at least one of the limiting protrusions. The housing cover includes at least one mounting protrusion for installation corresponding to at least one first clearance notch and at least one second clearance notch for avoiding at least one of the limiting protrusions. After the disassembly cover plate is fixedly installed in the cover shaft hole through the operating shaft, the mounting protrusion is embedded in the first clearance notch.

[0025] Compared to existing technologies, in this application, the first stationary contact of the switch unit housing extends from the second side wall, and the second stationary contact extends from the fourth side wall. The first stationary contact is located between the second side wall and the rotary contact assembly, and the second stationary contact is located between the fourth side wall and the rotary contact assembly, near the wiring position of the switch unit. The first stationary contact includes a screw fixing plate and a first connecting plate that are bent at right angles. The first connecting plate includes a stationary contact plate that protrudes from one side of the screw fixing plate. The stationary contact plate includes a first stationary contact portion that extends in a direction away from the plane where the screw fixing plate is located. This structural design reduces the volume of the first stationary contact, thereby reducing the volume of the rotary disconnect switch.

[0026] In addition, the side of the first stationary contact facing the outer mounting structure is provided with a limiting rib. After the outer and inner mounting structures are installed, the outer mounting structure abuts against the limiting rib, providing clamping force in the thickness direction of the first stationary contact. This can enhance the airtightness of the switch unit housing and prevent the first stationary contact from being unable to be pressed due to structural errors in the outer and inner mounting structures, thus causing air leakage and affecting the normal use of the switch unit. Attached Figure Description

[0027] Figure 1 and Figure 2 This is a schematic diagram of the structure of the rotary disconnect switch of this utility model;

[0028] Figure 3 This is a schematic diagram of the internal structure of the switching unit of this utility model;

[0029] Figure 4 This is a schematic diagram of the inner layer mounting structure of the switch unit of this utility model;

[0030] Figure 5 This is a schematic diagram of the outer mounting structure of the switch unit of this utility model;

[0031] Figure 6 and Figure 7 This is a schematic diagram of the structure of the first stationary contact of this utility model;

[0032] Figure 8 This is a schematic diagram of the structure of the second stationary contact of this utility model;

[0033] Figure 9 This is an exploded view of the operating mechanism unit of this utility model;

[0034] Figure 10 This is a schematic diagram of the structure of the disassembled cover plate of this utility model;

[0035] Figure 11 and Figure 12 This is a schematic diagram of the structure of the present invention, showing that the operating shaft and the rotating frame are integrally formed.

[0036] Figure 13 This is a schematic diagram of the output shaft of this utility model;

[0037] Figure 14 This is a cross-sectional view of the screw and the embedded nut of this utility model.

[0038] Figure 15 This is a schematic diagram of the structure of the base of the operating mechanism unit housing of this utility model;

[0039] The reference numerals in the attached figures include:

[0040] Operating mechanism unit 1;

[0041] 101 housing base; 103 housing top cover;

[0042] Second buckle barb 1011; First opening limit groove side 1012; Second opening limit groove side 1013; Transition arc surface 1014; First closing limit groove side 1015; Second closing limit groove side 1016; Opening limit groove 1017; Closing limit groove 1018.

[0043] Top cover shaft hole 1031; disassembly cover plate 1032; limiting protrusion 1033; first clearance notch 1034; installation protrusion 1035; second buckle through hole 1036; first buckle barb 1039;

[0044] Output shaft 111; sliding bracket 112;

[0045] Output shaft positioning post 1110; sliding boss 1112;

[0046] 1120 Sliding frame base plate; 1123 Sliding frame limit end; 1124 Sliding frame slide groove; 1125 Closing sliding frame arm; 1126 Opening sliding frame arm; 1127 Base assembly groove; 1128 Base recess; 1129 Base shaft hole.

[0047] Operating shaft 1131; first energy storage spring 1133; rotating frame 1134; rotating frame positioning hole 1135; rotating frame base plate 1137; closing rotating frame arm 1136; opening rotating frame arm 1138;

[0048] Switching unit 2;

[0049] Rotary contact assembly 21; First stationary contact 22; Second stationary contact 23;

[0050] Screw fixing plate 221; First connecting plate 222; Static contact plate 223; Limiting rib 226;

[0051] First retaining wall 2241; Second retaining wall 2242; Third retaining wall 2243; First limiting rib 2244; Second limiting rib 2245; First supporting rib 2246; First notch 2247; Second notch 2248;

[0052] Second static contact part 231; second connecting plate 232; second wiring plate 233; fourth retaining wall 234; fifth retaining wall 235; sixth retaining wall 236; seventh retaining wall 237; third supporting rib 238; fourth supporting rib 239;

[0053] First sidewall 241; Second sidewall 242; Third sidewall 243; Fourth sidewall 244; First grid retaining wall 245; Second grid retaining wall 246; Third grid retaining wall 247; Fourth grid retaining wall 248;

[0054] First air outlet 2411; First airflow notch 2412; Second air outlet 2431;

[0055] Third gap 251; Second supporting rib 2251; Fourth gap 252;

[0056] First arc-extinguishing grid group 31; Second arc-extinguishing grid group 32; First functional space 33; Second functional space 34; Second functional space 35;

[0057] Insulating side plate 41; screw clearance groove 42; insulating plate 44;

[0058] Screw 51; First fixing post 52; Second fixing post 53; Embedded nut 54. Detailed Implementation

[0059] 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.

[0060] refer to Figure 1 The rotary disconnect switch includes an operating mechanism unit 1 and a switch unit 2 stacked together. The operating mechanism unit 1 includes an operating mechanism unit housing and an operating mechanism disposed within the operating mechanism unit housing, such as... Figure 3 As shown, the switching unit 2 includes a switching unit housing and a rotating contact assembly 21, a stationary contact, and an arc-extinguishing chamber structure disposed inside the switching unit housing. The rotating contact assembly 21 includes a moving contact. The stationary contact is fixedly installed on the housing, and the moving contact is rotatably disposed. The output shaft of the operating mechanism extends out of the operating mechanism unit housing and connects to the rotating contact assembly 21, driving the rotating contact assembly 21 to rotate between the closed position and the open position, thereby causing the moving contact to connect or disconnect with the first stationary contact 22 and the second stationary contact 23. The arc-extinguishing chamber structure is located on one side of the rotating contact assembly 21 and is used to extinguish the electric arc generated at the moment the moving contact and the stationary contact are disconnected or closed. The moving contact is a long plate-shaped structure, rotatably mounted in the middle, with clamping gaps at both ends. The moving contact is clamped and connected to the stationary contact through the clamping gaps at both ends (in this application, the clamping gaps at both ends are respectively clamped and connected to the first stationary contact 22 and the second stationary contact 23). When the moving contact rotates to a certain angle, its end can contact and close with the stationary contact, realizing the circuit conduction. When the moving contact rotates again, it can disconnect from the stationary contact, realizing the circuit disconnection. The rotary disconnecting switch is usually connected in series in the circuit, and the connection and disconnection of the moving contact and the stationary contact control the conduction and disconnection of the circuit. In this embodiment, the rotary disconnecting switch includes two stationary contacts, and the two ends of the moving contact are respectively clamped and cooperated with the two stationary contacts to control the conduction and disconnection of the circuit. This is prior art in this field.

[0061] like Figures 1-3 and Figure 6As shown, this application provides a rotary disconnect switch, including at least one stacked switch unit 2. The switch unit 2 has a first stationary contact 22 and a second stationary contact 23 inside. The first stationary contact 22 and the second stationary contact 23 are located on both sides of a rotary contact assembly 21 and on opposite sides of the switch unit housing. The switch unit housing includes a second sidewall 242 and a fourth sidewall 244 disposed opposite to each other. The second sidewall 242 has a first notch 2247 for the first stationary contact 22 to extend out, and the fourth sidewall 244 has a third notch 251 for the second stationary contact 23 to extend out. The rotary contact assembly is located on... Between the second sidewall 242 and the fourth sidewall 244, the first stationary contact 22 is located between the second sidewall 242 and the rotating contact assembly, and the second stationary contact 23 is located between the fourth sidewall 244 and the rotating contact assembly. When the rotating contact assembly is in the closed position, preferably the length direction of the moving contact is perpendicular to the second sidewall 242 and the fourth sidewall 244 where the first notch 2247 and the third notch 251 are located. When the rotating contact assembly is in the open position, the length direction of the moving contact is parallel to the second sidewall 242 and the fourth sidewall 244 where the first notch 2247 and the third notch 251 are located. Of course, the moving contact can be slightly tilted when closing or opening the circuit. When closing the circuit, the angle between the length direction of the moving contact and the second side wall 242 and the fourth side wall 244 where the first notch 2247 and the third notch 251 are located is not 90°. When opening the circuit, the length direction of the moving contact is not parallel to the second side wall 242 and the fourth side wall 244 where the first notch 2247 and the third notch 251 are located.

[0062] The first stationary contact 22 includes a screw fixing plate 221 and a first connecting plate 222 connected at right angles. The first connecting plate 222 includes a stationary contact plate 223 extending and protruding from one side of the screw fixing plate 221. The stationary contact plate 223 includes a first stationary contact portion extending in a direction away from the plane of the screw fixing plate 221 for insertion into the clamping gap of the moving contact. The screw fixing plate 221 has a screw hole and is positioned outside the switch unit housing parallel to the second sidewall 242. That is, the first stationary contact portion and the screw fixing plate 221 are located on both sides of the width direction of the first connecting plate 222, and the screw fixing plate 221 includes a screw hole for the screw to pass through. There is an arc-shaped transition area between the side of the first connecting plate 222 away from the screw fixing plate 221 and the first stationary contact portion. This structural design reduces the volume of the first stationary contact 22, thereby reducing the volume of the rotary disconnect switch.

[0063] Preferred, such as Figure 8As shown, the second stationary contact 23 includes a second stationary contact portion 231, a second connecting plate 232, and a second terminal block 233 connected in sequence at right angles. The second stationary contact portion 231, the second connecting plate 232, and the second terminal block 233 are all located on the same plane, and the second stationary contact portion 231 and the second terminal block 233 are located on both sides of the width direction of the second connecting plate 232. The second stationary contact portion 231 is used to insert into the clamping gap of the moving contact. The second terminal block 233 extends out from the third notch 251 of the fourth side wall 244 and is perpendicular to the fourth side wall 244.

[0064] Preferred, such as Figures 1-5 As shown, the switch unit housing includes an inner mounting structure for mounting the rotary contact assembly 21, the first stationary contact 22, the second stationary contact 23, and the arc-extinguishing chamber structure, and an outer mounting structure located on the back of the inner mounting structure. The operating mechanism unit housing includes the outer mounting structure. The outer mounting structure of the upper switch unit housing or the outer mounting structure of the operating mechanism unit housing is fixedly mounted to the inner mounting structure of the lower switch unit housing, forming a space for mounting the rotary contact assembly 21, the first stationary contact 22, the second stationary contact 23, and the arc-extinguishing chamber structure.

[0065] Preferably, the switch unit housing and the operating mechanism unit housing include a first limiting structure for limiting the first stationary contact 22 and a second limiting structure for limiting the second stationary contact 23.

[0066] Furthermore, such as Figure 4 and Figure 5 As shown, the first limiting structure includes a first retaining wall 2241, a second retaining wall 2242, a third retaining wall 2243, a first limiting rib 2244, a second limiting rib 2245 located within the inner mounting structure, and at least one first supporting rib 2246 located on the bottom surface of the inner mounting structure. The first limiting structure also includes at least one second supporting rib 2251 located within the outer mounting structure.

[0067] The first retaining wall 2241 and the second retaining wall 2242 are parallel. The second retaining wall 2242 is perpendicularly connected to the third retaining wall 2243. The third retaining wall 2243 is located between the first retaining wall 2241 and the second retaining wall 2242. The first retaining wall 2241, the second retaining wall 2242 and the third retaining wall 2243 are all perpendicular to the bottom surface of the inner layer mounting structure. The first gap 2247 is formed between the first retaining wall 2241 and the third retaining wall 2243. The second gap 2248 is formed between the second limiting rib 2245 and the second retaining wall 2242.

[0068] like Figure 3 and Figure 5As shown, after the outer and inner mounting structures are installed, the first retaining wall 2241 and the second retaining wall 2242 limit the two ends of the first connecting plate 222 along its length. The third retaining wall 2243 limits the side of the stationary contact plate 223 away from the first stationary contact portion. The first limiting rib 2244 and the second limiting rib 2245 limit the side of the first connecting plate 222 away from the screw fixing plate 221. The screw fixing plate 221 extends at least partially out of the first notch 2247 to connect with the load or power supply. The first stationary contact portion extends at least partially out of the second notch 2248 to connect with the moving contact. At least one first supporting rib 2246 limits the first surface of the first connecting plate 222, and at least one second supporting rib 2251 limits the second surface of the first connecting plate 222. Of course, the first limiting structure can also be other structures used to limit the first stationary contact 22.

[0069] Furthermore, such as Figure 4 and Figure 5 As shown, the second limiting structure includes a fourth retaining wall 234, a fifth retaining wall 235, a sixth retaining wall 236, a seventh retaining wall 237 located on the inner layer mounting structure, and at least one third supporting rib 238 located on the bottom surface of the inner layer mounting structure. The second limiting structure also includes at least one fourth supporting rib 239 located on the bottom surface of the outer layer mounting structure.

[0070] The fourth retaining wall 234 and the fifth retaining wall 235 are parallel to and perpendicular to the bottom surface of the inner layer mounting structure, and the sixth retaining wall 236 and the seventh retaining wall 237 are parallel to and perpendicular to the bottom surface of the inner layer mounting structure. The fourth retaining wall 234 and the seventh retaining wall 237 are vertically connected. The fourth retaining wall 234 and the sixth retaining wall 236 form the third gap 251 at intervals. The fifth retaining wall 235 and the sixth retaining wall 236 are vertically connected. The fourth gap 252 is formed between the fifth retaining wall 235 and the seventh retaining wall 237.

[0071] like Figure 3 As shown, after the outer and inner mounting structures are installed, the fourth retaining wall 234 and the fifth retaining wall 235 limit the two ends of the second connecting plate 232 in the length direction, the sixth retaining wall 236 and the seventh retaining wall 237 limit the two ends of the second connecting plate 232 in the width direction, and at least one third support rib 238 and at least one fourth support rib 239 limit the two sides of the second stationary contact 23 in the width direction. The second terminal block 233 extends from the third notch 251 and connects to the load or power supply, and the second stationary contact 231 extends from the fourth notch 252 and connects to the moving contact. The second terminal block 233 can be connected to the load or power supply by welding or riveting. Of course, the second limiting structure can also be other structures used to limit the second stationary contact 23.

[0072] Preferred, such as Figure 7As shown, the first stationary contact 22 has a raised, elongated limiting rib 226 on the side facing the outer mounting structure. The limiting rib 226 is located at the connection between the first stationary contact portion and the stationary contact plate 223. After the outer and inner mounting structures are installed, the outer mounting structure abuts against the limiting rib 226, providing clamping force in the thickness direction of the first stationary contact 22. This enhances the airtightness of the switch unit housing and prevents the first stationary contact 22 from being unable to be pressed tightly due to structural errors in the outer and inner mounting structures, thus preventing air leakage and affecting the normal use of the switch unit 2. Similarly, the second stationary contact 23 can also have a limiting rib 226 on the side facing the outer mounting structure.

[0073] Preferably, the rotary contact assembly includes a support base and a support cover stacked together. The moving contact is located within the support base, and the support cover covers the support base to form a cylindrical rotary contact assembly. The rotary contact assembly has an arc-shaped arc-blocking groove in its radial direction. The moving contact includes two moving contact pieces stacked together, with their ends spaced apart in the longitudinal direction to form a clamping gap. The first stationary contact portion of the first stationary contact 22 and the second stationary contact portion 231 of the second stationary contact 23 both extend into the arc-blocking groove to cooperate with the moving contact. The clamping gaps at both ends of the moving contact are also located within the arc-blocking groove. The connection or disconnection between the first stationary contact portion and the moving contact occurs within the arc-blocking groove, which enhances insulation performance and improves arc-extinguishing efficiency. When the rotary contact assembly rotates, the arc-blocking groove avoids the first stationary contact portion.

[0074] Preferably, the rotary contact assembly has two separate arc-blocking grooves in the radial direction, and the sector angle corresponding to each arc-blocking groove is approximately 90 degrees; of course, in other embodiments, the arc-blocking grooves can be longer, or only one connected arc-shaped groove can be provided.

[0075] Preferred, such as Figure 3 As shown, the arc-extinguishing chamber structure includes a first arc-extinguishing grid plate group 31 and a second arc-extinguishing grid plate group 32. The switch unit housing has a rectangular structure. The first limiting structure also includes a first side wall 241 and a third side wall 243. The first side wall 241, the second side wall 242, the third side wall 243, and the fourth side wall 244 are connected in sequence. The angle between the first side wall 241 and the second side wall 242 forms a first arc-extinguishing chamber for accommodating the first arc-extinguishing grid plate group 31, and the angle between the third side wall 243 and the fourth side wall 244 forms a second arc-extinguishing chamber for accommodating the second arc-extinguishing grid plate group 32.

[0076] The first arc-extinguishing chamber includes a first grid baffle 245 and a second grid baffle 246 that are parallel to the second sidewall 242 and spaced apart. The first arc-extinguishing grid assembly 31 is located between the first grid baffle 245 and the second grid baffle 246. The second arc-extinguishing chamber includes a third grid baffle 247 and a fourth grid baffle 248 that are parallel to the fourth sidewall 244 and spaced apart. The second arc-extinguishing grid assembly 32 is located between the third grid baffle 247 and the fourth grid baffle 248.

[0077] Furthermore, such as Figure 3 As shown, the first sidewall 241 has a first vent 2411 at one end of the first arc-extinguishing chamber, and the second grid baffle 246 is spaced apart from the first sidewall 241 to form a first airflow notch 2412, forming a first exhaust channel between the first vent 2411 and the first airflow notch 2412; the third sidewall 243 has a second vent 2431 at one end of the second arc-extinguishing chamber, and the fourth grid baffle 248 is spaced apart from the third sidewall 243 to form a second airflow notch, forming a second exhaust channel between the second vent 2431 and the second airflow notch.

[0078] The first and second exhaust channels are used to discharge the high-temperature gas generated by the electric arc through the exhaust port, preventing high temperature damage to the internal components of the switch unit 2 and reducing the service life of the switch unit 2, thus effectively ensuring the reliable and stable operation of the switch unit 2.

[0079] Preferred, such as Figure 3 As shown, the first stationary contact 22 has a first functional space 33 and a second functional space 34 on both sides, and the second stationary contact 23 has a third functional space 35 on one side. The first arc-extinguishing grid assembly 31 is located between the first functional space 33 and the third functional space 35, and the second arc-extinguishing grid assembly 32 is located between the second stationary contact 23 and the second functional space 34. The first functional space 33, the second functional space 34, and the third functional space 35 can be used to set new functional units, increasing the functionality of the switching unit. Preferably, the first functional space 33 is connected to the first vent 2411, providing a buffer space to prevent the high-temperature gas generated by the electric arc from failing to be discharged in time and causing it to flow back to the first airflow gap 2412.

[0080] Preferred, such as Figure 1 As shown, an insulating side plate 41 is provided on the side of the switch unit housing where the first stationary contact 22 is located. The insulating side plate 41 extends outward from the bottom of the switch unit housing perpendicular to the housing stacking direction. The insulating side plate 41 is used to insulate the screw fixing plate 221 of the adjacent switch unit 2 to prevent short circuit.

[0081] Furthermore, a screw clearance groove 42 is provided at the position where the insulating side plate 41 contacts the screw fixing plate 221, which is used to avoid the screw during screw installation and facilitates screw installation.

[0082] Furthermore, in a preferred embodiment, at least one side of the insulating side plate 41 is provided with at least one structural reinforcing rib (not shown in the figure), and the structural reinforcing rib is connected to the switch unit housing to enhance the structural strength of the insulating side plate 41.

[0083] Preferred, such as Figure 2 As shown, the location of the third notch 251 in the switch unit housing includes an insulating plate 44. The second terminal plate 233 of the second stationary contact 23 extends to the outside of the switch unit housing and is separated by the insulating plate 44, thereby enhancing the insulation protection effect of the second stationary contact 23. The insulating plate 44 is preferably... Figure 2 The arc shape shown partially surrounds the second terminal block 233.

[0084] Furthermore, the insulating plates 44 of adjacent switch units 2 are staggered along the stacking direction of switch units 2, increasing the creepage distance between the upper and lower second stationary contacts 23 in the stacking direction, thereby improving the safety of use.

[0085] like Figure 9 As shown, the operating mechanism unit housing includes a housing cover 103 and a housing base 101. The operating mechanism is mounted on the housing base 101, and the housing cover 103 covers the housing base 101.

[0086] The operating mechanism includes an operating shaft 1131 rotatably mounted around its own axis, an energy storage mechanism, and an output shaft 111. The output shaft 111 is connected to the rotary contact assembly 21. The operating shaft 1131 drives the energy storage mechanism to store energy and then release energy to drive the output shaft 111 to rotate. The energy storage mechanism includes a first energy storage spring 1133. The operating shaft 1131 rotates between the open and closed positions, driving the first energy storage spring 1133 to store energy and then release energy after passing the equilibrium position to drive the operating shaft 1131 to rotate rapidly, realizing the rapid switching of the operating mechanism between the open and closed states. The rotation of the operating shaft 1131 drives the switching unit 2 to quickly disconnect or connect the circuit. When the operating shaft 1131 rotates from the closed position to the open position, the energy storage mechanism drives the operating mechanism to switch to the open state. When the operating shaft 1131 switches from the open position to the closed position, the energy storage mechanism drives the operating mechanism to switch to the closed state.

[0087] The upper cover 103 of the housing has a cover shaft hole 1031 in the middle, and a disassembly cover plate 1032 is provided in the upper cover shaft hole 1031. The disassembly cover plate 1032 has a cover plate shaft hole in the middle for the operation shaft 1131 to pass through. The operation shaft 1131 passes through the cover plate shaft hole to form an operation end for operation. The operation end has a limiting protrusion 1033 protruding radially (e.g., Figure 1 As shown in the figure, the operating end and the limiting protrusion 1033 are used to install the operating handle (not shown in the figure). The cover plate shaft hole of the disassembly cover plate 1032 includes at least one first clearance notch 1034 for avoiding at least one of the limiting protrusions 1033. The housing cover 103 includes at least one mounting protrusion 1035 for corresponding installation with at least one first clearance notch 1034 and at least one second clearance notch for avoiding at least one of the limiting protrusions 1033. After the disassembly cover plate 1032 is fixedly installed in the upper cover shaft hole 1031 through the operating shaft 1131, the mounting protrusion 1035 is embedded in the first clearance notch 1034, and the operating shaft 1131 cannot be withdrawn from the upper cover shaft hole 1031 by blocking the limiting protrusion 1033. In a preferred embodiment of this application, the operating end is provided with a mounting hole in the radial direction, the mounting post passes through the mounting hole, and at least one end extends out of the mounting hole to form the limiting protrusion 1033.

[0088] The disassembly cover 1032 passes through the cover shaft hole and is installed in the upper cover shaft hole 1031. At least one of the first clearance notches 1034 and at least one mounting protrusion 1035 are engaged for installation. Without removing the disassembly cover 1032, the operating shaft 1131 cannot be pulled out from the cover shaft hole due to the presence of at least one limiting protrusion 1033. In this embodiment, the mounting post is riveted in the mounting hole and is not easy to pull out. Therefore, the disassembly cover 1032 is provided to facilitate the disassembly and installation of the operating mechanism unit 1. In the event of incorrect dimensions of the operating mechanism or defects in the appearance of the housing upper cover 103 or housing base 101, it is convenient to replace parts.

[0089] Preferably, the disassembly cover 1032 is snap-fitted into the upper cover shaft hole 1031. For example... Figure 10 As shown, the side of the disassembly cover plate 1032 facing the upper cover shaft hole 1031 is provided with a plurality of first snap hooks 1039. The cover plate shaft hole includes a plurality of first snap through holes. The plurality of first snap hooks 1039 are inserted into the plurality of first snap through holes to complete the snap installation of the disassembly cover plate 1032 and the upper cover shaft hole 1031, making disassembly and installation more convenient.

[0090] Preferred, such as Figure 9As shown, the housing base 101 and the housing cover 103 are snap-fitted together. The housing base 101 includes at least one second snap-fit ​​barb 1011 extending towards the housing cover 103, and the housing cover 103 includes at least one second snap-fit ​​through hole 1036. The at least one second snap-fit ​​barb 1011 extends into the at least one second snap-fit ​​through hole 1036, thus completing the snap-fit ​​installation of the housing base 101 and the housing cover 103, making disassembly and installation more convenient.

[0091] Preferred, such as Figure 14 As shown, the operating mechanism unit 1 and at least one switch unit 2 are fixedly mounted by at least one screw 51 passing through the stacking direction.

[0092] like Figure 9 As shown, the operating mechanism unit housing includes at least one first fixing post 52, and the first fixing post 52 includes a first through hole extending along the stacking direction; as Figure 4 and Figure 5 As shown, the switch unit housing includes at least one second fixing post 53, the second fixing post 53 including a second through hole extending along the stacking direction, at least one first fixing post 52 and at least one second fixing post 53 corresponding to and connected along the stacking direction, similarly, at least one second through hole and at least one first through hole corresponding to and connected along the stacking direction, and an embedded nut 54 is fixed in the second through hole of the switch unit housing away from the operating mechanism unit housing in the stacked arrangement (e.g., Figure 14 As shown in the figure, the screw 51 passes through the first through hole and at least one second through hole in sequence and is then fixedly connected to the embedded nut 54, which improves the installation and fixing effect.

[0093] like Figure 9As shown, the energy storage mechanism is mounted on the housing base 101. The energy storage mechanism also includes a rotating frame 1134 integrally formed with the sliding frame 112 and the operating shaft 1131. The first energy storage spring 1133 connects the sliding frame 112 and the rotating frame 1134. The sliding frame 112 is rotatably disposed and can be translatably slidably disposed. The sliding frame 112 has two locking positions, and in each of the two locking positions, it is locked to the housing base 101 to prevent the sliding frame 112 from rotating. The operating shaft 1131 drives the rotating frame 1134 to rotate relative to the sliding frame 112. The sliding frame 112 is limited and engages with the first energy storage spring 1133 to store energy. The sliding frame 112 has two locking positions, and in each of these positions, it is locked to the housing base 101 to prevent rotation. The operating shaft 1131 continues to rotate and drives the sliding frame 1134 to slide relative to the housing base 101 in one locking position, thus releasing the lock. The first energy storage spring 1133 releases energy, driving the sliding frame 112 to rotate and slide into the other locking position. Simultaneously, the sliding frame 112 drives the output shaft 111 to rotate. Further, the output shaft 111 is rotatably mounted on the housing base 101 around its own axis. The sliding frame 112 rotates synchronously with the output shaft 111 and slides relative to both the housing base 101 and the output shaft 111. Figure 15 As shown, the housing base 101 includes two limiting slots spaced apart along the rotation direction of the output shaft 111, namely the opening limiting slot 1017 and the closing limiting slot 1018; the sliding frame 112 is locked in one position and engaged with one limiting slot. The operating shaft 1131 drives the rotating frame 1134 to rotate relative to the sliding frame 112 until the rotating frame 1134 is engaged with the sliding frame 112, and at the same time, the first energy storage spring 1133 stores energy. The operating shaft 1131 continues to rotate so that the rotating frame 1134 drives the sliding frame 112 to slide relative to the housing base 101 and disengage from the limiting slot. The first energy storage spring 1133 releases energy and drives the sliding frame 112 to rotate and slide into the other limiting slot, so that the sliding frame 112 reaches another locking position. At the same time, the sliding frame 112 drives the output shaft 111 to rotate, and the output shaft 111 drives the switch unit 2 to close or open the circuit.

[0094] Furthermore, the operating shaft 1131 rotates between the closed and open positions to allow the sliding frame 112 to switch between the two limit slots. Specifically, as shown... Figure 9 and Figure 15As shown, the operating shaft 1131 is in the open position and the sliding frame 112 is in a limiting engagement with the open limit groove 1017. An external force causes the operating shaft 1131 to rotate clockwise. The operating shaft 1131 drives the rotating frame 1134 to rotate relative to the sliding frame 112, while simultaneously storing energy in the first energy storage spring 1133. This continues until the rotating frame 1134 is in a limiting engagement with the sliding frame 112 (e.g., contact limit). The operating shaft 1131 continues to rotate clockwise, driving the sliding frame 112 to slide relative to the output shaft 111 through the rotating frame 1134, thus disengaging it from the open limit groove 1017. The first energy storage spring 1133 then releases energy and drives the sliding frame 112 to rotate clockwise before sliding into the closing limit position. Inside slot 1018; the operating shaft 1131 is in the closed position and the sliding frame 112 is in a limiting engagement with the closed limit slot 1018. An external force causes the operating shaft 1131 to rotate counterclockwise. The operating shaft 1131 drives the rotating frame 1134 to rotate relative to the sliding frame 112, while simultaneously storing energy in the first energy storage spring 1133, until the rotating frame 1134 contacts and engages with the sliding frame 112. The operating shaft 1131 continues to rotate counterclockwise, driving the sliding frame 112 relative to the output shaft 111 through the rotating frame 1134 to disengage from the closed limit slot 1018. The first energy storage spring 1133 begins to release energy and drives the sliding frame 112 to rotate counterclockwise before sliding into the open limit slot 1017.

[0095] like Figure 9 As shown, one end of the operating shaft 1131 is integrally formed and connected to the rotating frame 1134, and the other end passes through the upper cover 103 of the housing to form the operating end. The first energy storage spring 1133 is a torsion spring and is rotatably sleeved on the operating shaft 1131. Furthermore, the first energy storage spring 1133, the rotating frame 1134, the output shaft 111, and the operating shaft 1131 are coaxially arranged, and the first energy storage spring 1133, the rotating frame 1134, the sliding frame 112, and the output shaft 111 are arranged sequentially; the sliding frame 112 slides radially along the output shaft 111. The operating shaft 1131 is integrally formed and connected to the rotating frame 1134. Compared to the prior art, the rotating frame 1134 and the operating shaft 1131 are fixedly connected by a riveting process, reducing process steps, saving parts, and improving production efficiency.

[0096] In other embodiments, the first energy storage spring 1133 can also be other types of springs, such as compression springs. Two compression springs are symmetrically arranged at both ends of the rotating frame 1134 and are rotatably connected to it. This structure will increase the volume of the energy storage mechanism and occupy more installation space.

[0097] Preferably, in other embodiments, the energy storage mechanism further includes a second bushing (not shown in the figure). The second bushing is rotatably sleeved on the operating shaft 1131 and inserted between the first energy storage spring 1133 and the operating shaft 1131. This can effectively prevent the first energy storage spring 1133 from seizing when twisted, and can better fix the first energy storage spring 1133, prevent it from deflecting, and ensure the reliable and stable operation of the energy storage mechanism.

[0098] Furthermore, the first energy storage spring 1133 includes a second spring helix rotatably sleeved on the operating shaft 1131. The two ends of the second spring helix are flush with or located between the two ends of the second bushing, respectively, to maximize the separation between the first energy storage spring 1133 and the operating shaft 1131, thereby preventing the first energy storage spring 1133 from seizing the operating shaft 1131 and ensuring reliable operation of the energy storage mechanism. Specifically, one end of the second bushing abuts against the rotating frame 1134, and the other end abuts against the limiting platform on the operating shaft 1131; one end of both the second bushing and the second spring helix of the first energy storage spring 1133 abuts against the rotating frame 1134, and the other end of the second bushing protrudes outside the other end of the second spring helix or is flush with both.

[0099] like Figure 11 As shown, the rotating frame 1134 has a U-shaped structure, which includes a rotating frame base plate 1137 and two oppositely arranged rotating frame arms; as Figure 10-14 As shown, the sliding frame 112 has a U-shaped structure, which includes a sliding frame base plate 1120 and two oppositely arranged sliding frame arms; Figure 10-12 As shown, two rotating arms are located between two sliding arms. The first energy storage spring 1133 includes a second spring helix and two second spring elastic arms connected to the second spring helix. The two second spring elastic arms are preferably located on the same plane. The rotating arms and sliding arms are located on the same side of the line connecting the two second spring elastic arms. One rotating arm and one sliding arm are located side-by-side on one radial side of the operating shaft 1131 and cooperate with one of the second spring elastic arms of the first energy storage spring 1133. Another rotating arm 1136 and another sliding arm are located on the other radial side of the operating shaft 1131 and cooperate with the other second spring elastic arm of the first energy storage spring 1133. The first energy storage spring 1133 applies a force to the sliding frame 112 to prevent it from disengaging from the limiting groove. Specifically, as shown... Figure 11 As shown, the two rotating arms of the rotating frame 1134 are the closing rotating frame arm 1136 and the opening rotating frame arm 1138, respectively; as Figure 9 As shown, the two sliding arms of the sliding frame 112 are the closing sliding frame arm 1125 and the opening sliding frame arm 1126, respectively; the two ends of the first energy storage spring 1133 are the first end of the second spring and the second end of the second spring, respectively.

[0100] like Figure 9 As shown, the first end of the second spring and the second end of the second spring are located on the same side of the rotating arm and the sliding arm. The first end of the second spring cooperates with the closing rotating arm 1136 and the closing sliding arm 1125 arranged side by side, and the second end of the second spring cooperates with the opening rotating arm 11343 and the opening sliding arm 1126 arranged side by side; combined with Figure 15 As shown, when the operating shaft 1131 rotates from the open position to the closed position (preferably clockwise), the operating shaft 1131 drives the rotating frame 1134 to rotate. The closing rotating frame arm 1136 presses against the first end of the second spring, causing the first energy storage spring 1133 to twist and store energy, until the rotating frame 1134 contacts the closing sliding frame arm 1125 of the sliding frame 112. At the same time, the opening rotating frame arm 1138 moves away from the second end of the second spring. The operating shaft 1131 continues to rotate and passes through the rotating frame 1134. 34 Drive the sliding frame 112 to slide relative to the output shaft 111 to disengage from the opening limit groove 1017. The first energy storage spring 1133 starts to release energy. The second end of the second spring presses against the opening sliding frame arm 1126 to make the sliding frame 112 rotate until the sliding frame 112 slides into the closing limit groove 1018. The second end of the second spring cooperates with the opening rotating clamp arm 1138 again. The sliding frame 112 simultaneously drives the output shaft 111 to rotate. The output shaft 111 drives the switch unit 2 to close the circuit. When the operating shaft 1131 rotates from the closed position to the open position (preferably counterclockwise), the operating shaft 1131 drives the rotating frame 1134 to rotate. The opening rotating frame arm 1138 presses against the second end 1132 of the second spring, causing the first energy storage spring 1133 to twist and store energy, until the rotating frame 1134 contacts the opening sliding frame arm 1126 of the sliding frame 112. At the same time, the closing rotating frame arm 1136 moves away from the first end of the second spring, and the operating shaft 1131 continues to rotate and pass through the rotating frame 1134. 34 drives the sliding frame 112 to slide relative to the output shaft 111 to disengage from the closing limit groove 1018. The first energy storage spring 1133 begins to release energy, and the first end of the second spring presses against the closing sliding frame arm 1125 to make the sliding frame 112 rotate until the sliding frame 112 slides into the opening limit groove 1017. The first end of the second spring cooperates with the closing rotating frame arm 1136 again. The sliding frame 112 simultaneously drives the output shaft 111 to rotate, and the output shaft 111 drives the switching unit 2 to disconnect the circuit.

[0101] like Figure 11 As shown, a rotating frame drive unit is provided at one end of the rotating frame base plate 1137 of the rotating frame 1134. The rotating frame drive unit presses against the sliding frame arm of the sliding frame 112 and drives the sliding frame 112 to slide relative to the housing base 101 so as to disengage from the limiting groove of the housing base 101.

[0102] like Figure 15As shown, the housing base 101 also includes a transition arc surface 1014, with its two ends connected to the opening limit groove 1017 and the closing limit groove 1018, respectively. The sliding bracket 112 slides across the transition arc surface 1014 to switch between the opening limit groove 1017 and the closing limit groove 1018. Further, as... Figure 9 As shown, the sliding frame base plate 1120 of the sliding frame 112 includes a sliding frame limiting end 1123 disposed at one end thereon. The end face of the sliding frame limiting end 1123 is a sliding frame arc surface that cooperates with the transition arc surface 1014, ensuring that the sliding frame 112 smoothly slides into the corresponding limiting groove.

[0103] like Figure 15 As shown, the tripping limit slot 1017 includes a first tripping limit slot side 1012 and a second tripping limit slot side 1013 arranged at relatively intervals. The closing limit slot 1018 includes a first closing limit slot side 1015 and a second closing limit slot side 1016 arranged at relatively intervals. The two ends of the second tripping limit slot side 1013 and the first closing limit slot side 1015 are respectively connected to the two ends of the transition arc surface 1014. The second tripping limit slot side 1013 and the first closing limit slot side 1015 are symmetrically arranged and distributed in a figure-eight shape. The distance between the ends of the second tripping limit slot side 1013 and the first closing limit slot side 1015 connected to the transition arc surface 1014 is smaller than the distance between the other ends of the second tripping limit slot side 1013 and the first closing limit slot side 1015. Furthermore, the first tripping limit groove side 1012 and the second tripping limit groove side 1013 are symmetrically arranged; the first closing limit groove side 1015 and the second closing limit groove side 1016 are symmetrically arranged.

[0104] like Figure 9 and Figure 13 As shown, the sliding frame base plate 1120 is provided with a sliding frame groove 1124, and the output shaft 111 includes an output shaft driven part. A sliding boss 1112 is provided on the side of the output shaft driven part facing the sliding frame base plate 1120. The width of the sliding frame groove 1124 matches the width of the sliding boss 1112, and the length of the sliding frame groove 1124 is greater than the length of the sliding boss 1112. The sliding frame base plate 1120 is slidably sleeved on the sliding boss 1112 through the sliding frame groove 1124 and slidably disposed on the output shaft driven part. The sliding frame base plate 1120 slides radially along the output shaft 111.

[0105] like Figure 13 As shown, the output shaft 111 also includes an output shaft positioning post 1110; as Figure 12As shown, the side of the rotating frame 1134 facing the output shaft 111 includes a rotating frame positioning hole 1135. The rotating frame positioning hole 1135 is coaxial with the operating shaft 1131. The rotating frame 1134 is rotatably sleeved on the output shaft positioning post 1110 through the rotating frame positioning hole 1135. The output shaft positioning post 1110 cooperates with the rotating frame positioning hole 1135 to ensure that the output shaft 111 and the operating shaft 1131 are coaxial.

[0106] like Figure 14 As shown, the output shaft 111 includes an output shaft driving part and a driving shaft driven part located on both sides. The output shaft driving part and the output shaft driven part rotate coaxially. The output shaft driving part is provided with a driving part connecting groove for driving connection with the rotating contact assembly 21 of each switch unit 2. The output shaft positioning post 1110 is provided on the output shaft driven part.

[0107] like Figure 15 As shown, the housing base 101 is provided with a base assembly groove 1127, a base recess 1128 and a base shaft hole 1129 arranged in sequence. The opening limit groove 1017 and the closing limit groove 1018 are both arranged in the base assembly groove 1127. The sliding frame 112 is slidably arranged in the base assembly groove 1127. The base recess 1128 and the base shaft hole 1129 are coaxially arranged. The output shaft driven part and the output shaft driving part of the output shaft 111 are respectively rotatably arranged in the base recess 1128 and the base shaft hole 1129.

[0108] Preferred, such as Figure 10 As shown, structural reinforcing walls are provided on both sides of the cover plate shaft hole of the disassembly cover plate 1032 along its length. Each reinforcing wall includes an arc-shaped baffle and a supporting wall. The supporting wall is vertically connected to the middle of the arc-shaped baffle, and the two supporting walls of the two reinforcing walls are located on opposite sides of the two arc-shaped baffles. The reinforcing wall is located on the side of the disassembly cover plate 1032 facing the upper cover shaft hole 1031 and is perpendicular to the plane of the disassembly cover plate 1032. The reinforcing wall increases the structural strength of the disassembly cover plate 1032, and its perpendicularity to the plane of the disassembly cover plate 1032 facilitates its installation.

[0109] 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.

[0110] 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 disconnect switch, comprising a stacked operating mechanism unit (1) and at least one switch unit (2), wherein the switch unit (2) comprises a rotary contact assembly, a first stationary contact (22), a second stationary contact (23), and an arc-extinguishing chamber structure disposed inside a switch unit housing, the rotary contact assembly comprising a moving contact having clamping gaps at both ends, the operating mechanism unit (1) comprising an operating mechanism, the output shaft of the operating mechanism being connected to the rotary contact assembly, characterized in that: The switch unit housing includes a second sidewall (242) and a fourth sidewall (244) disposed opposite to each other. The second sidewall (242) has a first notch (2247) for the first stationary contact (22) to extend out, and the fourth sidewall (244) has a third notch (251) for the second stationary contact (23) to extend out. The first stationary contact (22) is located between the second sidewall (242) and the rotary contact assembly, and the second stationary contact (23) is located between the fourth sidewall (244) and the rotary contact assembly. The head (22) includes a screw fixing plate (221) and a first connecting plate (222) connected at right angles. The first connecting plate (222) includes a stationary contact plate (223) extending out of one side of the screw fixing plate (221). The stationary contact plate (223) includes a first stationary contact portion extending outward from the plane of the screw fixing plate (221) for insertion into the clamping gap of the moving contact. The screw fixing plate (221) is provided with screw holes and is placed outside the switch unit housing parallel to the second side wall (242).

2. The rotary disconnector according to claim 1, characterized in that, The second stationary contact (23) includes a second stationary contact portion (231), a second connecting plate (232), and a second terminal block (233) that are connected in sequence by bending at right angles. The second stationary contact portion (231), the second connecting plate (232), and the second terminal block (233) are all located on the same plane. The second stationary contact portion (231) and the second terminal block (233) are located on both sides of the width direction of the second connecting plate (232). The second stationary contact portion (231) is used to insert into the clamping gap of the moving contact. The second terminal block (233) extends from the third notch (251) of the fourth side wall (244) and is perpendicular to the fourth side wall (244).

3. The rotary disconnector according to claim 1, characterized in that, The first stationary contact (22) has a raised, elongated limiting rib (226) at the connection between the first stationary contact portion and the stationary contact plate (223).

4. The rotary disconnector according to claim 1, characterized in that, When the rotary contact assembly is in the closed position, the length direction of the moving contact is perpendicular to the second side wall (242) and the fourth side wall (244). When the rotary contact assembly is in the open position, the length direction of the moving contact is parallel to the second side wall (242) and the fourth side wall (244).

5. The rotary disconnector according to claim 2, characterized in that, The switch unit housing includes an inner mounting structure for mounting the rotary contact assembly (21), the first stationary contact (22), the second stationary contact (23), and the arc-extinguishing chamber structure, and an outer mounting structure located on the back of the inner mounting structure. The operating mechanism unit housing includes the outer mounting structure. The outer mounting structure of the upper switch unit housing or the outer mounting structure of the operating mechanism unit housing is fixedly mounted to the inner mounting structure of the lower switch unit housing to form a space for mounting the rotary contact assembly (21), the first stationary contact (22), the second stationary contact (23), and the arc-extinguishing chamber structure. The switch unit housing and the operating mechanism unit housing include a first limiting structure for limiting the first stationary contact (22) and a second limiting structure for limiting the second stationary contact (23).

6. The rotary disconnector according to claim 5, characterized in that, The first limiting structure includes a first retaining wall (2241), a second retaining wall (2242), a third retaining wall (2243), a first limiting rib (2244), a second limiting rib (2245) located on the inner layer mounting structure, and at least one first supporting rib (2246) located on the bottom surface of the inner layer mounting structure. The first limiting structure also includes at least one second supporting rib (2251) located on the outer layer mounting structure. The first retaining wall (2241) and the second retaining wall (2242) are parallel. The second retaining wall (2242) is perpendicularly connected to the third retaining wall (2243). The third retaining wall (2243) is located between the first retaining wall (2241) and the second retaining wall (2242). The first retaining wall (2241), the second retaining wall (2242), and the third retaining wall (2243) are all perpendicular to the bottom surface of the inner layer mounting structure. The first notch (2247) is formed between the first retaining wall (2241) and the third retaining wall (2243). The second notch (2248) is formed between the second limiting rib (2245) and the second retaining wall (2242). The first retaining wall (2241) and the second retaining wall (2242) limit the two ends of the first connecting plate (222) in the length direction. The third retaining wall (2243) limits the side of the static contact plate (223) away from the first static contact portion. The first limiting rib (2244) and the second limiting rib (2245) limit the side of the first connecting plate (222) away from the screw fixing plate (221). The screw fixing plate (221) extends at least partially out of the first notch (2247) and is connected to the load or power supply. The first static contact portion extends at least partially out of the second notch (2248) and is connected to the moving contact. At least one first supporting rib (2246) limits the first surface of the first connecting plate (222), and at least one second supporting rib (2251) limits the second surface of the first connecting plate (222).

7. The rotary disconnector according to claim 5, characterized in that, The second limiting structure includes a fourth retaining wall (234), a fifth retaining wall (235), a sixth retaining wall (236), and a seventh retaining wall (237) located on the inner layer mounting structure, and at least one third supporting rib (238) located on the bottom surface of the inner layer mounting structure. The second limiting structure also includes at least one fourth supporting rib (239) located on the bottom surface of the outer layer mounting structure. The fourth retaining wall (234) and the fifth retaining wall (235) are parallel to and perpendicular to the bottom surface of the inner layer mounting structure, and the sixth retaining wall (236) and the seventh retaining wall (237) are parallel to and perpendicular to the bottom surface of the inner layer mounting structure. The fourth retaining wall (234) and the seventh retaining wall (237) are perpendicularly connected. The fourth retaining wall (234) and the sixth retaining wall (236) form the third gap (251) at intervals. The fifth retaining wall (235) and the sixth retaining wall (236) are perpendicularly connected. The fifth retaining wall (235) and the seventh retaining wall (237) form the fourth gap (252). The fourth retaining wall (234) and the fifth retaining wall (235) limit the two ends of the second connecting plate (232) in the length direction, the sixth retaining wall (236) and the seventh retaining wall (237) limit the two ends of the second connecting plate (232) in the width direction, at least one third support rib (238) and at least one fourth support rib (239) limit the two sides of the second stationary contact (23) in the width direction, the second terminal block (233) extends out from the third notch (251) and connects to the load or power supply, and the second stationary contact (231) extends out from the fourth notch (252) and connects to the moving contact.

8. The rotary disconnector according to claim 1, characterized in that, The arc-extinguishing chamber structure includes a first arc-extinguishing grid plate group (31) and a second arc-extinguishing grid plate group (32). The switch unit housing has a rectangular structure and also includes a first side wall (241) and a third side wall (243). The first side wall (241), the second side wall (242), the third side wall (243), and the fourth side wall (244) are connected in sequence. The angle between the first side wall (241) and the second side wall (242) forms a first arc-extinguishing chamber for accommodating the first arc-extinguishing grid plate group (31), and the angle between the third side wall (243) and the fourth side wall (244) forms a second arc-extinguishing chamber for accommodating the second arc-extinguishing grid plate group (32). The first arc-extinguishing chamber includes a first grid plate barrier wall (245) and a second grid plate barrier wall (246) that are parallel to the second side wall (242) and spaced apart. The first arc-extinguishing grid plate group (31) is located between the first grid plate barrier wall (245) and the second grid plate barrier wall (246). The second arc-extinguishing chamber includes a third grid plate barrier wall (247) and a fourth grid plate barrier wall (248) that are parallel to the fourth side wall (244) and spaced apart. The second arc-extinguishing grid plate group (32) is located between the third grid plate barrier wall (247) and the fourth grid plate barrier wall (248).

9. The rotary disconnector according to claim 8, characterized in that, The first sidewall (241) has a first vent (2411) at one end of the first arc-extinguishing chamber. The second grid baffle (246) is spaced apart from the first sidewall (241) to form a first airflow gap (2412). A first exhaust channel is formed between the first vent (2411) and the first airflow gap (2412). The third sidewall (243) has a second vent (2431) at one end of the second arc-extinguishing chamber. The fourth grid baffle (248) is spaced apart from the third sidewall (243) to form a second airflow gap. A second exhaust channel is formed between the second vent (2431) and the second airflow gap.

10. The rotary disconnector according to claim 9, characterized in that, The first stationary contact (22) has a first functional space (33) and a second functional space (34) on both sides, and the second stationary contact (23) has a third functional space (35) on one side. The first arc-extinguishing grid plate group (31) is located between the first functional space (33) and the third functional space (35), and the second arc-extinguishing grid plate group (32) is located between the second stationary contact (23) and the second functional space (34).

11. The rotary disconnector according to claim 10, characterized in that, The first functional space (33) is connected to the first air outlet (2411).

12. The rotary disconnector according to claim 5, characterized in that, The first stationary contact (22) has a limiting rib (226) on the side facing the outer mounting structure.

13. The rotary disconnector according to claim 1, characterized in that, The operating mechanism unit (1) further includes an operating mechanism unit housing, which includes a housing cover (103) and a housing base (101). The operating mechanism is mounted on the housing base (101), and the housing cover (103) covers the housing base (101). The operating mechanism includes an operating shaft (1131) rotatably arranged around its own axis, an energy storage mechanism, and an output shaft (111). The housing cover (103) has a cover shaft hole (1031) in the middle, and a disassembly cover plate (1032) is provided inside the cover shaft hole (1031). The disassembly cover plate (1032) is snapped into the cover shaft hole (1031), and the disassembly cover plate (1032) has a central portion for the operating shaft (1131) to pass through. The cover plate has a shaft hole through which the operating shaft (1131) passes to form an operating end for operation. The operating end has a radially protruding limiting protrusion (1033). The cover plate shaft hole includes at least one first clearance notch (1034) for avoiding at least one of the limiting protrusions (1033). The housing cover (103) includes at least one mounting protrusion (1035) for installation corresponding to at least one first clearance notch (1034) and at least one second clearance notch for avoiding at least one of the limiting protrusions (1033). After the cover plate (1032) is removed and fixedly installed in the cover shaft hole (1031) through the operating shaft (1131), the mounting protrusion (1035) is embedded in the first clearance notch (1034).

Images