Driving structure of rotating shaft and moving contact and vacuum molded case circuit breaker

Abstract

The utility model provides a driving structure of a rotating shaft and a moving contact and a vacuum molded case circuit breaker, the rotating shaft comprises at least one rotating shaft bracket which is rotatably arranged, and the rotating shaft bracket comprises a bracket driving part which is connected with an operating mechanism; an elastic piece support and a linkage piece are rotationally installed in the rotating shaft support, at least one elastic piece is connected between the elastic piece support and the rotating shaft support, the linkage piece comprises a first linkage part and a second linkage part which are located on the two sides of the rotating axis of the linkage piece, the first linkage part is hinged to the second connecting rod, and the second connecting rod drives the moving contact to do linear reciprocating motion; the elastic piece acts on the first linkage part through the elastic piece support to drive the linkage piece so that the second linkage part can abut against the rotating shaft support for limiting, the first linkage part drives the moving contact to move linearly through the second connecting rod to make contact with or be separated from the static contact, and the rotating shaft support rotates to drive the moving contact to move linearly. The stability of the circuit breaker during current connection, bearing and breaking can be improved.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to a driving structure for a rotating shaft and moving contacts, and a vacuum molded case circuit breaker. Background Technology

[0002] Most existing circuit breakers use an operating mechanism to drive a rotating shaft. As the shaft rotates, the moving contact on its components rotates as well, making contact with the stationary contact and generating a certain contact pressure. Therefore, the existing operating mechanism and shaft are not suitable for linearly moving contacts. If a circuit breaker were to adopt a linearly moving contact, the rotating shaft would typically need to be removed, and the operating mechanism would require significant modifications, making the operating mechanism non-universal and requiring substantial changes to existing circuit breakers. Utility Model Content

[0003] The purpose of this utility model is to overcome the defects of the prior art and provide a rotating shaft and driving structure for driving the moving contact to move linearly, as well as a vacuum molded case circuit breaker.

[0004] In a first aspect, this application provides a drive structure for a rotating shaft and a moving contact, wherein the rotating shaft includes at least one rotating shaft bracket, the rotating shaft bracket is rotatably disposed and is provided with a bracket drive part connected to an operating mechanism;

[0005] The rotating shaft bracket is rotatably mounted with an elastic element bracket and a linkage element. At least one elastic element is connected between the elastic element bracket and the rotating shaft bracket. The linkage element includes a first linkage part and a second linkage part located on both sides of the rotation axis of the linkage element. The first linkage part is hinged to a second connecting rod and drives the moving contact to reciprocate in a straight line through the second connecting rod. The elastic element acts on the first linkage part through the elastic element bracket, driving the linkage element to make the second linkage part abut against and limit the rotating shaft bracket. When the rotating shaft bracket rotates from the second position to the first position, the rotating shaft bracket pushes the first linkage part through the elastic element and the elastic element bracket. The first linkage part drives the moving contact to move linearly and contact the stationary contact through the second connecting rod. When the rotating shaft bracket rotates clockwise from the first position to the second position, the rotating shaft bracket pushes the second linkage part, causing the first linkage part to drive the moving contact to move linearly and separate from the stationary contact through the second connecting rod.

[0006] In one possible implementation, the pivot bracket includes a third side plate, a fourth side plate, and a rear side plate connecting the third side plate and the fourth side plate, wherein the linkage and the elastic element bracket are rotatably mounted between the third side plate and the fourth side plate, and the elastic element is connected between the rear side plate and the elastic element bracket.

[0007] In one possible implementation, a first limiting portion is formed at the bottom of the rear side plate, and the first limiting portion cooperates with or separates from the second linkage portion.

[0008] In one possible implementation, the line connecting the first linkage part to the rotation axis forms an obtuse angle with the line connecting the second linkage part to the rotation axis, and the second linkage part extends below the first limiting part.

[0009] In one possible implementation, the rotation axis of the linkage coincides with the rotation axis of the shaft support.

[0010] In one possible implementation, the linkage includes a first side plate and a second side plate that are opposite and parallel to each other, and a structural reinforcement plate connecting the first side plate and the second side plate. Two parallel first rotating rods and second rotating rods are connected between the first side plate and the second side plate. The first rotating rods abut against the elastic element bracket, and the linkage is installed in the contact support via the second rotating rods.

[0011] In one possible implementation, the elastic element bracket includes an elastic element bracket mounting part, an elastic element mounting part, and an elastic element bracket linkage part connected in sequence. The elastic element bracket mounting part is rotatably connected to the rotating shaft bracket, the elastic element mounting part is connected to the elastic element, and the elastic element bracket linkage part extends between the first side plate and the second side plate of the linkage part and abuts against the first rotating rod.

[0012] In one possible implementation, the first side plate and the second side plate protrude to form two protrusions, and the two ends of the first rotating rod are mounted on the two protrusions; the elastic element mounting part is bent and connected to the elastic element bracket linkage part.

[0013] In one possible implementation, the two ends of the second rotating rod extend out of the first and second side plates of the linkage to form a second rotating rod mounting part. The two sides of the rotating shaft bracket include a third side plate, a fourth side plate, and a rear side plate connecting the third side plate and the fourth side plate. The third side plate and the fourth side plate are provided with linkage mounting grooves, and the second rotating rod mounting part is installed in the linkage mounting grooves.

[0014] In one possible implementation, the linkage mounting groove includes a first outer sliding groove, a first inner sliding groove, and a first limiting groove. The first outer sliding groove and the first inner sliding groove extend towards the rear side plate to the first limiting groove. An annular gasket is also fitted on the second rotating rod mounting part. The thickness of the annular gasket is less than the length of the second rotating rod mounting part, so that the second rotating rod mounting part forms a protrusion relative to the annular gasket. The annular gasket is placed in the first outer sliding groove, and the protrusion is placed in the first inner sliding groove. The linkage is slid along the first outer sliding groove and the first inner sliding groove towards the rear side plate to the first limiting groove. The annular gasket is placed in the first limiting groove, and the annular gasket is driven to slide along the second rotating rod mounting part away from the linkage. The second rotating rod mounting part also has a second annular slot. After the annular gasket slides to the bottom of the first limiting groove, the second annular slot is located between the annular gasket and the linkage. A second card is inserted into the second annular slot to limit the axial movement of the second rotating rod.

[0015] In one possible implementation, when the rotating shaft support is in the first position of the closed state, there is a force-relieving gap between the first limiting part and the second linkage part; during the rotation of the rotating shaft support from the first position to the second position of the open state, and when the contact support is in the second position, the first limiting part and the second linkage part abut against each other.

[0016] In one possible implementation, a moving contact support and an insulating bracket are also included, the moving contact support being connected between the moving contact and the second link, the moving contact support sliding linearly within the insulating bracket.

[0017] In one possible implementation, a repulsion mechanism and a locking mechanism are also included. The repulsion mechanism is connected to the moving contact support. When a short-circuit current passes through the repulsion mechanism, the repulsion mechanism drives the moving contact support, which in turn drives the moving contact to move in a straight line away from the stationary contact, thereby locking the repulsion mechanism with the locking mechanism.

[0018] In one possible implementation, the repulsion mechanism includes a moving connecting plate and a stationary connecting plate that are spaced apart and arranged in parallel. The moving connecting plate and the stationary connecting plate are electrically connected by a flexible conductor. One end of the moving contact support is insulated and passes through the stationary connecting plate and is connected to one side of the moving connecting plate. The other side of the moving connecting plate is connected to the second link and locks with the repulsion mechanism.

[0019] Secondly, this application provides a vacuum molded case circuit breaker, including a vacuum interrupter, and also includes the aforementioned drive structure for the rotating shaft and moving contact. At least the contact portion of the moving contact and the stationary contact is located inside the vacuum interrupter. It also includes a moving contact support member, the moving contact support member extending into the vacuum interrupter and connected to the moving contact. A second connecting rod is connected between the moving contact support member and the first linkage part of the linkage member.

[0020] Compared to existing technologies, the driving structure of the rotating shaft and moving contact of this utility model includes at least one rotating shaft support. The rotating shaft support is rotatably disposed within the circuit breaker. An elastic element support and a linkage element are rotatably disposed within the rotating shaft support. At least one elastic element is disposed between the rotating shaft support and the elastic element support. The two sides of the rotating shaft of the linkage element are respectively a first linkage part and a second linkage part. The first linkage part is both linked with the moving contact and abuts against the side of the elastic element support facing away from the elastic element. The second linkage part abuts against the rotating shaft support. The rotating shaft support drives the first linkage part through the elastic element and the elastic element support to drive the moving contact to move linearly for closing operation. The rotating shaft support drives the second linkage part for opening operation. When the circuit breaker is closed, the elastic element can play a buffering role. At the same time, the elastic element can also increase the contact pressure between the moving contact and the stationary contact, and improve the stability of the electrical connection between the moving contact and the stationary contact. By rotating the rotating shaft support to drive the moving contact to move linearly, the stability of the circuit breaker when connecting, carrying, and breaking current can be improved. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the rotating shaft of this utility model;

[0022] Figure 2 This is an exploded view of the rotating shaft of this utility model;

[0023] Figure 3 This is a structural schematic diagram of the rotating shaft disassembly elastic component bracket of this utility model;

[0024] Figure 4a and Figure 4b This is a schematic diagram of the structure of the elastic element bracket and the shaft bracket in the rotating shaft of this utility model, which are installed through a third rotating rod;

[0025] Figure 5 This is a cross-sectional view of the rotating shaft of this utility model.

[0026] Figure 6 This is a schematic diagram of the structure of the upper lead wire, vacuum interrupter, stationary contact, moving contact, moving contact support, insulating bracket, repulsion mechanism, locking mechanism, rotating shaft and lower lead wire after installation.

[0027] Figure 7 This is a schematic diagram of the structure of the vacuum molded case circuit breaker of this utility model in the tripped state;

[0028] Figure 8 This is a schematic diagram of the vacuum molded case circuit breaker of this utility model in the closed state;

[0029] Figure 9 This is a schematic diagram of the internal structure of the vacuum molded case circuit breaker of this utility model;

[0030] Figure 10 This is an exploded view of the internal structure of the vacuum molded case circuit breaker of this utility model;

[0031] The reference numerals in the attached drawings include: operating mechanism 100; handle mechanism 101; moving contact 11; stationary contact 12; vacuum interrupter 104; rotating shaft support 1; first hole 02; first connecting rod 01; elastic element support 2; elastic element 3; linkage element 4; rotating shaft 43; first linkage part 41; second linkage part 42; first linkage hole 44; first rotating rod 45; second rotating rod 46; first side plate 471; second side plate 472; structural reinforcement plate 473; second connecting rod 51; first mounting shaft 52; first through hole 53; first annular groove 521; first limiting part 13; elastic element support mounting part 21; elastic element mounting part 22. Elastic component bracket linkage part 23; third rotating rod 24; third side plate 14; fourth side plate 15; rear side plate 161; linkage component mounting groove 17; first outer sliding groove 174; first inner sliding groove 175; first limiting groove 176; annular gasket 181; second annular slot 182; second card 183; rotating shaft protrusion 191; bearing 192; unloading clearance 48; moving contact support 16; insulating bracket 171; repulsion mechanism 106; locking mechanism 107; moving connecting plate 172; stationary connecting plate 173; first locking component 1071; second locking component 1072; first protrusion 1073; upper lead wire 105; lower lead wire 108. Detailed Implementation

[0032] 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.

[0033] like Figures 1-10As shown, the circuit breaker includes a housing, an operating mechanism 100, a handle mechanism 101, and at least one phase pole unit disposed within the housing. Each phase pole unit includes a moving contact 11, a stationary contact 12, an arc-extinguishing mechanism, and a protection mechanism. The moving contact 11 is linked to a rotating shaft. The rotating shaft includes at least one rotating shaft support 1 corresponding to at least one phase pole unit. The rotating shaft supports 1 of each phase pole unit are integral or fixedly connected. The operating mechanism 100 is connected to the rotating shaft, and the handle mechanism 101 is connected to the operating mechanism 100 for manually operating the circuit breaker to open and close. The handle mechanism 101 drives the operating mechanism 100 to rotate the rotating shaft, thereby causing the moving contact 11 to contact or disconnect from the stationary contact 12. The arc-extinguishing mechanism is used to extinguish the arc between the moving contact 11 and the stationary contact 12. When a fault exists in the circuit of the corresponding phase unit, the protection mechanism triggers the operating mechanism 100 to trip, causing the operating mechanism 100 to disconnect the moving contact 11 from the stationary contact 12. The protection mechanism includes an overload protection mechanism and / or a short-circuit protection mechanism. The overload protection mechanism is typically a bimetallic strip for overload protection, and the short-circuit protection mechanism is an electromagnetic trip unit for short-circuit protection. In a preferred embodiment of this application, the protection mechanism is a thermomagnetic trip unit integrating overload and short-circuit protection. This is prior art in the field.

[0034] The circuit breaker in this embodiment is a vacuum molded case circuit breaker, and its arc-extinguishing mechanism includes a vacuum interrupting chamber 104. At least the contact surfaces of the moving contact 11 and the stationary contact 12 are located inside the vacuum interrupting chamber 104. The vacuum environment of the vacuum interrupting chamber 104 provides a better arc-extinguishing effect. The moving contact 11 is linearly movable and contacts or separates from the stationary contact 12.

[0035] like Figures 1-10 As shown, the circuit breaker of this application includes a rotating shaft, and an operating mechanism 100 is connected to the rotating shaft to drive the rotating shaft to rotate. The rotating shaft is connected to the moving contact 11. The rotation of the rotating shaft drives the moving contact 11 to move in a straight line to realize the closing and opening of the circuit breaker.

[0036] like Figure 1-5 As shown, the rotating shaft includes at least one rotating shaft support 1. In this embodiment, the rotating shaft includes three rotating shaft supports 1. Each rotating shaft support 1 is provided with a support drive part connected to the operating mechanism 100. In this embodiment, as shown... Figure 10As shown, the support drive part is the first hole 02. The operating mechanism 100 is hinged to the first hole 02 through the first connecting rod 01, driving the rotating shaft support 1 to rotate. An elastic element support 2 and at least one elastic element 3 are installed in the rotating shaft support 1. The rotating shaft support 1 is rotatably disposed in the circuit breaker. The elastic element support 2 is rotatably mounted on the rotating shaft support 1. At least one elastic element 3 is connected between the elastic element support 2 and the rotating shaft support 1. The rotating shaft also includes a linkage 4 rotatably mounted on the rotating shaft support 1. The linkage 4 includes a first linkage part 41 and a second linkage part 42 located on both sides of the rotation axis 43 of the linkage 4. The first linkage part 41 is linked with the moving contact 11 and the elastic element support 2. In this embodiment, the first linkage part 41 abuts against the side of the elastic element support 2 that is away from the elastic element 3. The elastic element 3 drives the linkage 4 through the elastic element support 2 acting on the first linkage part 41, causing the second linkage part 42 to abut against and limit the rotating shaft support 1.

[0037] Furthermore, a second link 51 connects the moving contact 11 and the linkage 4, enabling the moving contact 11 and the linkage 4 to move together. The first linkage 41 is hinged to the second link 51, driving the moving contact 11 to reciprocate linearly via the second link 51. The operating mechanism 100 can drive the rotating shaft support 1 to rotate between a first position and a second position. When closing, the operating mechanism 100 drives the rotating shaft support 1 to rotate from the second position to the first position; when opening and / or tripping, the operating mechanism 100 drives the rotating shaft support 1 to rotate from the first position to the second position. (Reference) Figure 8 When the circuit is closed, the rotating shaft support 1 rotates counterclockwise from the second position to the first position. The rotating shaft support 1, through the elastic element 3 and the elastic element support 2, pushes the first linkage part 41. The first linkage part 41, through the second connecting rod 51, drives the moving contact 11 to move linearly and contact the stationary contact 12. After the moving contact 11 contacts the stationary contact 12, the rotating shaft support 1 continues to rotate, compressing the elastic element 3. This causes the elastic element 3 to push the first linkage part 41 to press the moving contact 11 and the stationary contact 12 together. The second linkage part 42 then separates from the rotating shaft support 1. At this time, the rotating shaft support 1 is in the first position. (See also...) Figure 7 When the circuit breaker is opened, the rotating shaft support 1 rotates clockwise from the first position to the second position. The rotating shaft support 1 abuts against the second linkage part 42. The rotating shaft support 1 pushes the second linkage part 42, causing the first linkage part 41 to drive the moving contact 11 to move linearly and separate from the stationary contact 12 through the second connecting rod 51. The rotating shaft support 1 is then in the second position.

[0038] Compared to existing technologies, the rotating shaft of the circuit breaker of this utility model includes at least one rotating shaft support 1. The rotating shaft support 1 is rotatably disposed within the circuit breaker. An elastic element support 2 and a linkage 4 are rotatably disposed within the rotating shaft support 1. At least one elastic element 3 is disposed between the rotating shaft support 1 and the elastic element support 2. The two sides of the rotating shaft center 43 of the linkage 4 are respectively a first linkage part 41 and a second linkage part 42. The elastic element 3 drives the linkage 4 through the elastic element support 2 acting on the first linkage part 41, causing the second linkage part 42 to abut and limit its movement against the rotating shaft support 1. The rotating shaft support 1... The first linkage 41 driven by the elastic element 3 and the elastic element bracket 2 drives the moving contact 11 to move linearly for closing operation, and the rotating shaft bracket 1 drives the second linkage 42 for opening operation. When the circuit breaker is closed, the elastic element 3 can play a buffering role. At the same time, the elastic element 3 can also increase the contact pressure between the moving contact 11 and the stationary contact 12, and improve the stability of the electrical connection between the moving contact 11 and the stationary contact 12. By rotating the rotating shaft bracket 1 to drive the moving contact 11 to move linearly, the stability of the circuit breaker when connecting, carrying and breaking current can be improved.

[0039] Preferred, such as Figure 4a and Figure 5 As shown, the pivot bracket 1 in this embodiment includes a third side plate 14, a fourth side plate 15, and a rear side plate 161 connecting the third side plate 14 and the fourth side plate 15, which are opposite and parallel to each other. The linkage 4 and the elastic element bracket 2 are rotatably installed between the third side plate 14 and the fourth side plate 15. The elastic element 3 is connected between the rear side plate 161 and the elastic element bracket 2. In this embodiment, the elastic element bracket 2 is provided with a mounting protrusion, and the rear side plate 161 is provided with a mounting groove. The two ends of the elastic element 3 are respectively connected to the mounting protrusion and the mounting groove. The elastic element 3 can be, but is not limited to, a compression spring, a torsion spring, a spring, or a tension spring. In this embodiment, the elastic element 3 is preferably a compression spring.

[0040] Preferred, such as Figure 5 As shown, a first limiting part 13 is provided inside the rotating shaft bracket 1, and the second linkage part 42 of the linkage member 4 is separated from or abuts against the first limiting part 13. Specifically, the first limiting part 13 is formed on the lower side of the rear side plate 161.

[0041] Preferred, such as Figures 1-4aAs shown, the linkage 4 includes a first side plate 471 and a second side plate 472 that are opposite and parallel to each other, and a structural reinforcing plate 473 connecting the first side plate 471 and the second side plate 472. Two parallel first rotating rods 45 and second rotating rods 46 are connected between the first side plate 471 and the second side plate 472. The first rotating rods 45 abut against the elastic element bracket 2. The linkage 4 is installed in the contact support through the second rotating rods 46. Specifically, the first side plate 471 and the second side plate 472 are respectively formed by two first linkage holes 44, two first rotating rod holes, and two second rotating rod holes through each other in opposite directions. The first rotating rods 45 are installed in the first rotating rod holes, and the second rotating rods 46 are installed in the second rotating rod holes.

[0042] Furthermore, such as Figure 2 and Figure 5 As shown, the first linkage part 41 of the linkage member 4 includes a first linkage hole 44 located at the end. The linkage member 4 is hinged to the second connecting rod 51 through the first linkage hole 44. The first rotating rod 45 is located between the first linkage hole 44 and the second rotating rod 46. The first rotating rod 45 abuts against the elastic member bracket 2. The second rotating rod 46 is mounted on the rotating shaft bracket 1. The linkage member 4 rotates around the second rotating rod 46 with the second rotating rod 46 as the rotation axis 43.

[0043] Furthermore, such as Figure 5 As shown, in the preferred embodiment, the first linkage part 41 has two protrusions on both sides, forming two protrusions. The two ends of the first rotating rod 45 are mounted on the protrusions. By providing protrusions on the first linkage part 41, the first rotating rod 45 can be mounted on the protrusions, which can ensure that the first rotating rod 45 and the elastic member bracket 2 are subjected to more force when they abut against each other, and the first linkage part 41 of the linkage member 4 has a better force direction.

[0044] Preferably, the rotation axis 43 of the linkage 4 coincides with the rotation axis of the rotating shaft bracket 1.

[0045] Preferred, such as Figure 5 As shown, the line connecting the first linkage part 41 to the rotation axis 43 forms an obtuse angle with the line connecting the second linkage part 42 to the rotation axis 43, and the second linkage part 42 extends below the first limiting part 13.

[0046] Furthermore, in other feasible embodiments, the linkage 4 can also be straight or curved.

[0047] Preferred, such as Figure 2 and Figure 3As shown, the linkage 4 is rotatably mounted on the rotating shaft bracket 1 via the second rotating rod 46. Specifically, both ends of the second rotating rod 46 extend out of the first side plate 471 and the second side plate 472 of the linkage 4, forming a second rotating rod mounting part. The third side plate 14 and the fourth side plate 15 on both sides of the rotating shaft bracket 1 are provided with linkage mounting grooves 17 or linkage mounting holes. In this embodiment, the linkage mounting grooves 17 are preferred, and the second rotating rod mounting parts on both sides of the linkage 4 are installed in the linkage mounting grooves 17 on the rotating shaft bracket 1.

[0048] Furthermore, such as Figure 2 , Figure 3 and Figure 4b As shown, the linkage mounting groove 17 includes a first outer sliding groove 174, a first inner sliding groove 175, and a first limiting groove 176 connecting the first outer sliding groove 174 and the first inner sliding groove 175. The first outer sliding groove 174 and the first inner sliding groove 175 extend to the first limiting groove 176 on the rear side plate 161. An annular gasket 181 is also sleeved on the second rotating rod mounting part. The thickness of the annular gasket 181 is less than the length of the second rotating rod mounting part. The annular gasket 181 is installed on the second rotating rod mounting part near the first side plate 471 or the second side plate 472 so that the second rotating rod mounting part forms a protrusion relative to the annular gasket 181. When the linkage 4 is installed on the rotating shaft bracket 1, the annular gasket 181 is placed in the first outer sliding groove 174, and the protrusion of the second rotating rod mounting part is placed in the first inner sliding groove 175. The linkage 4 is slid along the first outer sliding groove 174 and the first inner sliding groove 175 towards the rear side plate 161 to the first limiting groove 176. The annular gasket 181 is placed in the first limiting groove 176, and the annular gasket 181 is driven to slide along the second rotating rod mounting part away from the linkage 4. Preferably, the two annular gaskets 181 slide to the bottom of the first limiting groove 176 and are in close contact with the third side plate 14 or the fourth side plate 15. The limiting cooperation between the annular gasket 181 and the first limiting groove 176 can limit the second rotating rod mounting part from sliding out of the linkage mounting groove 17. The first outer sliding groove 174 and the first inner sliding groove 175 are used to make way.

[0049] Furthermore, such as Figure 2 As shown, the second rotating rod mounting part is also provided with a second annular groove 182. After the annular pad 181 slides to the bottom of the first limiting groove 176, the second annular groove 182 is located between the annular pad 181 and the linkage 4. The second card 183 is inserted into the second annular groove 182, which can limit the second rotating rod 46 to move axially.

[0050] Preferred, such as Figures 1-6As shown, the second connecting rod 51 includes a first connecting end and a second connecting end. The first connecting end is hinged to the first linkage part 41, and the second connecting end is hinged to the moving contact 11. Specifically, the first connecting end of the second connecting rod 51 is provided with a first connecting rod hole, and the second connecting end is provided with a second connecting rod hole. The first connecting rod hole corresponds to the first linkage hole 44 on the linkage member 4, and the first mounting shaft 52 passes through the first connecting rod hole and the first linkage hole 44 for installation and fixation. Of course, this application is not limited to achieving hinged connection through the first mounting shaft 52.

[0051] Furthermore, such as Figure 6 As shown, in order to facilitate the installation of the second connecting rod 51 and the linkage 4, first through holes 53 are provided on both sides of the rotating shaft bracket 1. The first mounting shaft 52 passes through the first through hole 53 into the first connecting rod hole and the first linkage hole 44. It should be noted that the first mounting shaft 52 is not installed on the rotating shaft bracket 1, but only passes through the first through hole 53. That is, the connection part of the second connecting rod 51 and the linkage 4 can move within the rotating shaft bracket 1.

[0052] Furthermore, in a preferred embodiment, the first mounting shaft 52 has first annular slots 521 at both ends. After the second connecting rod 51 and the linkage 4 are installed, the second connecting rod 51 and the linkage 4 are clamped and limited by the first card in the first annular slots 521, preventing the first mounting shaft 52 from moving axially and causing the second connecting rod 51 and the linkage 4 to disintegrate.

[0053] Preferred, such as Figures 1-5 As shown, the elastic element bracket 2 has a plate-like structure and is hinged to the rotating shaft bracket 1. The elastic element bracket 2 includes an elastic element bracket mounting part 21, an elastic element mounting part 22, and an elastic element bracket linkage part 23 connected in sequence. The elastic element bracket mounting part 21 is rotatably connected to the rotating shaft bracket 1, the elastic element mounting part 22 is connected to the elastic element 3, and the elastic element bracket linkage part 23 is connected to the first linkage part 41 of the linkage part 4. Specifically, the elastic element bracket mounting part 21 includes two annular extensions on both sides, each including an elastic element bracket mounting hole. The rotating shaft bracket 1 includes two opposing second mounting holes on both sides. A third rotating rod 24 passes through the elastic element bracket mounting holes and the second mounting holes, limiting the elastic element bracket 2 within the rotating shaft bracket 1, allowing the elastic element bracket 2 to rotate around the third rotating rod 24. The elastic element bracket linkage part 23 extends between the first side plate 471 and the second side plate 472 of the linkage part 4 and abuts against the first rotating rod 45.

[0054] Furthermore, such as Figure 5As shown, the elastic element mounting part 22 is bent and connected to the elastic element bracket linkage part 23, preferably with an obtuse angle. Specifically, the elastic element bracket linkage part 23 bends towards the elastic element 3, and the side facing away from the elastic element 3 abuts against the first rotating rod 45 of the linkage part 4.

[0055] Preferred, such as Figure 2 As shown in this embodiment, the rotating shaft includes three rotating shaft supports 1 arranged side by side and spaced apart. Each rotating shaft support 1 corresponds to a phase pole unit, and two elastic elements 3 are disposed inside the rotating shaft support 1. Preferably, the multiple rotating shaft supports 1 of the rotating shaft are integrally formed. Among the multiple rotating shaft supports 1 of the rotating shaft, the third side plate 14 or the fourth side plate 15 of the two rotating shaft supports 1 located on both sides extend outward to form a rotating shaft protrusion 191. The rotating shaft protrusion 191 is located at the rotation axis 43 of the rotating shaft support 1. The rotating shaft protrusion 191 is used for rotatable installation in the circuit breaker. In a preferred embodiment, a bearing 192 is sleeved on the rotating shaft protrusion 191, which can reduce the resistance to rotation of the rotating shaft support 1 and make the rotation of the rotating shaft support 1 smoother and more fluid.

[0056] Preferably, in another embodiment, the rotating shaft includes a rotating shaft support 1. The third side plate 14 and the fourth side plate 15 of the rotating shaft support 1 extend outwards to form two rotating shaft protrusions 191. The rotating shaft protrusions 191 are located at the rotation axis 43 of the rotating shaft support 1. The rotating shaft protrusions 191 are used for rotatably mounting inside the circuit breaker. In a preferred embodiment, a bearing 192 is sleeved on the rotating shaft protrusions 191, which can reduce the resistance to the rotation of the rotating shaft support 1 and make the rotation of the rotating shaft support 1 smoother and more fluid.

[0057] Preferred, such as Figure 7 and Figure 8 As shown, the circuit breaker includes a drive mechanism, and an operating mechanism 100 is connected to the drive mechanism. The operating mechanism 100 controls the rotation of the rotating shaft support 1, which in turn drives the moving contact 11 to reciprocate along a linear path, thus opening and closing the circuit breaker and the stationary contact 12. The drive mechanism is a handle mechanism 101 and / or a remote control component. The operating mechanism 100 is connected to the handle mechanism 101 to achieve manual opening and closing, and / or, the operating mechanism 100 is connected to the remote control component to remotely control the circuit breaker to automatically open and close.

[0058] Preferred, such as Figure 8As shown, in this embodiment, when the rotating shaft support 1 is in the first position of the closed state, the elastic element 3 drives the elastic element support 2, the elastic element support 2 drives the linkage 4, and the linkage 4 drives the moving contact 11. After the moving contact 11 and the stationary contact 12 abut against each other, the moving contact 11 still has the energy to move towards the stationary contact 12, which can increase the contact pressure between the moving contact 11 and the stationary contact 12 and enhance the stability and reliability of the electrical connection of the circuit breaker in the closed state. In this embodiment, the elastic element 3 is compressed.

[0059] In particular, such as Figure 8 As shown, in the preferred embodiment of this application, a force-relieving gap 48 exists between the second linkage part 42 of the linkage member 4 and the first limiting part 13 of the rotating shaft bracket 1. After the moving contact 11 and the stationary contact 12 abut against each other, the moving contact 11 moves a certain distance in the opposite direction due to the reaction force of the stationary contact 12 and then stops moving. The moving contact 11 drives the linkage member 4 to rotate clockwise around the second rotating rod 46 by a certain angle through the second connecting rod 51, so that the force-relieving gap 48 is formed between the linkage member 4 and the rotating shaft bracket 1, which is used to enhance the elastic energy release of the elastic member 3, thereby enhancing the contact pressure between the moving contact 11 and the stationary contact 12, and enhancing the stability and reliability of the electrical connection when the circuit breaker is closed. Figure 7 This is a cross-sectional view of the vacuum molded case circuit breaker of this application in the tripped state. Figure 8 This is a cross-sectional view of the vacuum molded case circuit breaker of this application in the closed state.

[0060] Specifically, such as Figure 7 and Figure 8 As shown in the embodiment of this application, the operation process of the rotating shaft is as follows:

[0061] When the circuit breaker rotates from closed to open, the drive operating mechanism 100 drives the rotating shaft support 1 to rotate from the first position to the second position. In this embodiment, the rotation is clockwise. The elastic element 3 drives the elastic element support 2 to rotate clockwise around the third rotating rod 24. Due to the existence of the unloading gap 48, the elastic element support 2 drives the linkage 4 to rotate counterclockwise around the second rotating rod 46. The elastic element support 2 and the linkage 4 rotate synchronously in opposite directions. The rotating shaft support 1 and the linkage 4 rotate synchronously in opposite directions. After rotating a certain angle, the first limiting part 13 of the rear side plate 161 abuts against the second linkage part 42 of the linkage 4, and the elastic energy release of the elastic element 3 decreases. In this embodiment, Figure 7 and Figure 8 This can be manifested in the length of the compression spring becoming longer; the rotating shaft bracket 1 continues to rotate, driving the linkage 4 to rotate clockwise around the second rotating rod 46, so that the linkage 4 and the rotating shaft bracket 1 are linked. The linkage 4 drives the moving contact 11 to move in a straight line away from the stationary contact 12 through the second connecting rod 51, so that the circuit breaker is tripped. The rotating shaft bracket 1 stops rotating after rotating to the second position.

[0062] When the circuit breaker rotates from open to closed, the drive operating mechanism 100 drives the rotating shaft support 1 to rotate from the second position to the first position. In this embodiment, the rotation is counterclockwise. The moving contact 11 moves along a straight line towards the stationary contact 12 until the moving contact 11 contacts the stationary contact 12. The rotating shaft support 1 continues to rotate. Under the reaction force of the stationary contact 12, the moving contact 11 drives the linkage 4 to rotate clockwise around the second rotating rod 46 via the second connecting rod 51. The linkage 4 drives the elastic element support 2 to rotate counterclockwise around the third rotating rod 24, compressing the elastic element 3 and increasing the elastic release energy of the elastic element 3. In this embodiment, Figure 7 and Figure 8 This can be manifested in the shortening of the compression spring; the second linkage part 42 of the linkage 4 separates from the first limiting part 13 of the rotating shaft bracket 1, and after the rotating shaft bracket 1 rotates to the first position, the unloading gap 48 is formed between the rotating shaft bracket 1 and the linkage 4, and the circuit breaker completes the closing. The process of the rotating component switching from the closed state to the tripped state is similar to the process of the rotating component switching from the closed state to the open state, and will not be described in detail here.

[0063] Preferred, such as Figure 7 and Figure 8 As shown, to facilitate the linkage between the moving contact 11 and the linkage 4 of the rotating shaft, a moving contact support 16 is also connected between the moving contact 11 and the linkage 4 of the rotating shaft. One end of the moving contact support 16 is fixedly installed with the moving contact 11, and the other end can be connected to the second connecting rod 51. In this embodiment, the circuit breaker is a vacuum molded case circuit breaker, including a vacuum interrupter 104. At least the contact portion of the moving contact 11 and the stationary contact 12 is located inside the vacuum interrupter 104 of the vacuum molded case circuit breaker. The moving contact support 16 extends into the vacuum interrupter 104 and is connected to the moving contact 11. It moves linearly within the vacuum interrupter 104, driving the moving contact 11 to reciprocate linearly. Since the vacuum environment contains almost no conductive particles, the arc generated between the moving contact 11 and the stationary contact 12 can be quickly extinguished when the circuit breaker is opening or closing, ensuring the high reliability and long life of the vacuum molded case circuit breaker. The vacuum interrupter 104 can improve the arc extinguishing capability between the moving contact 11 and the stationary contact 12, thereby making the circuit breaker suitable for higher voltage operating environments.

[0064] Furthermore, such as Figure 7 and Figure 8 As shown, the vacuum molded case circuit breaker also includes an insulating bracket 171. The moving contact support 16 passes through the insulating bracket 171 and slides linearly within it. The insulating bracket 171 can be made of plastic, serving both as insulation and as a support and fixation for the moving contact support 16.

[0065] Furthermore, the insulating bracket 171 includes a third through hole through which the moving contact support 16 passes. At least one strip-shaped rib is provided on the inner wall of the third through hole along the sliding direction of the moving contact support 16. At least one strip-shaped groove is provided on the outer wall of the moving contact support 16. At least one strip-shaped protrusion is installed in at least one strip-shaped groove. During the sliding of the moving contact support 16 in the horizontal direction, the moving contact support 16 is limited to rotate around its own axis to prevent the rotation of the moving contact support 16 from reducing the airtightness of the vacuum interrupter 104, thereby affecting the service life of the vacuum molded case circuit breaker.

[0066] Preferred, such as Figures 6-8 As shown, the vacuum molded case circuit breaker also includes a repulsion locking device, which includes a repulsion mechanism 106 and a locking mechanism 107. The repulsion mechanism 106 is connected to the moving contact support 16, and the locking mechanism 107 is fixedly installed. When a sudden large current occurs during a load short circuit, the short-circuit current passes through the repulsion mechanism 106, and the first electric repulsion force generated by the repulsion mechanism 106 suddenly increases, thereby driving the moving contact support 16 to move rapidly, causing the moving contact 11 and the stationary contact 12 to separate quickly, so that the moving contact 11 moves away from the stationary contact 12, and the locking mechanism 107 locks the repulsion mechanism 106. This enables rapid tripping to protect the circuit. Moreover, the locking mechanism 107 is used to lock the repulsed repulsion mechanism 106 to prevent the vacuum molded case circuit breaker from closing again.

[0067] Furthermore, when the moving contact 11 and the stationary contact 12 break, a second electrodynamic repulsive force, namely the Holm force, exists between them. This second electrodynamic repulsive force helps the moving contact 11 and the stationary contact 12 separate quickly. Specifically, when the moving contact 11 and the stationary contact 12 break, the current between them generates a magnetic field, which in turn exerts a reverse force on the current, namely the Holm force. When the circuit is short-circuited, the current increases dramatically, and the Holm force suddenly increases, which helps to accelerate the separation of the moving contact 11 and the stationary contact 12. In this embodiment, since the moving contact 11 and the stationary contact 12 are located inside the vacuum interrupter 104, the vacuum interrupter 104 can enhance the effect of the Holm force, further increasing the speed at which the moving contact 11 and the stationary contact 12 separate.

[0068] Specifically, such as Figures 6-8As shown, the repulsion mechanism 106 includes a movable connecting plate 172 and a stationary connecting plate 173 arranged parallel to each other and spaced apart. A flexible conductor connects the movable connecting plate 172 and the stationary connecting plate 173. The flexible conductor can be made of copper braided wire or a conductive flexible part. The movable connecting plate 172 is fixedly connected to and electrically connected to the movable contact support 16. The rotating shaft drives the movable contact 11, the movable contact support 16, and the movable connecting plate 172 to reciprocate synchronously in the horizontal direction. Figure 6 The diagram shows the structure of the present invention after the upper lead 105, vacuum interrupter 104, stationary contact 12, moving contact 11, moving contact support 16, insulating bracket 171, repulsion mechanism 106, locking mechanism 107, rotating shaft and lower lead 108 are installed.

[0069] Furthermore, the moving contact support 16 is insulated through the stationary connecting plate 173 and connected to the moving connecting plate 172. One end of the second connecting rod 51 is connected to the side of the moving connecting plate 172 facing away from the moving contact support 16, and the other end is connected to the linkage member 4 of the rotating shaft. The second connecting rod 51 is hinged to the moving connecting plate 172. The end of the stationary connecting plate 173 away from the bent extension is connected to the lower lead wire 108. Specifically, the stationary connecting plate 173 is located on the side of the moving connecting plate 172 near the moving contact 11. The stationary connecting plate 173 includes a second through hole. The moving contact support 16 has a cylindrical structure, passes through the second through hole, and is insulated from the stationary connecting plate 173.

[0070] Furthermore, the stationary contact 12 is connected to the upper lead 105.

[0071] Preferably, the insulating bracket 171 includes an annular protrusion, through which the moving contact support 16 passes and connects to the moving connecting plate 172. One side of the insulating bracket 171 is connected to the vacuum interrupter 104, and the other side is connected to the stationary connecting plate 173. The annular protrusion extends out of the second through hole in the stationary connecting plate 173, serving as insulation between the moving contact support 16 and the stationary connecting plate 173.

[0072] Furthermore, the locking mechanism 107 includes a first locking member 1071 and a second locking member 1072 that cooperate for locking. The second locking member 1072, the moving connecting plate 172, and the moving contact support member 16 are fixedly connected. In this embodiment, the second locking member 1072, the moving connecting plate 172, and the moving contact support member 16 can be fixedly installed by screws.

[0073] Furthermore, such as Figure 7 and Figure 8As shown, the first locking member 1071 includes a rotatably mounted hook and an elastic member for driving the hook to rotate and locking in conjunction with the second locking member 1072. The second locking member 1072 may include a hanging hole or hanging groove that locks in conjunction with the hook.

[0074] Specifically, such as Figure 7 and Figure 8 As shown, the first locking member 1071 is disposed above the rotating shaft bracket 1. The elastic element drives the hook to rotate clockwise upward to lock the second locking member 1072. The second locking member 1072 is connected to the side of the moving connecting plate 172 facing away from the stationary connecting plate 173. The rotating shaft bracket 1 includes a first protrusion 1073. In the closed state, the hook of the first locking member 1071 is misaligned with the hanging hole of the second locking member 1072, and the first locking member 1071 does not lock the second locking member 1072. When the vacuum molded case circuit breaker trips due to a short circuit, the electric repulsive force between the moving connecting plate 172 and the stationary connecting plate 173 drives the moving contact 11 away from the stationary contact 12. As the direction of movement occurs, the second locking member 1072 moves towards the first locking member 1071 along with the connecting plate 172, so that the hanging hole of the second locking member 1072 corresponds to the hook of the first locking member 1071, thereby locking the second locking member 1072 and the first locking member 1071. The protection mechanism also triggers the operating mechanism 100 to release, but the release action of the operating mechanism 100 is later than the movement of the connecting plate 172 driven by the electric repulsion force. After the operating mechanism 100 releases, it drives the rotating shaft bracket 1 to rotate clockwise, and the first protrusion 1073 abuts against the first locking member 1071, and drives the first locking member 1071 to rotate counterclockwise, thereby unlocking the second locking member 1072 and the first locking member 1071.

[0075] Preferably, the vacuum molded case circuit breaker includes a contact spring connected to the moving contact 11 for driving the moving contact 11 to close. Since this embodiment is a vacuum interrupter 104, the moving contact support 16 moves in and out of the vacuum interrupter 104, causing a change in the pressure inside the vacuum interrupter 104. After the moving contact 11 and the stationary contact 12 are pushed apart, the moving contact support 16 slides out of the vacuum interrupter 104, reducing the pressure inside the vacuum interrupter 104 and increasing the pressure difference inside and outside the vacuum interrupter 1041. Under the action of atmospheric pressure, it also has the force to drive the moving contact 11 and the stationary contact 12 to close. Alternatively, the contact spring may not be provided.

[0076] 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.

[0077] 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 drive structure for a rotating shaft and a moving contact, wherein the rotating shaft includes at least one rotating shaft support (1), the rotating shaft support (1) is rotatably disposed and is provided with a support drive part connected to an operating mechanism (100); Its features are, The rotating shaft bracket (1) is rotatably mounted with an elastic element bracket (2) and a linkage element (4). At least one elastic element (3) is connected between the elastic element bracket (2) and the rotating shaft bracket (1). The linkage element (4) includes a first linkage part (41) and a second linkage part (42) located on both sides of the rotation axis (43) of the linkage element (4). The first linkage part (41) is hinged to the second connecting rod (51) and drives the moving contact (11) to reciprocate in a straight line through the second connecting rod (51). The elastic element (3) drives the linkage element (4) to move the second linkage part through the elastic element bracket (2) acting on the first linkage part (41). (42) It is stopped by the rotating shaft bracket (1); when the rotating shaft bracket (1) rotates from the second position to the first position, the rotating shaft bracket (1) pushes the first linkage part (41) through the elastic element (3) and the elastic element bracket (2). The first linkage part (41) drives the moving contact (11) to move linearly and contact the stationary contact (12) through the second link (51). When the rotating shaft bracket (1) rotates clockwise from the first position to the second position, the rotating shaft bracket (1) pushes the second linkage part (42) so that the first linkage part (41) drives the moving contact (11) to move linearly and separate from the stationary contact (12) through the second link (51).

2. The driving structure for the rotating shaft and moving contact according to claim 1, characterized in that, The pivot bracket (1) includes a third side plate (14) and a fourth side plate (15) that are opposite and parallel to each other, and a rear side plate (161) connecting the third side plate (14) and the fourth side plate (15). The linkage (4) and the elastic element bracket (2) are rotatably installed between the third side plate (14) and the fourth side plate (15). The elastic element (3) is connected between the rear side plate (161) and the elastic element bracket (2).

3. The driving structure for the rotating shaft and moving contact according to claim 2, characterized in that, The bottom of the rear side plate (161) forms a first limiting part (13), which cooperates with or separates from the second linkage part (42).

4. The driving structure for the rotating shaft and moving contact according to claim 3, characterized in that, The line connecting the first linkage part (41) to the rotation axis (43) forms an obtuse angle with the line connecting the second linkage part (42) to the rotation axis (43), and the second linkage part (42) extends below the first limiting part (13).

5. The driving structure for the rotating shaft and moving contact according to claim 1, characterized in that, The rotation axis (43) of the linkage (4) coincides with the rotation axis of the rotating shaft bracket (1).

6. The driving structure for the rotating shaft and moving contact according to claim 1, characterized in that, The linkage (4) includes a first side plate (471) and a second side plate (472) that are opposite and parallel to each other, and a structural reinforcement plate (473) connecting the first side plate (471) and the second side plate (472). Two parallel first rotating rods (45) and second rotating rods (46) are connected between the first side plate (471) and the second side plate (472). The first rotating rod (45) abuts against the elastic element bracket (2). The linkage (4) is installed in the contact support through the second rotating rod (46).

7. The driving structure for the rotating shaft and moving contact according to claim 6, characterized in that, The elastic element bracket (2) includes an elastic element bracket mounting part (21), an elastic element mounting part (22), and an elastic element bracket linkage part (23) connected in sequence. The elastic element bracket mounting part (21) is rotatably connected to the rotating shaft bracket (1). The elastic element mounting part (22) is connected to the elastic element (3). The elastic element bracket linkage part (23) extends between the first side plate (471) and the second side plate (472) of the linkage part (4) and abuts against the first rotating rod (45).

8. The driving structure for the rotating shaft and moving contact according to claim 7, characterized in that, The first side plate (471) and the second side plate (472) protrude to form two protrusions, and the two ends of the first rotating rod (45) are mounted on the two protrusions; the elastic element mounting part (22) is bent and connected to the elastic element bracket linkage part (23).

9. The driving structure for the rotating shaft and moving contact according to claim 6, characterized in that, The two ends of the second rotating rod (46) extend out of the first side plate (471) and the second side plate (472) of the linkage member (4) to form the second rotating rod mounting part. The two sides of the rotating shaft bracket (1) include a third side plate (14), a fourth side plate (15) and a rear side plate (161) connecting the third side plate (14) and the fourth side plate (15). The third side plate (14) and the fourth side plate (15) are provided with linkage member mounting grooves (17), and the second rotating rod mounting part is installed in the linkage member mounting grooves (17).

10. The driving structure for the rotating shaft and moving contact according to claim 9, characterized in that, The linkage mounting groove (17) includes a first outer sliding groove (174), a first inner sliding groove (175), and a first limiting groove (176). The first outer sliding groove (174) and the first inner sliding groove (175) extend towards the rear side plate (161) to the first limiting groove (176). An annular gasket (181) is also fitted on the second rotating rod mounting part. The thickness of the annular gasket (181) is less than the length of the second rotating rod mounting part, so that the second rotating rod mounting part forms a protrusion relative to the annular gasket (181). The annular gasket (181) is placed in the first outer sliding groove (174), and the protrusion is placed in the first inner sliding groove (175). The linkage (4) is moved along the first... The outer slide groove (174) and the first inner slide groove (175) slide towards the rear side plate (161) into the first limiting groove (176). The annular gasket (181) is placed in the first limiting groove (176) and drives the annular gasket (181) to slide away from the linkage member (4) along the second rotating rod mounting part. The second rotating rod mounting part is also provided with a second annular slot (182). After the annular gasket (181) slides to the bottom of the first limiting groove (176), the second annular slot (182) is located between the annular gasket (181) and the linkage member (4). The second card (183) is inserted into the second annular slot (182) to limit the second rotating rod (46) from moving axially.

11. The driving structure for the rotating shaft and moving contact according to claim 3, characterized in that, When the rotating shaft support (1) is in the first position of the closed state, there is a force relief gap (48) between the first limiting part (13) and the second linkage part (42); during the rotation of the rotating shaft support (1) from the first position to the second position of the open state, and when the contact support is in the second position, the first limiting part (13) and the second linkage part (42) abut against each other.

12. The driving structure for the rotating shaft and moving contact according to claim 1, characterized in that, It also includes a moving contact support (16) and an insulating bracket (171), the moving contact support (16) being connected between the moving contact (11) and the second link (51), the moving contact support (16) sliding linearly within the insulating bracket (171).

13. The driving structure for the rotating shaft and moving contact according to claim 12, characterized in that, It also includes a repulsion mechanism (106) and a locking mechanism (107) that cooperate to lock. The repulsion mechanism (106) is connected to the moving contact support (16). When a short-circuit current passes through the repulsion mechanism (106), the repulsion mechanism (106) drives the moving contact support (16), and the moving contact support (16) drives the moving contact (11) to move in a straight line away from the stationary contact (12), so that the locking mechanism (107) locks the repulsion mechanism (106).

14. The driving structure for the rotating shaft and moving contact according to claim 13, characterized in that, The repulsion mechanism (106) includes a moving connecting plate (172) and a stationary connecting plate (173) that are spaced apart and arranged in parallel. The moving connecting plate (172) and the stationary connecting plate (173) are electrically connected by a flexible conductor. One end of the moving contact support (16) is insulated and passes through the stationary connecting plate (173) and connects to one side of the moving connecting plate (172). The other side of the moving connecting plate (172) is connected to the second connecting rod (51) and locks in place with the repulsion mechanism (106).

15. A vacuum molded case circuit breaker, comprising a vacuum interrupter (104), characterized in that, The drive structure includes the rotating shaft and moving contact as described in any one of claims 1-14, wherein at least the contact portion of the moving contact (11) and the stationary contact (12) is located inside the vacuum interrupter (104), and also includes a moving contact support (16), wherein the moving contact support (16) extends into the vacuum interrupter (104) and is connected to the moving contact (11), and a second connecting rod (51) is connected between the moving contact support (16) and the first linkage portion (41) of the linkage member (4).

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