Vacuum circuit breaker and isolating switch

Abstract

The invention discloses a vacuum circuit breaker and an isolating switch, and relates to the technical field of electrics. The vacuum circuit breaker comprises a shell and an operating mechanism, a transmission assembly, a linkage rod, a vacuum bubble, a moving contact and a static contact which are arranged in the shell, the operating mechanism is connected with the transmission assembly, one end of the linkage rod is connected with the transmission assembly, the other end of the linkage rod is connected with the moving contact, and the moving contact and the static contact are oppositely arranged at the two ends of the vacuum bubble. The moving contact is matched with the vacuum bubble, the sliding direction of the moving contact is the same as the axial direction of the linkage rod, and the operating mechanism is used for driving the linkage rod to move in the axial direction of the linkage rod through the transmission assembly so that the moving contact and the static contact can be switched on and switched off in the vacuum bubble. According to the vacuum circuit breaker provided by the invention, the opening distance of the contact can be reduced as much as possible under the condition that the high-voltage breaking capacity is ensured, the occupied space is reduced, the universality is improved, the arc extinguishing effect is enhanced, and the safety is ensured.

Description

Technical Field

[0001] This invention relates to the field of electrical technology, and more specifically, to a vacuum circuit breaker and a disconnecting switch. Background Technology

[0002] The function of a disconnecting switch is to control the on / off state of the load in a circuit, ensuring the safe operation of electrical appliances. To withstand larger DC voltages, current disconnecting switches generally employ two methods: one is to increase the number of phases in the moving and stationary contacts, with each pair connected in series to achieve a voltage divider effect, thus reducing the voltage across each contact; the other is to increase the contact gap of the single-pole contacts and the arc-extinguishing length of the corresponding arc-extinguishing components, thereby improving the arc-breaking capability of the single-pole contacts. However, both methods result in a larger disconnecting switch size and increased space requirements, making it unsuitable for installations in confined spaces and affecting its versatility.

[0003] Therefore, there is an urgent need for a disconnecting switch product with a small contact gap, small footprint, good arc extinguishing effect, and strong versatility. Summary of the Invention

[0004] The purpose of this application is to provide a vacuum circuit breaker and disconnector that can minimize the contact gap, reduce the space occupied, improve versatility, enhance arc extinguishing effect, and ensure safety while ensuring high voltage breaking capacity.

[0005] The embodiments of this application are implemented as follows: A first aspect of this application provides a vacuum circuit breaker, including a housing and an operating mechanism, a transmission assembly, a linkage rod, a vacuum bulb, a moving contact, and a stationary contact disposed within the housing. The operating mechanism is connected to the transmission assembly. One end of the linkage rod is connected to the transmission assembly, and the other end is connected to the moving contact. The moving contact and the stationary contact are disposed opposite to each other at both ends of the vacuum bulb, and both extend at least partially into the vacuum bulb. The moving contact cooperates with the vacuum bulb, and the sliding direction of the moving contact is the same as the axial direction of the linkage rod. The operating mechanism is used to drive the linkage rod to move along its axial direction through the transmission assembly, so that the moving contact and the stationary contact open and close within the vacuum bulb.

[0006] In one possible implementation, the operating mechanism includes an operating part and a transmission part that are connected by a transmission mechanism. The operating part extends outside the housing, and the transmission part is connected by a transmission assembly. The operating part is used to drive the transmission part to move, so as to drive the moving contact to close with the stationary contact in sequence through the transmission assembly and the linkage rod. The transmission part is used to drive the moving contact to open with the stationary contact in sequence through the transmission assembly and the linkage rod.

[0007] As an implementable mode, the transmission assembly comprises a transmission connecting rod, a rotating connecting rod and a matching block, the shell is provided with a positioning shaft, the rotating connecting rod is matched with the positioning shaft, the rotating connecting rod can rotate relative to the positioning shaft, one end of the rotating connecting rod is rotationally connected with the transmission connecting rod, the other end is rotationally connected with the matching block, the transmission connecting rod is rotationally connected with the operating mechanism, the matching block is connected with the linkage rod and is in sliding fit with the shell, and the sliding direction of the matching block is the same as the axial direction of the linkage rod.

[0008] As an implementable mode, the movable contact comprises a sliding part, a first connecting part and a first contact part connected in sequence, the sliding part is in sliding fit with the vacuum bulb, the cross-sectional area of the first connecting part is smaller than that of the first contact part; The fixed contact comprises a fixed part, a second connecting part and a second contact part connected in sequence, the fixed part is connected with the vacuum bulb, the cross-sectional area of the second connecting part is smaller than that of the second contact part; The first contact part is used for closing with the second contact part when closing, and is used for separating from the second contact part when opening.

[0009] As an implementable mode, the vacuum circuit breaker further comprises a first wiring row, a second wiring row and a flexible connecting piece arranged in the shell, the first wiring row is connected with the movable contact through the flexible connecting piece, the flexible connecting piece is used for deforming when the movable contact slides, and the second wiring row is connected with the fixed contact.

[0010] As an implementable mode, the vacuum circuit breaker further comprises a clamping head, one end of the flexible connecting piece is connected with the first wiring row, the other end is connected with the clamping head, and the clamping head clamps the movable contact.

[0011] As an implementable mode, the flexible connecting piece comprises a connecting beam, the connecting beam is in U shape, and the connecting beam comprises a first straight segment, an arc segment and a second straight segment connected in sequence, the first straight segment is welded with the first wiring row, and the second straight segment is welded with the clamping head.

[0012] As an implementable mode, the number of the connecting beams is plural, and the plural connecting beams are arranged in parallel and at intervals.

[0013] As an implementable mode, the first wiring row is provided with a first protruding part, the flexible connecting piece is connected between the first protruding part and the movable contact, the first protruding part is provided with a limiting opening, the linkage rod passes through the limiting opening and is in sliding fit with the limiting opening, and the linkage rod is made of insulating material. And / or, the second wiring row is provided with a second protruding part, and the fixed contact is connected with the second protruding part.

[0014] According to the second aspect of the embodiment of the application, a disconnector is provided, which comprises the above-mentioned vacuum circuit breaker. The disconnector can minimize the contact opening distance, reduce the occupied space, improve the versatility, enhance the arc extinguishing effect and ensure the safety under the condition of ensuring the high-voltage breaking capacity.

[0015] The beneficial effects of the embodiments of the present application include: The vacuum circuit breaker comprises a shell, an operating mechanism, a transmission assembly, a linkage rod, a vacuum bulb, a moving contact and a stationary contact arranged in the shell, the operating mechanism is connected with the transmission assembly, one end of the linkage rod is connected with the transmission assembly, the other end of the linkage rod is connected with the moving contact, the moving contact and the stationary contact are oppositely arranged at two ends of the vacuum bulb and at least partially arranged in the vacuum bulb, the moving contact is matched with the vacuum bulb, the sliding direction of the moving contact is the same as the axial direction of the linkage rod, and the operating mechanism is used to drive the linkage rod to move along the axial direction through the transmission assembly, so that the moving contact and the stationary contact are opened and closed in the vacuum bulb. The vacuum circuit breaker provided by the present application can make the moving contact and the stationary contact open and close in the vacuum environment in the vacuum bulb through the moving contact and the stationary contact oppositely arranged at two ends of the vacuum bulb and the linkage rod and the transmission assembly connected with the moving contact in sequence. Since the insulation strength of the vacuum environment is more than 10 times the insulation strength of the air environment, only a small contact opening distance is needed to realize the breaking of the moving contact and the stationary contact under high-voltage conditions, and the number of phases of the moving contact and the stationary contact does not need to be increased, so that the contact opening distance is minimized, the occupied space is reduced, the universality is improved, the arc extinguishing effect is enhanced, and the safety is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 The structure schematic diagram of the vacuum circuit breaker provided by the embodiments of the present application is shown in the figure. Figure 2 The structure schematic diagram of the vacuum circuit breaker provided by the embodiments of the present application is shown in the figure. Figure 3 The structure schematic diagram of the vacuum circuit breaker provided by the embodiments of the present application is shown in the figure. Figure 4 The structure schematic diagram of the vacuum circuit breaker provided by the embodiments of the present application is shown in the figure. Figure 5 The axial view of the vacuum circuit breaker provided by the embodiments of the present application is shown in the figure. Figure 6 The front view of the vacuum circuit breaker provided by the embodiments of the present application is shown in the figure.

[0018] Icon: 100 - vacuum circuit breaker; 110 - housing; 111 - positioning shaft; 120 - operating mechanism; 121 - operating part; 122 - transmission part; 130 - transmission assembly; 131 - transmission connecting rod; 132 - rotating connecting rod; 133 - matching block; 140 - linkage rod; 150 - vacuum bubble; 160 - moving contact; 161 - sliding part; 162 - first connecting part; 163 - first contact part; 170 - stationary contact; 171 - fixed part; 172 - second connecting part; 173 - second contact part; 180 - first wiring row; 181 - first protruding part; 182 - limiting port; 190 - second wiring row; 191 - second protruding part; 200 - soft connecting piece; 201 - connecting beam; 202 - first straight segment; 203 - arc segment; 204 - second straight segment; 210 - clamping head. DETAILED DESCRIPTION

[0019] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0021] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0022] In the description of the present application, it should be noted that the terms "inner", "outer", "upper", "lower", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0023] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, features in the following embodiments can be combined with each other.

[0025] Please refer to the reference. Figure 1 and Figure 2 This invention provides a vacuum circuit breaker 100 for achieving circuit breaking function. It minimizes contact distance, reduces space occupation, improves versatility, enhances arc extinguishing effect, and ensures safety while maintaining high-voltage breaking capacity.

[0026] The vacuum circuit breaker 100 includes a housing 110 and an operating mechanism 120, a transmission assembly 130, a linkage rod 140, a vacuum bulb 150, a moving contact 160, and a stationary contact 170 disposed within the housing 110. The operating mechanism 120 is connected to the transmission assembly 130, and one end of the linkage rod 140 is connected to the transmission assembly 130, while the other end is connected to the moving contact 160. The operating mechanism 120 can sequentially drive the moving contact 160 to move via the transmission assembly 130 and the linkage rod 140. The moving contact 160 and the stationary contact 170 are disposed opposite to each other at both ends of the vacuum bulb 150, and both extend at least partially into the vacuum bulb 150. The moving contact 160 cooperates with the vacuum bulb 150, and the stationary contact 170 is fixedly connected to the vacuum bulb 150. The sliding direction of the moving contact 160 is the same as the axial direction of the linkage rod 140. The operating mechanism 120 is used to drive the linkage rod 140 to move along its axial direction through the transmission assembly 130, so that the moving contact 160 and the stationary contact 170 open and close within the vacuum bulb 150.

[0027] The vacuum circuit breaker 100 provided in the application can make the movable contact 160 and the static contact 170 open and close under the vacuum environment in the vacuum bulb 150 by relatively arranging the movable contact 160 and the static contact 170 at the two ends of the vacuum bulb 150 and sequentially connecting the linkage rod 140 and the transmission assembly 130 with the movable contact 160. Since the insulation strength of the vacuum environment is more than 10 times of the insulation strength of the air environment, only a small contact opening distance is needed to realize the breaking of the movable contact 160 and the static contact 170 under high voltage conditions, and the number of phases of the movable contact 160 and the static contact 170 does not need to be increased, so that the contact opening distance is minimized under the condition of ensuring the high voltage breaking capacity, the occupied space is reduced, the universality is improved, the arc extinguishing effect is enhanced, and the safety is ensured.

[0028] In the embodiment, the movable contact 160 and the static contact 170 are arranged at the two ends of the vacuum bulb 150 and partially extend into the vacuum bulb 150, the movable contact 160 is in sliding fit with the vacuum bulb 150, the movable contact 160 can slide relative to the vacuum bulb 150, and the vacuum bulb 150 can guide and limit the movable contact 160. However, it is not limited to this, in other embodiments, the movable contact 160 and the static contact 170 can also fully extend into the vacuum bulb 150, at this time, sealing elements are arranged between the movable contact 160 and the vacuum bulb 150 and between the static contact 170 and the vacuum bulb 150 for sealing; the movable contact 160 can also swing relative to the vacuum bulb 150; the length of the movable contact 160 and the static contact 170 extending into the vacuum bulb 150 and the movement mode of the movable contact 160 are not limited.

[0029] The operating mechanism 120 comprises an operating part 121 and a transmission part 122 connected in transmission. The operating part 121 extends out of the shell 110 for facilitating operation, and the transmission part 122 is connected in transmission with the transmission assembly 130. The operating part 121 is configured to drive the transmission part 122 to move, so as to drive the movable contact 160 and the static contact 170 to close in sequence through the transmission assembly 130 and the linkage rod 140, and the transmission part 122 is configured to drive the movable contact 160 and the static contact 170 to open in sequence through the transmission assembly 130 and the linkage rod 140. Specifically, during the closing process of the vacuum circuit breaker 100, the operating part 121 is driven to drive the movable contact 160 to slide relative to the vacuum bulb 150 in sequence through the transmission part 122, the transmission assembly 130 and the linkage rod 140, so as to gradually move the movable contact 160 to the static contact 170 until the movable contact 160 and the static contact 170 are in contact, and the closing is completed. During the process, since the vacuum environment in the vacuum bulb 150 has high insulation strength, the movable contact 160 and the static contact 170 will not generate arc or extremely small arc during the closing process, and the safety is high. During the opening process of the vacuum circuit breaker 100, the transmission part 122 drives the movable contact 160 to slide relative to the vacuum bulb 150 in sequence through the transmission assembly 130 and the linkage rod 140, so as to separate the movable contact 160 from the static contact 170 and gradually move away from the static contact 170, and the opening is completed. During the process, since the vacuum environment in the vacuum bulb 150 has high insulation strength, the movable contact 160 and the static contact 170 will not generate arc or extremely small arc during the opening process, the arc extinguishing effect is good, and the safety is high.

[0030] Please refer to Figure 3 The transmission assembly 130 comprises a transmission connecting rod 131, a rotating connecting rod 132 and a matching block 133. The shell 110 is provided with a positioning shaft 111, the rotating connecting rod 132 is matched with the positioning shaft 111, the rotating connecting rod 132 can rotate relative to the positioning shaft 111, and the positioning shaft 111 can limit the rotating connecting rod 132. One end of the rotating connecting rod 132 is rotationally connected with the transmission connecting rod 131, the other end is rotationally connected with the matching block 133, the transmission connecting rod 131 is rotationally connected with the transmission part 122 of the operating mechanism 120, the matching block 133 is connected with the linkage rod 140 and is in sliding fit with the shell 110, and the sliding direction of the matching block 133 is the same as the axial direction of the linkage rod 140. Specifically, the transmission part 122 can drive the transmission connecting rod 131 to rotate, so as to drive the rotating connecting rod 132 to rotate relative to the positioning shaft 111, thereby driving the matching block 133 to slide relative to the shell 110, and further driving the movable contact 160 to slide relative to the vacuum bulb 150 through the linkage rod 140, so as to realize the closing and opening functions.

[0031] Please refer to Figure 4As an implementable manner, the moving contact 160 comprises a sliding part 161, a first connecting part 162 and a first contact part 163 connected in sequence. The sliding part 161 is in sliding fit with the vacuum bubble 150, the sliding part 161 can slide relative to the vacuum bubble 150, the vacuum bubble 150 can guide and limit the sliding part 161, the sliding part 161 can drive the first contact part 163 to move through the first connecting part 162, the first contact part 163 is used for opening and closing with the stationary contact 170, and the cross-sectional area of the first connecting part 162 is smaller than that of the first contact part 163.

[0032] The stationary contact 170 comprises a fixed part 171, a second connecting part 172 and a second contact part 173 connected in sequence. The fixed part 171 is fixedly connected with the vacuum bubble 150, and the cross-sectional area of the second connecting part 172 is smaller than that of the second contact part 173. Specifically, the first contact part 163 is used for closing with the second contact part 173 when closing, and the first contact part 163 is also used for separating from the second contact part 173 when opening. Since the cross-sectional areas of the first contact part 163 and the second contact part 173 are large, the contact area of the moving contact 160 and the stationary contact 170 when closing is also large, so as to improve the current carrying capacity and ensure that the through current meets the requirements.

[0033] Please continue to refer to Figure 2 As an implementable manner, the vacuum circuit breaker 100 further comprises a first wiring row 180, a second wiring row 190 and a flexible connecting piece 200 arranged in the shell 110. The first wiring row 180 is connected with the moving contact 160 through the flexible connecting piece 200, so as to realize the wiring function of the moving contact 160. The flexible connecting piece 200 is used for deforming when the moving contact 160 slides, so as to ensure the connection stability of the moving contact 160 with the first wiring row 180 during the opening and closing process. The second wiring row 190 is connected with the stationary contact 170, so as to realize the wiring function of the stationary contact 170.

[0034] In this embodiment, the first wiring row 180 is an incoming line row, and the second wiring row 190 is an outgoing line row, that is, the first wiring row 180 is used for guiding current into the moving contact 160, and the second wiring row 190 is used for guiding current out of the stationary contact 170. However, it is not limited to this. In other embodiments, the first wiring row 180 can also be an outgoing line row, and the second wiring row 190 is an incoming line row. The current flow direction of the first wiring row 180, the moving contact 160, the stationary contact 170 and the second wiring row 190 is not limited specifically.

[0035] As an implementable mode, the vacuum circuit breaker 100 further comprises a clamping head 210. One end of the flexible connector 200 is connected with the first wiring row 180, and the other end is connected with the clamping head 210, and the clamping head 210 is clamped on the movable contact 160 to realize the quick disassembly function, so as to facilitate the quick installation and disassembly of the movable contact 160 and the flexible connector 200. Specifically, the sliding part 161 of the movable contact 160 is partially arranged outside the vacuum bulb 150, and the clamping head 210 is clamped on the part of the sliding part 161. In this embodiment, one end of the flexible connector 200 is welded with the first wiring row 180, and the other end is welded with the clamping head 210, so as to improve the connection strength and ensure the conduction effect.

[0036] Please refer to Figure 5 and Figure 6 Further, the flexible connector 200 comprises a connecting beam 201. The connecting beam 201 is in a U shape, and the connecting beam 201 comprises a first straight line segment 202, an arc segment 203 and a second straight line segment 204 connected in sequence, wherein the first straight line segment 202 is welded with the first wiring row 180, the second straight line segment 204 is welded with the clamping head 210, and the arc segment 203 can be deformed during the sliding of the movable contact 160 relative to the vacuum bulb 150. Specifically, the first wiring row 180 and the second wiring row 190 are both fixedly installed in the shell 110, that is, the positions of the first wiring row 180 and the second wiring row 190 will not change, and during the opening and closing process, the movable contact 160 slides relative to the vacuum bulb 150 to drive the movement of the clamping head 210. Since the position of the first wiring row 180 does not change, the connecting beam 201 is connected between the clamping head 210 and the first wiring row 180, so the connecting beam 201 will be deformed along with the clamping head 210.

[0037] As an implementable mode, the connecting beam 201 is made of copper material, which has good conductivity and plastic deformation ability, and can ensure the conduction effect while deforming along with the movable contact 160.

[0038] As an implementable mode, the number of the connecting beam 201 is multiple, and the multiple connecting beams 201 are arranged in parallel and at intervals, and the multiple connecting beams 201 act together to further enhance the conduction effect, ensure that the path current meets the requirements, and the multiple connecting beams 201 deform simultaneously during the opening and closing process, which can effectively avoid fatigue fracture and prolong the service life of the flexible connector 200.

[0039] In this embodiment, the number of the connecting beam 201 is three, but it is not limited thereto. In other embodiments, the number of the connecting beam 201 can be two or five, and the number of the connecting beam 201 is not specifically limited.

[0040] As an implementable mode, the first wiring strip 180 is provided with a first protruding part 181, and the soft connecting piece 200 is connected between the first protruding part 181 and the movable contact 160, so as to realize the conduction function of the movable contact 160 and the first protruding part 181. Specifically, the first protruding part 181 is provided with a limiting opening 182, the linkage rod 140 is arranged through the limiting opening 182 and is in sliding fit with the limiting opening 182, the linkage rod 140 can slide relative to the limiting opening 182, the inner wall of the limiting opening 182 can guide and limit the linkage rod 140, so as to ensure that the linkage rod 140 can only slide in the axial direction, and the stability of the linkage rod 140 in the sliding process is improved. Further, the linkage rod 140 is made of insulating material, the linkage rod 140 does not have the conduction function, and the movable contact 160 is conducted with the first protruding part 181 of the first wiring strip 180 through the soft connecting piece 200.

[0041] As an implementable mode, the second wiring strip 190 is provided with a second protruding part 191, and the fixed contact 170 is connected to the second protruding part 191. Specifically, the fixed part 171 of the fixed contact 170 partially protrudes from the vacuum bubble 150, and the second protruding part 191 is welded with the fixed part 171, so as to improve the connection strength and ensure the conduction effect.

[0042] The embodiment of the present application also provides an isolating switch (not shown in the figure) comprising the vacuum circuit breaker 100. Since the structure and beneficial effects of the vacuum circuit breaker 100 have been described in detail in the foregoing embodiment, the description is not repeated here.

[0043] The above is only an optional embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A vacuum circuit breaker, characterized in that, The device includes a housing (110) and an operating mechanism (120), a transmission assembly (130), a linkage rod (140), a vacuum bulb (150), a moving contact (160), and a stationary contact (170) disposed within the housing (110). The operating mechanism (120) is connected to the transmission assembly (130). One end of the linkage rod (140) is connected to the transmission assembly (130), and the other end is connected to the moving contact (160). The moving contact (160) and the stationary contact (170) are positioned opposite each other. The moving contact (160) is positioned at both ends of the vacuum bulb (150) and extends at least partially into the vacuum bulb (150). The sliding direction of the moving contact (160) is the same as the axial direction of the linkage rod (140). The operating mechanism (120) is used to drive the linkage rod (140) to move along its axial direction through the transmission assembly (130) so that the moving contact (160) and the stationary contact (170) open and close within the vacuum bulb (150).

2. The vacuum circuit breaker according to claim 1, characterized in that, The operating mechanism (120) includes an operating part (121) and a transmission part (122) connected by transmission. The operating part (121) extends outside the housing (110), and the transmission part (122) is connected to the transmission assembly (130). The operating part (121) is driven to move the transmission part (122) to sequentially drive the moving contact (160) and the stationary contact (170) to close through the transmission assembly (130) and the linkage rod (140). The transmission part (122) is used to sequentially drive the moving contact (160) and the stationary contact (170) to open through the transmission assembly (130) and the linkage rod (140).

3. The vacuum circuit breaker according to claim 1, characterized in that, The transmission assembly (130) includes a transmission link (131), a rotating link (132), and a mating block (133). The housing (110) is provided with a positioning shaft (111). The rotating link (132) is mated with the positioning shaft (111). The rotating link (132) is rotatable relative to the positioning shaft (111). One end of the rotating link (132) is rotatably connected to the transmission link (131), and the other end is rotatably connected to the mating block (133). The transmission link (131) is rotatably connected to the operating mechanism (120). The mating block (133) is connected to the linkage rod (140) and is slidably mated with the housing (110). The sliding direction of the mating block (133) is the same as the axial direction of the linkage rod (140).

4. The vacuum circuit breaker according to claim 1, characterized in that, The moving contact (160) includes a sliding part (161), a first connecting part (162) and a first contact part (163) connected in sequence. The sliding part (161) is slidably engaged with the vacuum bubble (150). The cross-sectional area of ​​the first connecting part (162) is smaller than the cross-sectional area of ​​the first contact part (163). The stationary contact (170) includes a fixing part (171), a second connecting part (172), and a second contact part (173) connected in sequence. The fixing part (171) is connected to the vacuum bubble (150), and the cross-sectional area of ​​the second connecting part (172) is smaller than the cross-sectional area of ​​the second contact part (173). The first contact part (163) is used to close with the second contact part (173) when the circuit is closed, and the first contact part (163) is also used to separate from the second contact part (173) when the circuit is opened.

5. The vacuum circuit breaker according to any one of claims 1-4, characterized in that, The vacuum circuit breaker further includes a first terminal block (180), a second terminal block (190), and a flexible connector (200) disposed within the housing (110). The first terminal block (180) is connected to the moving contact (160) via the flexible connector (200), and the flexible connector (200) is used to deform when the moving contact (160) slides. The second terminal block (190) is connected to the stationary contact (170).

6. The vacuum circuit breaker according to claim 5, characterized in that, The vacuum circuit breaker also includes a clamping head (210), one end of the flexible connector (200) is connected to the first terminal block (180), and the other end is connected to the clamping head (210), which clamps the moving contact (160).

7. The vacuum circuit breaker according to claim 6, characterized in that, The flexible connector (200) includes a connecting beam (201) which is U-shaped. The connecting beam (201) includes a first straight segment (202), an arc segment (203), and a second straight segment (204) connected in sequence. The first straight segment (202) is welded to the first terminal block (180), and the second straight segment (204) is welded to the clamping head (210).

8. The vacuum circuit breaker according to claim 7, characterized in that, The number of the connecting beams (201) is multiple, and the multiple connecting beams (201) are arranged in parallel at intervals.

9. The vacuum circuit breaker according to claim 5, characterized in that, The first terminal block (180) is provided with a first protrusion (181), the flexible connector (200) is connected between the first protrusion (181) and the moving contact (160), the first protrusion (181) is provided with a limiting port (182), the linkage rod (140) is provided through the limiting port (182) and is slidably engaged with the limiting port (182), and the linkage rod (140) is made of insulating material; And / or, the second terminal block (190) is provided with a second protrusion (191), and the stationary contact (170) is connected to the second protrusion (191).

10. A disconnecting switch, characterized in that, Includes the vacuum circuit breaker as described in any one of claims 1-9.

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