Air blocking movable contact mechanism and switchgear

Abstract

The application discloses a gas-blocking movable contact mechanism and a switch electric appliance. The gas-blocking movable contact mechanism comprises a centering rotating shaft, a driving assembly configured to be connected with an external driving mechanism, a movable contact rotatably installed on the centering rotating shaft and connected with the driving assembly, the driving assembly being used for driving the movable contact to rotate around the centering rotating shaft, the movable contact having a movable contact point, and a gas-blocking part comprising a gas-blocking connecting part and a gas-blocking main part, one end of the gas-blocking connecting part being rotatably installed on the centering rotating shaft, the other end being connected with the gas-blocking main part, the gas-blocking main part being in a plate-shaped structure spaced from the centering rotating shaft, the gas-blocking main part having a driving hole penetratingly arranged, the movable contact being arranged in the driving hole, and the movable contact point being arranged to penetrate out of the driving hole in a direction away from the centering rotating shaft. The gas-blocking movable contact mechanism and the switch electric appliance have a gas-blocking effect, can effectively extinguish arc, and improve the breaking capacity of the switch electric appliance as a whole.

Description

Technical Field

[0001] This application belongs to the field of low-voltage electrical technology, and particularly relates to a gas-blocking moving contact mechanism and a switching device. Background Technology

[0002] When the arc extinguishing system of a switching device needs to extinguish the arc, the gas generating component needs to generate flowing gas to blow the electric arc generated by the contact structure into the arc extinguishing system in order to achieve the arc cutting effect and ensure the reliability of the break.

[0003] However, the gas generated by the gas-generating component is prone to backflow into the contact structure and leakage from the contact structure, resulting in weak gas pressure inside the arc-extinguishing system and poor arc blowing effect. This causes the arc to fall to the contact structure, leading to back-side breakdown and affecting the overall breaking capacity of the switchgear. Utility Model Content

[0004] This application provides an air-blocking moving contact mechanism and a switchgear, which has an air-blocking effect, enabling the switchgear to effectively extinguish arcs and improve the overall breaking capacity of the switchgear.

[0005] This application provides a gas-blocking moving contact mechanism, comprising: a centering shaft; a drive assembly configured to be connected to an external drive mechanism; a moving contact rotatably mounted on the centering shaft and connected to the drive assembly, the drive assembly driving the moving contact to rotate around the centering shaft, the moving contact having a moving contact point; and a gas-blocking component comprising a gas-blocking connecting portion and a gas-blocking main body portion, one end of the gas-blocking connecting portion being rotatably mounted on the centering shaft and the other end being connected to the gas-blocking main body portion, the gas-blocking main body portion having a plate-like structure spaced apart from the centering shaft, the gas-blocking main body portion having a through-hole drive hole, the moving contact passing through the drive hole, and the moving contact point extending out of the drive hole in a direction away from the centering shaft.

[0006] In the above-mentioned air-blocking moving contact mechanism, both ends of the air-blocking main body are connected to the air-blocking connecting part in the axial direction. The air-blocking connecting part is set in a plate-like structure, and the width of the air-blocking connecting part increases along the direction from the centering shaft to the air-blocking main body.

[0007] In the above-mentioned air-blocking moving contact mechanism, the air-blocking main body has an open cylindrical structure, and the rotation center of the air-blocking main body is set to coincide with the centering shaft.

[0008] In the above-mentioned air-blocking moving contact mechanism, the drive assembly includes a drive spindle and a drive connector. The drive spindle is rotatably mounted on a centering shaft and connected to an external drive mechanism. The drive connector is connected between the drive spindle and the moving contact. The drive spindle drives the moving contact to rotate through the drive connector.

[0009] The above-mentioned air-blocking moving contact mechanism includes a drive spindle comprising a spindle body and a spindle connecting part. The spindle body is a cylindrical structure with an opening, and the spindle connecting part is a plate-like structure that is vertically connected to the inner circumferential surface of the spindle body. The spindle connecting part is sleeved on the centering shaft and rotates in contact with the centering shaft.

[0010] In the above-mentioned air-blocking moving contact mechanism, the drive spindle includes at least two spindle connecting parts, which are spaced apart axially on the centering shaft and are evenly located between the two air-blocking connecting parts.

[0011] In the above-mentioned air-blocking moving contact mechanism, the two ends of the drive connector are respectively connected to the main shaft connection and the moving contact.

[0012] In the above-mentioned air-blocking moving contact mechanism, the main shaft body is slidably disposed on the surface of the air-blocking main body near the centering shaft, and the driving main shaft also includes a main shaft limiting part, which protrudes from the outer peripheral surface of the main shaft body.

[0013] The above-mentioned air-blocking moving contact mechanism includes a first air-blocking connecting part, a second air-blocking connecting part, and an elastic air-blocking connecting part connected between the first air-blocking connecting part and the second air-blocking connecting part. The first air-blocking connecting part and the second air-blocking connecting part are arranged at a preset angle and are respectively connected to the drive spindle and the moving contact. The elastic air-blocking connecting part has elastic force in the circumferential direction of the centering shaft.

[0014] On the other hand, this application embodiment also provides a switching device, which includes the above-mentioned gas-blocking moving contact mechanism. The switching device also includes a housing, inside which there is a contact receiving portion, a grid receiving portion, and a gas-blocking protrusion disposed between the contact receiving portion and the grid receiving portion. At least a portion of the gas-blocking moving contact mechanism is disposed in the contact receiving portion, and the gas-blocking member of the gas-blocking moving contact mechanism abuts and cooperates with the gas-blocking protrusion. A stationary contact is disposed in the grid receiving portion, and the stationary contact has a stationary contact point, which is positioned opposite to the moving contact point of the gas-blocking moving contact mechanism.

[0015] The air-blocking moving contact mechanism of this application includes a centering shaft, a drive assembly, a moving contact, and an air-blocking element. The drive assembly is configured to be connected to an external drive mechanism, and the drive assembly is connected to the moving contact. Under the drive of the external drive mechanism, the drive assembly can drive the moving contact to rotate around the centering shaft.

[0016] The moving contact passes through the drive hole of the gas-blocking body and can drive the gas-blocking body to move. Both the moving contact and the gas-blocking connection of the gas-blocking component can be rotatably mounted on the centering shaft. Therefore, the moving contact can drive the entire gas-blocking component to rotate around the centering shaft. When there is gas and electric arc at the moving contact point that passes through the drive hole, the gas-blocking body can block the gas and electric arc, preventing the gas and electric arc from continuing to move towards the centering shaft, reducing the probability of back-side breakdown, enabling the switchgear to effectively extinguish the arc, and improving the overall breaking capacity of the switchgear. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the air-blocking moving contact mechanism according to an embodiment of this application;

[0019] Figure 2 This is a cross-sectional view of the air-blocking moving contact mechanism according to an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the open state of the switching device according to an embodiment of this application;

[0021] Figure 4 This is a schematic diagram of the closing contact state of the switching device in an embodiment of this application;

[0022] Figure 5 This is a schematic diagram of the closing overtravel state of the switching device in an embodiment of this application.

[0023] Explanation of icon numbers:

[0024] 100. Gas-blocking moving contact mechanism; 200. Housing; 201. Contact receiving part; 202. Grid receiving part; 203. Gas-blocking protrusion; 300. Stationary contact; 301. Stationary contact point; 400. Arc-extinguishing chamber;

[0025] 1. Centering pivot;

[0026] 2. Drive assembly; 21. Drive spindle; 211. Spindle body; 212. Spindle connecting part; 213. Spindle limiting part; 214. Drive rod; 22. Drive connector; 221. First air stop connecting part; 222. Second air stop connecting part; 223. Elastic air stop connecting part;

[0027] 3. Moving contact; 31. Moving contact point;

[0028] 4. Air baffle; 41. Air baffle connection; 42. Air baffle body; 421. Drive hole. Detailed Implementation

[0029] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0030] like Figures 1 to 5 As shown, this application embodiment provides a gas-blocking moving contact mechanism, which includes a centering shaft 1; a drive assembly 2 configured to be connected to an external drive mechanism; a moving contact 3 rotatably mounted on the centering shaft 1 and connected to the drive assembly 2, the drive assembly 2 being used to drive the moving contact 3 to rotate around the centering shaft 1, the moving contact 3 having a moving contact point 31; and a gas-blocking member 4, including a gas-blocking connecting part 41 and a gas-blocking main body 42, one end of the gas-blocking connecting part 41 being rotatably mounted on the centering shaft 1, and the other end being connected to the gas-blocking main body 42, the gas-blocking main body 42 having a plate-like structure spaced apart from the centering shaft 1, the gas-blocking main body 42 having a through-hole 421, the moving contact 3 passing through the drive hole 421, and the moving contact point 31 extending out of the drive hole 421 in a direction away from the centering shaft 1.

[0031] In this embodiment, the gas-blocking moving contact mechanism 100 is installed entirely within the housing 200 of the switchgear. The housing 200 also contains a stationary contact 300 and an arc-extinguishing chamber 400. The stationary contact 300 is located between the gas-blocking moving contact mechanism 100 and the arc-extinguishing chamber 400, and the stationary contact 300 can cooperate with the moving contact 31 of the moving contact 3 to realize the opening and closing of the switchgear.

[0032] In specific implementation, the air-blocking moving contact mechanism of this application includes a centering shaft 1, a drive assembly 2, a moving contact 3 and an air-blocking component 4. The drive assembly 2 is configured to be connected to an external drive mechanism, and the drive assembly 2 is connected to the moving contact 3. Under the drive of the external drive mechanism, the drive assembly 2 can drive the moving contact 3 to rotate around the centering shaft 1.

[0033] The moving contact 3 passes through the drive hole 421 of the gas-blocking main body 42, which can drive the gas-blocking main body 42 to move. Both the moving contact 3 and the gas-blocking connection part 41 of the gas-blocking component 4 can be rotatably mounted on the centering shaft 1. Therefore, the moving contact 3 can drive the gas-blocking component 4 to rotate around the centering shaft 1. When there is gas and electric arc at the moving contact 31 that passes through the drive hole 421, the gas-blocking main body 42 can block the gas and electric arc, preventing the gas and electric arc from continuing to move towards the centering shaft 1, reducing the probability of back-side breakdown, and allowing most of the electric arc to remain in the arc-extinguishing chamber of the switchgear. The switchgear can effectively extinguish the arc and improve the overall breaking capacity of the switchgear.

[0034] The linkage between the moving contact 3 and the gas-blocking component 4 in this embodiment enables the gas-blocking main body 42 to follow the movement. When the moving contact 3 rotates to any angle or position, the gas-blocking main body 42 can block the arc at the moving contact 31, allowing the arc to remain in the arc-extinguishing chamber 400 for arc extinguishing, thus improving the arc extinguishing capability of the switching device.

[0035] like Figure 1 and Figure 2 As shown in the embodiment of this application, the gas-blocking moving contact mechanism has gas-blocking main body 42 connected to gas-blocking connecting part 41 at both ends in the axial direction. The gas-blocking connecting part 41 is provided with a plate-like structure, and the width of the gas-blocking connecting part 41 increases along the direction from the centering shaft 1 to the gas-blocking main body 42.

[0036] It should be noted that the axial, circumferential and radial directions of the embodiments of this application are all based on the centering shaft 1.

[0037] In specific implementation, the gas-blocking main body 42 is connected to plate-shaped gas-blocking connecting parts 41 at both ends in the axial direction, so that the two gas-blocking connecting parts 41 and the gas-blocking main body 42 together form a semi-enclosed structure for the centering shaft 1, the drive assembly 2 and the moving contact 3. It can block gas not only at the gas-blocking main body 42, but also at the gas-blocking connecting parts 41 at both ends in the axial direction, further improving the gas-blocking effect, enabling the switchgear to effectively extinguish the arc, and further improving the overall breaking capacity of the switchgear.

[0038] Along the direction from the centering shaft 1 to the air-blocking main body 42, the width of the air-blocking connecting part 41 increases progressively, so that the air-blocking main body 42, where the amount of gas and electric arc is relatively large, can have a wider width to ensure the air-blocking effect at both ends of the axial direction; and the part of the air-blocking main body 42 near the centering shaft 1 has a smaller width, which can avoid positional interference with the drive component 2 and the moving contact 3, ensuring that the air-blocking component 4 can rotate into position to block the air, thereby ensuring the air-blocking effect.

[0039] like Figure 1 and Figure 2 As shown in the embodiment of this application, the gas-blocking moving contact mechanism has a gas-blocking main body 42 with an open cylindrical structure, and the rotation center of the gas-blocking main body 42 is arranged to coincide with the centering shaft 1.

[0040] In practical implementation, the gas-blocking main body 42 has an open cylindrical structure. When it rotates around the centering shaft 1, its overall motion trajectory forms an arc shape centered on the centering shaft 1. This arc-shaped motion trajectory facilitates the synchronous movement of the gas-blocking main body 42 and the moving contact 3, and also facilitates sliding cooperation with the drive assembly 2, preventing interference between the gas-blocking component 4 and the drive assembly 2 during rotation. Furthermore, the open cylindrical structure of the gas-blocking main body 42 facilitates contact with the wall of the switchgear housing 200, thereby improving the sealing effect and further enhancing the gas-blocking effect.

[0041] In some alternative embodiments, the air-blocking body 42 can be configured as a flat plate structure or a plate-like structure with multiple bends connected, both of which can provide an air-blocking effect.

[0042] like Figure 1 and Figure 2 As shown in the embodiment of this application, the air-blocking moving contact mechanism includes a drive assembly 2 comprising a drive spindle 21 and a drive connector 22. The drive spindle 21 is rotatably mounted on the centering shaft 1 and connected to an external drive mechanism. The drive connector 22 is connected between the drive spindle 21 and the moving contact 3. The drive spindle 21 drives the moving contact 3 to rotate through the drive connector 22.

[0043] In specific implementation, the drive spindle 21 is rotatably mounted on the centering shaft 1 and driven by an external drive mechanism. The rotation of the drive spindle 21 facilitates the joint rotation of the moving contact 3. Furthermore, the drive spindle 21, the moving contact 3, and the air baffle 4 can all rotate around the centering shaft 1 as the rotation center. This ensures that when the drive spindle 21 drives the moving contact 3 and the air baffle 4 to rotate together, there will be no action conflict that could lead to jamming. This guarantees the overall stability of the switching device's opening and closing, as well as the air baffle stability of the air baffle 4.

[0044] The drive connector 22 is connected between the drive spindle 21 and the moving contact 3. When the drive spindle 21 rotates, the additional drive connector 22 makes it easier to drive the moving contact 3 to rotate, thereby further avoiding the occurrence of jamming.

[0045] Specifically, the drive assembly 2 also includes drive rods 214. Both sides of the drive spindle 21 are connected to drive rods 214 in the axial direction. The extension direction of the drive rods 214 is parallel to the axial direction. The drive spindle 21 is connected to the external drive mechanism through the drive rods 214. The fact that both ends of the drive spindle 21 are provided with drive rods 214 can ensure that the external drive mechanism can drive the drive spindle 21 stably, so that the drive spindle 21 can achieve stable rotation, thereby improving the stability of the opening and closing of the switchgear and the air blocking of the air blocking component 4.

[0046] like Figure 1 and Figure 2 As shown in the embodiment of this application, the air-blocking moving contact mechanism includes a drive spindle 21 comprising a spindle body 211 and a spindle connecting part 212. The spindle body 211 has an open cylindrical structure, and the spindle connecting part 212 has a plate-like structure and is vertically connected to the inner circumferential surface of the spindle body 211. The spindle connecting part 212 is sleeved on the centering shaft 1 and rotatably connected to the centering shaft 1.

[0047] In specific implementation, the main shaft body 211 of the drive spindle 2 has an open cylindrical structure, which is adapted to the air-blocking main body 42, which also has an open cylindrical structure. So when both the main shaft body 211 and the air-blocking main body 42 rotate, there will be no action interference between them. Both have openings and can be arranged in the opening of the other, so that the main shaft body 211 and the air-blocking main body 42 will not conflict in position when installed on the centering shaft 1. This allows both to be arranged around the centering shaft 1, reducing the overall volume of the air-blocking moving contact mechanism 100 and making it easier to arrange in the switchgear.

[0048] The spindle connecting part 212 is connected to the inner circumferential surface of the spindle body part 211. The spindle connecting part 212 is sleeved on the centering shaft 1 and rotates in contact with the centering shaft 1, so that the spindle body part 211 can be rotatably connected to the centering shaft 1 through the spindle connecting part 212. Moreover, the spindle connecting part 212 has a plate-like structure and is perpendicularly connected to the inner circumferential surface of the spindle body part 211. This arrangement facilitates the spindle connecting part 212 to drive the spindle body part 211 to rotate around the centering shaft 1, reducing the probability of jamming.

[0049] Specifically, the main shaft connecting part 212 has a circular plate-like structure. This shape facilitates relative sliding between the main shaft connecting part 212 and the inner surface of the air-blocking main body 42 when the main shaft 21 rotates, avoiding interference. Furthermore, the main shaft connecting part 212 is entirely located within the opening of the cylindrical structure of the air-blocking main body 42, making efficient use of space and further reducing the overall volume of the air-blocking moving contact mechanism.

[0050] like Figure 1 and Figure 2As shown in the embodiment of this application, the air-blocking moving contact mechanism includes a drive spindle 21 comprising at least two spindle connecting parts 212, which are spaced apart axially on the centering shaft 1 and are evenly disposed between the two air-blocking connecting parts 41.

[0051] In specific implementation, at least two spindle connecting parts 212 of the drive spindle 21 are spaced apart on the axial direction of the centering shaft 1 and are evenly located between the two air-blocking connecting parts 41. The two air-blocking connecting parts 41 can limit the at least two spindle connecting parts 212 in the axial direction, thereby achieving the limiting effect on the drive spindle 21 in the axial direction, avoiding axial movement of the drive spindle 21 during rotation, which would affect the driving effect on the moving contact 3, and ensuring the stability of the opening and closing of the switchgear and the air blocking of the air-blocking component 4.

[0052] like Figure 1 and Figure 2 As shown in the embodiment of this application, the air-blocking moving contact mechanism has two ends of the drive connector 22 connected to the main shaft connection 212 and the moving contact 3, respectively.

[0053] In specific implementation, one end of the drive connector 22 is connected to the side perpendicular to the axial direction of the main shaft connection 212, and the other end is connected to the side perpendicular to the axial direction of the moving contact 3. This connection method has a large connection area and the connection surface is flat, which facilitates fixing and connection, so that the drive connector and the moving contact 3 and the drive main shaft 21 can achieve a stable transmission effect, ensuring the stability of the opening and closing of the switch and the air blocking component 4.

[0054] like Figure 1 and Figure 2 As shown in the embodiment of this application, the air-blocking moving contact mechanism has a main shaft body 211 slidably disposed on the surface of the air-blocking main body 42 near the centering shaft 1. The driving main shaft 21 also includes a main shaft limiting part 213, which protrudes from the outer peripheral surface of the main shaft body 211.

[0055] In specific implementation, the main shaft body 211 is slidably disposed on the surface of the air-blocking body 42 near the centering shaft 1. When the main shaft body 211 and the air-blocking body 42 move together, they will not interfere with each other. On this basis, the sliding contact arrangement can further improve the sealing between the two. The gap between the two is small, and they can always stay in contact when they move together, thereby preventing gas or electric arc from moving in the direction of the centering shaft 1.

[0056] The drive spindle 21 also includes a spindle limiting part 213, which protrudes from the outer peripheral surface of the spindle body 211. The spindle limiting part 213 can abut against the edge of the air-blocking body 42 in the circumferential direction, thereby limiting the entire drive spindle 21 and preventing the drive spindle 21 from moving completely into the opening of the air-blocking body 42. Furthermore, the spindle limiting part 213 can form an arc-shaped structure with the air-blocking body 42 with a constant radius, thereby working together with the air-blocking body 42 to achieve the air-blocking effect, increasing the air-blocking range and further improving the air-blocking effect.

[0057] like Figure 1 and Figure 2 As shown in the embodiment of this application, the air-blocking moving contact mechanism includes a drive connector 22 comprising a first air-blocking connecting part 221, a second air-blocking connecting part 222, and an elastic air-blocking connecting part 223 connected between the first air-blocking connecting part 221 and the second air-blocking connecting part 222. The first air-blocking connecting part 221 and the second air-blocking connecting part 222 are arranged at a preset angle and are respectively connected to the drive spindle 21 and the moving contact 3. The elastic air-blocking connecting part 223 has an elastic force in the circumferential direction of the centering shaft 1.

[0058] In specific implementation, both the first air-blocking connection 221 and the second air-blocking connection 222 are rod-shaped structures, facilitating fixed connection with the axially perpendicular side of the main shaft connection 212 of the drive main shaft 21 and the axially perpendicular side of the moving contact 3, respectively. The first air-blocking connection 221 and the second air-blocking connection 222 are connected by an elastic air-blocking connection 223 with circumferential elastic force. When the force between the drive main shaft 21 and the moving contact 3 is small, the elastic force of the elastic air-blocking connection 223 can maintain the joint movement of the drive main shaft 21 and the moving contact 3. When the force between the drive main shaft 21 and the moving contact 3 is large, the elastic air-blocking connection 223 is compressed to achieve overtravel between the drive main shaft 21 and the moving contact 3.

[0059] like Figures 3 to 5As shown in the illustration, this application also provides a switching device, which includes the aforementioned gas-blocking moving contact mechanism 100. The switching device further includes a housing 200, which has a contact receiving portion 201, a grid receiving portion 202, and a gas-blocking protrusion 203 disposed between the contact receiving portion 201 and the grid receiving portion 202. At least a portion of the gas-blocking moving contact mechanism 100 is disposed within the contact receiving portion 201, and the gas-blocking member 4 of the gas-blocking moving contact mechanism 100 abuts against the gas-blocking protrusion 203. A stationary contact 300 is disposed within the grid receiving portion 202, and the stationary contact 300 has a stationary contact point 301, which is positioned opposite to the moving contact point 31 of the gas-blocking moving contact mechanism 100. An arc-extinguishing chamber 400 is also provided in the grid receiving portion 202, which can extinguish the arc generated when the stationary contact 300 and the moving contact 3 are disconnected.

[0060] In practical implementation, the gas-blocking member 4 of the gas-blocking moving contact mechanism 100 can abut against the gas-blocking protrusion 203, thereby separating the contact receiving portion 201 from the grid receiving portion 202. This prevents gas and arc from the grid receiving portion 202 from entering the contact receiving portion 201, thus avoiding damage to the mechanism inside the contact receiving portion 201 and causing back-end breakdown. Therefore, the cooperation between the gas-blocking protrusion 203 and the gas-blocking moving contact mechanism 100 improves the arc-extinguishing effect and breaking capacity of the switching device.

[0061] Specifically, air-blocking protrusions 203 are provided on both sides of the moving contact 3, and the two air-blocking protrusions 203 are arranged circumferentially along the centering shaft 1, so that together with the air-blocking component 4 and the drive assembly 2, they can achieve the effect of sealing and blocking air, further improving the arc extinguishing effect and breaking capacity of the switchgear.

[0062] like Figures 3 to 5 As shown, during the switching process of a switching device, there are three states: open, closed contact, and closed overtravel. Figure 3 As shown, this is the open state of the switchgear. In the open state, the air-blocking main body 42 of the air-blocking member 4 and the main shaft limiting part 213 of the drive assembly 2 can respectively contact the two air-blocking protrusions 203, and the two abut against each other to achieve a complete sealing effect; as shown Figure 4 As shown, this is the closed contact state of the switchgear. At this time, the moving contact 3 and the stationary contact 300 are initially in contact. The air-blocking body 42 and the main shaft limiting part 213 are still in contact. However, under the rotation of the air-blocking member 4 and the drive assembly 2, both ends of the air-blocking body 42 contact the two air-blocking protrusions 203 respectively. At this time, the air-blocking body 42 alone can achieve a complete sealing effect. Figure 5As shown, this is the overtravel state of the switchgear. At this time, the moving contact 3 and the stationary contact 300 are in an overtravel state. Due to the limiting effect of the stationary contact 300, the moving contact 3 no longer rotates, while the drive shaft 21 of the drive assembly 2 continues to rotate, causing the shaft limiting part 213 to separate from the air-blocking body part 42. Since the air-blocking body part 42 does not rotate, both ends of the air-blocking body part 42 remain in contact with the two air-blocking protrusions 203, still achieving a complete sealing effect. Therefore, the air-blocking moving contact mechanism and switchgear of this application embodiment can achieve a sealing effect on the grid receiving part 202 in the open state, the closed contact state, and the overtravel state of the switchgear, ensuring the arc-extinguishing effect and breaking capacity of the switchgear.

[0063] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0064] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A gas-blocking moving contact mechanism, characterized in that, include: Centering pivot (1); The drive component (2) is configured to connect to an external drive mechanism; A moving contact (3) is rotatably mounted on the centering shaft (1) and connected to the drive assembly (2). The drive assembly (2) is used to drive the moving contact (3) to rotate around the centering shaft (1). The moving contact (3) has a moving contact point (31). The air baffle (4) includes an air baffle connecting part (41) and an air baffle main body (42). One end of the air baffle connecting part (41) is rotatably mounted on the centering shaft (1), and the other end is connected to the air baffle main body (42). The air baffle main body (42) has a plate-shaped structure spaced apart from the centering shaft (1). The air baffle main body (42) has a through drive hole (421). The moving contact (3) passes through the drive hole (421), and the moving contact (31) extends out of the drive hole (421) in a direction away from the centering shaft (1).

2. The air-blocking moving contact mechanism according to claim 1, characterized in that, The air-blocking main body (42) is connected to the air-blocking connecting part (41) at both ends in the axial direction. The air-blocking connecting part (41) is plate-shaped and its width increases along the direction from the centering shaft (1) to the air-blocking main body (42).

3. The air-blocking moving contact mechanism according to claim 1 or 2, characterized in that, The air-blocking main body (42) has an open cylindrical structure, and the rotation center of the air-blocking main body (42) coincides with the centering shaft (1).

4. The air-blocking moving contact mechanism according to claim 2, characterized in that, The drive assembly (2) includes a drive spindle (21) and a drive connector (22). The drive spindle (21) is rotatably mounted on the centering shaft (1) and connected to the external drive mechanism. The drive connector (22) is connected between the drive spindle (21) and the moving contact (3). The drive spindle (21) drives the moving contact (3) to rotate through the drive connector (22).

5. The air-blocking moving contact mechanism according to claim 4, characterized in that, The drive spindle (21) includes a spindle body (211) and a spindle connecting part (212). The spindle body (211) has an open cylindrical structure. The spindle connecting part (212) has a plate-like structure and is vertically connected to the inner circumferential surface of the spindle body (211). The spindle connecting part (212) is sleeved on the centering shaft (1) and rotatably connected to the centering shaft (1).

6. The air-blocking moving contact mechanism according to claim 5, characterized in that, The drive spindle (21) includes at least two spindle connecting parts (212), which are spaced apart on the axial direction of the centering shaft (1) and are both located between the two air-blocking connecting parts (41).

7. The air-blocking moving contact mechanism according to claim 5, characterized in that, The two ends of the drive connector (22) are respectively connected to the spindle connection part (212) and the moving contact (3).

8. The air-blocking moving contact mechanism according to claim 5, characterized in that, The main spindle body (211) is slidably disposed on the surface of the air baffle body (42) near the centering shaft (1). The drive spindle (21) also includes a spindle limiting part (213), which protrudes from the outer peripheral surface of the main spindle body (211).

9. The air-blocking moving contact mechanism according to claim 4, characterized in that, The drive connector (22) includes a first air-blocking connector (221), a second air-blocking connector (222), and an elastic air-blocking connector (223) connected between the first air-blocking connector (221) and the second air-blocking connector (222). The first air-blocking connector (221) and the second air-blocking connector (222) are arranged at a preset angle and are respectively connected to the drive spindle (21) and the moving contact (3). The elastic air-blocking connector (223) has an elastic force in the circumferential direction of the centering shaft (1).

10. A switching device, characterized in that, Including the gas-stopping moving contact mechanism (100) as described in any one of claims 1 to 9, the switching device further includes: The housing (200) has a contact receiving portion (201), a grid receiving portion (202) and an air-blocking protrusion (203) disposed between the contact receiving portion (201) and the grid receiving portion (202). At least part of the air-blocking movable contact mechanism (100) is disposed in the contact receiving portion (201), and the air-blocking member (4) of the air-blocking movable contact mechanism (100) abuts against the air-blocking protrusion (203). A stationary contact (300) is disposed within the grid receiving portion (202). The stationary contact (300) has a stationary contact point (301), which is positioned opposite to the moving contact point (31) of the gas-blocking moving contact mechanism (100).

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