Switching device
By designing arc-blocking components in conjunction with linkage rods and limit assemblies in the switching electrical appliances, the balance between arc-extinguishing efficiency and structural compactness is solved, achieving miniaturization and cost reduction, and improving the reliability and service life of the electrical appliances.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- DELIXI ELECTRIC
- Filing Date
- 2026-03-25
- Publication Date
- 2026-05-15
AI Technical Summary
Existing switching devices struggle to balance arc extinguishing efficiency and structural compactness, resulting in large size and high manufacturing costs.
By designing an arc-blocking component that works in conjunction with a linkage rod and a limit assembly in the switching device, the moving contact drives the arc-blocking component to move at different positions, reducing the arc dwell time without increasing the opening distance. Combined with the insulation structure, this improves arc-extinguishing efficiency and structural compactness.
While ensuring arc extinguishing efficiency, the size and manufacturing cost of the switching device are reduced, the possibility of arc erosion is increased, the service life is extended, and the reliability and safety of the device are guaranteed.
Smart Images
Figure CN122051090A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of low-voltage electrical technology, and more particularly to a switching device. Background Technology
[0002] A switching device is an electrical component that protects a circuit. Switching devices can include circuit breakers, contactors, disconnectors, etc. Taking a circuit breaker as an example, when an overload, short circuit, or other fault occurs in the circuit, the switching device can switch from the closed state to the open state to disconnect the circuit, thereby reducing the possibility of the fault in the circuit escalating further.
[0003] A switching device includes a moving contact and a stationary contact that cooperate with each other. The moving contact is movable relative to the stationary contact to adjust the contact state between the moving contact assembly and the stationary contact assembly, thereby adjusting the operating state of the switching device and providing protection for the circuit. During the process of switching the switching device from the closed state to the open state, an electric arc is generated between the moving contact and the stationary contact.
[0004] Based on the existing structure of the switchgear, increasing the opening distance of the switchgear can reduce the time the arc remains between the moving and stationary contacts and accelerate the arc extinguishing efficiency. However, this structure will result in a larger size of the switchgear and increase its manufacturing cost. Summary of the Invention
[0005] This application provides a switching device that, while ensuring arc extinguishing efficiency, allows for a more compact internal structure, reducing the size and manufacturing cost of the switching device.
[0006] In a first aspect, this application provides a switching device. The switching device includes a housing, a stationary contact, a moving contact, an arc-blocking member, and a linkage rod. The housing includes a bottom wall. The stationary contact is fixedly mounted to the bottom wall. The moving contact is rotatably mounted to the housing and can rotate to a position contacting the stationary contact. The arc-blocking member includes a first position, a second position, and an arc-blocking portion spaced apart. At the first position, the arc-blocking member is rotatably connected to the moving contact via the linkage rod, and at the second position, the arc-blocking member is movably connected to the housing via a limiting component.
[0007] During the switching process from the open state to the closed state, the moving contact drives the linkage rod to move closer to the bottom wall, and the linkage rod, in conjunction with the limit component, moves the arc-blocking component between the moving contact and the bottom wall. During the switching process from the closed state to the open state, the moving contact drives the linkage rod to move away from the bottom wall, and the linkage rod, in conjunction with the limit component, moves the arc-blocking component away from the bottom wall. When the switching device is in the open state, the arc-blocking part is located between the stationary contact and the moving contact.
[0008] In this example, the housing provides installation space for the stationary contact, moving contact, and arc-blocking component. By adjusting the contact state between the moving and stationary contacts, the switchgear can switch between the closed and open states. The first position of the arc-blocking component is connected to the moving contact via a linkage rod. During the switching process between the open and closed states, the moving contact can drive the arc-blocking component to move via the linkage rod. When the switchgear is in the closed state, the moving contact can move the arc-blocking component between the moving contact and the bottom wall, avoiding the need for installation space for the arc-blocking component in the space outside the bottom wall and the moving contact. This makes the internal structure of the switchgear more compact, which is conducive to the miniaturization of the switchgear and reduces its manufacturing cost.
[0009] Compared to existing technologies that reduce the duration of arc stagnation between the moving and stationary contacts by increasing the opening distance of the switchgear, in this application example, when the switchgear is in the open state, the arc-blocking part of the arc-blocking component is located between the moving and stationary contacts. This reduces the duration of arc stagnation between the moving and stationary contacts without increasing the opening distance of the switchgear, thereby improving arc extinguishing efficiency, reducing the possibility of arc erosion of the moving and stationary contacts, extending the service life of the switchgear, and reducing the operating cost of the switchgear.
[0010] In some possible implementations, the moving contact includes a moving rod and a moving contact point. The moving contact point can contact the stationary contact. When the switchgear is in the closed state, the projection of the arc-blocking member in the direction perpendicular to the bottom wall is smaller than the projection of the moving rod in the direction of the moving contact point.
[0011] In this application example, when the switchgear is in the closed state, the projection of the arc-blocking component in the direction perpendicular to the bottom wall is smaller than the projection of the moving contact rod in the direction of the moving contact. This can reduce the possibility of unreliable contact between the moving contact and the stationary contact due to the arc-blocking component.
[0012] Furthermore, when the switchgear is in the closed state, the projection of the arc-blocking component in the direction perpendicular to the bottom wall is smaller than the projection of the moving contact rod in the direction of the moving contact. This allows the arc-blocking component to be located between the moving contact rod and the bottom wall, avoiding the need to provide installation space for the arc-blocking component in other locations inside the switchgear. This makes the internal structure of the switchgear more compact, which is conducive to the miniaturization of the switchgear and can reduce the manufacturing cost of the switchgear.
[0013] In some possible implementations, the limiting assembly includes a limiting rod, a connecting protrusion on the bottom wall, the connecting protrusion being located on the side of the stationary contact facing the rotation center of the moving contact, a first end of the limiting rod being rotatably connected to a second position, and a second end of the limiting rod being rotatably connected to the connecting protrusion.
[0014] In this example, one end of the linkage rod is connected to the first position of the arc-isolating component, and the first end of the limiting rod is rotatably connected to the second position of the arc-isolating component. Therefore, the limiting rod, in conjunction with the linkage rod, can provide force to the arc-isolating component from different positions. Furthermore, since the other end of the linkage rod is connected to the moving contact, and the second end of the limiting rod is connected to the connecting protrusion located on the bottom wall, with the arc-isolating component situated between the bottom wall and the moving contact, the directions of the force applied by the linkage rod to the arc-isolating component at the first position and the limiting rod at the second position are different. This reduces the possibility of the arc-isolating component flipping during rotation, ensuring the reliability of the switching device's operation.
[0015] In some possible implementations, the limit rod and the linkage rod form a linkage angle, and the opening of the linkage angle is set away from the rotation center of the moving contact, with the linkage angle being less than 180 degrees.
[0016] In this application example, the linkage angle formed by the limit rod and the linkage rod is set with the opening away from the rotation center of the moving contact. By setting the linkage angle to be less than 180 degrees, it is possible to avoid the situation that occurs during the closing process of the switchgear, where the linkage angle is greater than 180 degrees, causing the linkage rod to be stuck between the moving contact and the bottom wall, thus preventing the moving contact from reliably contacting the stationary contact, thereby ensuring the reliability of the switchgear.
[0017] In some possible implementations, the limiting component also includes a limiting protrusion located on the side of the connection position facing the stationary contact, which is used to limit the rotation angle of the limiting rod.
[0018] In this example, by setting a limiting protrusion on the side of the connection position facing the stationary contact, if the limiting rod tends to rotate towards the stationary contact during the switching process of the switchgear from the closed state to the open state, the limiting rod will abut against the limiting protrusion. This prevents the arc-blocking component from flipping towards the stationary contact due to the limiting rod rotating towards the stationary contact, thus avoiding the arc-blocking component getting stuck between the moving contact and the bottom wall. This ensures the reliability of the arc-blocking component and, consequently, the performance of the switchgear.
[0019] In some possible implementations, the switching device also includes an insulating structure, at least partially disposed between the limit rod and the stationary contact.
[0020] In this application example, by setting at least part of the insulation structure between the limit rod and the stationary contact, the creepage distance between the limit rod and the stationary contact can be increased, reducing the possibility of voltage breakdown between the limit rod and the stationary contact during the use of the switchgear, and ensuring the performance of the switchgear.
[0021] In some possible implementations, the insulation structure includes an insulating plate and / or an insulating layer. The insulating plate is disposed between the stationary contact and the limiting rod. The insulating layer is sleeved on the outside of the limiting rod.
[0022] In this application example, whether an insulating plate is installed between the stationary contact and the limit rod, or an insulating layer is sleeved on the outside of the limit rod, the creepage distance between the limit rod and the stationary contact can be increased, reducing the possibility of voltage breakdown between the limit rod and the stationary contact during the use of the switchgear, and ensuring the performance of the switchgear.
[0023] In some possible implementations, the limiting component includes a first limiting structure and a second limiting structure that cooperate with each other. The first limiting structure is located on the side wall of the housing, and the second limiting structure is located at the second position of the arc-blocking member. The second limiting structure is slidable relative to the first limiting structure.
[0024] In this application example, with the linkage rod connected to the first position of the arc-blocking component, the second limiting structure is slidable relative to the first limiting structure. Since the first limiting structure is located on the side wall of the housing and the second limiting structure is located at the second position of the arc-blocking component, the linkage between the second limiting structure and the first limiting structure can provide different forces to the arc-blocking component from different positions, reducing the possibility of the arc-blocking component flipping during rotation and ensuring the reliability of the switchgear operation.
[0025] In some possible implementations, the arc-blocking component further includes a fixed section and a connecting section, one end of the connecting section is connected to the fixed section, the other end of the connecting section is connected to the arc-blocking part, and the first position and the second position are located on the fixed section.
[0026] In this application example, the connecting segment can connect the fixed segment and the arc-blocking part. The fixed segment and the connecting segment cooperate with the arc-blocking part to form an arc-blocking component. The first position and the second position are located on the fixed segment, providing an installation carrier for the linkage rod and the limiting component.
[0027] In some possible implementations, when the switching device is in the closed state, the fixed section and the arc-blocking section are located on different planes along the direction perpendicular to the bottom wall.
[0028] In this example, when the switchgear is in the closed state, the fixed section and the arc-blocking part are located on different planes along the direction perpendicular to the bottom wall. While ensuring that the arc-blocking part does not affect the reliability of the switchgear, it enables the arc-blocking part to be applicable to switchgear of different specifications, thus expanding the applicability of the arc-blocking part. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of a switching device provided as an example of this application.
[0030] Figure 2 This is a schematic diagram of the internal structure of a switching device in the open state, as provided as an example of this application.
[0031] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.
[0032] Figure 4 This is a schematic diagram of the internal structure of a switching device when it is in the closed state, as provided as an example of this application.
[0033] Figure 5 for Figure 4 A magnified view of a portion of point B in the middle.
[0034] Figure 6 This is a schematic diagram of the structure of an arc-blocking component provided as an example of this application.
[0035] Figure 7 This is a schematic diagram of a shell structure provided as an example of this application.
[0036] Figure 8 for Figure 7 Sectional view at point AA.
[0037] Figure 9 for Figure 8 A magnified view of a portion of point C.
[0038] Explanation of reference numerals in the attached figures: 100. Switchgear; 110. Housing; 111. Mounting cavity; 112. Bottom wall; 113. Connecting protrusion; 114. Insulation structure; 120. Moving contact; 121. Moving contact point; 122. Moving contact rod; 123. Receiving groove; 124. Rotation center of moving contact; 130. Stationary contact; 140. Linkage rod; 150. Limiting assembly; 151. Limiting rod; 152. Limiting protrusion; 160. Arc blocking component; 161. Fixed section; 1611. First position; 1612. Second position; 162. Connecting section; 163. Arc blocking part; 170. Arc extinguishing assembly; LDJ. Linkage angle. Detailed Implementation
[0039] To make the purpose, technical solutions, and advantages of the examples in this application clearer, the technical solutions in the examples of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described examples are only a part of the examples in this application, not all of them. Based on the examples in this application, all other examples obtained by those skilled in the art without inventive effort are within the scope of protection of this application.
[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terms used herein in the description of the application are for the purpose of describing particular examples only and are not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the description, claims and drawings of this application are intended to cover non-exclusive inclusion.
[0041] In this document, the term "example" means that a particular feature, structure, or characteristic described in connection with the example can be included in at least one example of this application. The appearance of the phrase "example" in various places in the specification does not necessarily refer to the same example, nor is it a separate or alternative example mutually exclusive with other examples. It will be explicitly and implicitly understood by those skilled in the art that the examples described herein can be combined with other examples.
[0042] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist simultaneously, or B exists. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.
[0043] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the switching device of this application.
[0044] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.
[0045] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).
[0046] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by a partition, such as a connection fixed by screws, bolts, or other partitions; a physical connection can also be a detachable connection, such as a snap-fit or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0047] To enable those skilled in the art to better understand the present application, the switching device provided in the example of the present application will be clearly and completely described below with reference to the accompanying drawings.
[0048] For example, this application provides a switching device. Figure 1 This application provides a schematic diagram of the structure of a switching device. Figure 2 This application provides a schematic diagram of the internal structure of a switching device in the open state. Figure 3 for Figure 2 A magnified view of a portion of point A in the diagram. Figure 4 This application provides a schematic diagram of the internal structure of a switching device in the closed state. Figure 5 for Figure 4 A magnified view of a portion of point B in the diagram. Figure 6 This is a schematic diagram of the structure of an arc-blocking component provided as an example of this application.
[0049] Please refer to Figures 1-6 The switchgear 100 includes a housing 110, a stationary contact 130, a moving contact 120, an arc-blocking member 160, and a linkage rod 140. The housing 110 includes a bottom wall 112. The stationary contact 130 is fixedly mounted to the bottom wall 112. The moving contact 120 is rotatably mounted to the housing 110 and can rotate to a position contacting the stationary contact 130. The arc-blocking member 160 includes a first position 1611, a second position 1612, and an arc-blocking portion 163 spaced apart. The arc-blocking member 160 is rotatably connected to the moving contact 120 at the first position 1611 via the linkage rod 140, and at the second position 1612 is movably connected to the housing 110 via a limiting assembly 150.
[0050] Please refer to Figures 2-5 During the switching process of the switchgear 100 from the open state to the closed state, the moving contact 120 drives the linkage rod 140 to move closer to the bottom wall 112, and the linkage rod 140, in conjunction with the limit component 150, drives the arc-blocking component 160 to be located between the moving contact 120 and the bottom wall 112. During the switching process of the switchgear 100 from the closed state to the open state, the moving contact 120 drives the linkage rod 140 to move away from the bottom wall 112, and the linkage rod 140, in conjunction with the limit component 150, drives the arc-blocking component 160 to move away from the bottom wall 112. When the switchgear 100 is in the open state, the arc-blocking part 163 is located between the stationary contact 130 and the moving contact 120.
[0051] The switching device 100 can be a circuit breaker, a disconnecting switch, or other switches that can provide safety protection for the circuit. This application does not impose specific limitations on this example; this application only describes the disconnecting switch as a circuit breaker.
[0052] A circuit breaker can be a single-phase circuit breaker or a multi-phase circuit breaker. It also includes an operating mechanism and a protection mechanism. The protection mechanism can be at least one of a thermal protection mechanism and a magnetic protection mechanism, and the specific implementation of the protection mechanism is related to the specific specifications of the circuit breaker. In the event of a fault in the circuit, the fault current can trigger the corresponding protection mechanism to operate, thereby directly or indirectly causing the moving contact 120 and the stationary contact 130 in the circuit breaker to separate, switching the circuit breaker from the closed state to the open state, reducing the possibility of the fault spreading in the circuit, and providing safety assurance for the circuit.
[0053] The stationary contact 130 is fixedly installed to the bottom wall 112 of the housing 110. The number of stationary contacts 130 is equal to the number of poles of the circuit breaker, and each pole of the circuit breaker has a corresponding mounting cavity 111. The bottom wall 112 of each mounting cavity 111 is fixedly installed with a corresponding stationary contact 130. The number of moving contacts 120 is equal to the number of stationary contacts 130, and the moving contacts 120 are rotatably installed in the mounting cavity 111. When the moving contact 120 rotates to the position of contacting the stationary contact 130, the circuit breaker is in the closed state, and current flows through the circuit. When the moving contact 120 rotates to the position of separating from the stationary contact 130, the circuit breaker is in the open state, and there is no current in the circuit.
[0054] The arc-blocking component 160 is made of insulating material. The arc-blocking component 160 includes a first position 1611, a second position 1612, and an arc-blocking portion 163 spaced apart. At the first position 1611, the arc-blocking component 160 is rotatably connected to the moving contact 120 via a linkage rod 140. The linkage rod 140 can be movably connected to the moving contact 120 through a hole-shaft fit, a groove-and-protrusion fit, or other means. It is necessary to ensure that the linkage rod 140 can rotate relative to the moving contact 120 during the movement of the moving contact 120, in order to reduce the possibility that the linkage rod 140 restricts the rotation of the moving contact 120, thereby affecting the reliability of the circuit breaker. At the second position 1612, the arc-blocking component 160 is movably connected to the housing 110 via a limiting component 150. The limiting component 150 is specifically connected to the cavity sidewall of the corresponding mounting cavity 111. The limiting component 150 may include a rod-shaped structure; other structures are also possible, and this application example does not impose specific limitations on them.
[0055] The first position 1611 can be positioned closer to the arc-blocking part 163 than the second position 1612, or the second position can be positioned closer to the arc-blocking part 163 than the first position. As long as the first position 1611 and the second position 1612 are spaced apart, the linkage rod 140 and the limiting component 150 can provide force to the arc-blocking member 160 from different positions, thereby reducing the possibility of the arc-blocking member 160 flipping during the use of the switch appliance 100.
[0056] Please refer to Figures 2-5During the process of switching the switchgear 100 from the open state to the closed state, the moving contact 120 rotates toward the bottom wall 112. Since one end of the linkage rod 140 is in contact with the moving contact 120 and the other end of the linkage rod 140 is engaged with the arc-blocking member 160, and the arc-blocking member 160 is also connected to the housing 110 through the limiting component 150, the linkage rod 140 can drive the arc-blocking member 160 to rotate inside the housing 110 under the drive of the moving contact 120. The arc-blocking member 160 drives the structure connected to the arc-blocking member 160 in the limiting component 150 to move, so that the linkage rod 140 and the limiting component 150 can provide force to the arc-blocking member 160 from different positions, reducing the possibility of the arc-blocking member 160 flipping during use.
[0057] Please refer to Figure 3 When the switch 100 is in the closed state, the arc-blocking member 160 is located between the moving contact 120 and the bottom wall 112. At least one of the moving contact 120 and the bottom wall 112 is provided with a receiving groove 123, so that the arc-blocking member 160 can be located in the receiving groove 123, reducing the possibility that the arc-blocking member 160 located between the moving contact 120 and the bottom wall 112 will affect the reliable contact between the stationary contact 130 and the moving contact 120.
[0058] Please refer to Figures 2-5 During the process of switching the circuit breaker from the closed state to the open state, the moving contact 120 rotates away from the bottom wall 112. Driven by the moving contact 120, the position where the linkage rod 140 is connected to the moving contact 120 moves away from the bottom wall 112 first. Subsequently, the position where the linkage rod 140 is connected to the arc-blocking member 160 drives the arc-blocking member 160 to move away from the bottom wall 112. The arc-blocking member 160 drives the structure connected to the arc-blocking member 160 in the limit assembly 150 to move, so that the limit assembly 150 cooperates with the linkage rod 140 to limit the movement of the arc-blocking member 160.
[0059] In this example, the housing 110 provides installation space for structures such as the stationary contact 130, the moving contact 120, and the arc-blocking member 160. By adjusting the contact state between the moving contact 120 and the stationary contact 130, the switchgear 100 can switch between the closed and open states. The first position 1611 of the arc-blocking member 160 is connected to the moving contact 120 via a linkage rod 140. During the switching process between the open and closed states, the moving contact 120 can drive the arc-blocking member 160 to move via the linkage rod 140. When the switchgear 100 is in the closed state, the moving contact 120 can drive the arc-blocking member 160 to be located between the moving contact 120 and the bottom wall 112. This avoids providing installation space for the arc-blocking member 160 in the space outside the bottom wall 112 and the moving contact 120, making the internal structure of the switchgear 100 more compact, which is conducive to the miniaturization of the switchgear 100 and reduces the manufacturing cost of the switchgear 100.
[0060] Compared to existing technologies that reduce the duration of arc stagnation between the moving contact 120 and the stationary contact 130 by increasing the opening distance of the switchgear 100, in this application example, when the switchgear 100 is in the open state, the arc-blocking part 163 of the arc-blocking member 160 is located between the moving contact 120 and the stationary contact 130. Without increasing the opening distance of the switchgear 100, the duration of arc stagnation between the moving contact 120 and the stationary contact 130 can be reduced, thereby improving arc extinguishing efficiency, reducing the possibility of arc erosion of the moving contact 120 and the stationary contact 130, extending the service life of the switchgear 100, and reducing the operating cost of the switchgear 100.
[0061] Based on the switchgear 100 provided in the example above, please refer to... Figure 3 and Figure 4 The moving contact 120 includes a moving contact rod 122 and a moving contact 121. The moving contact 121 can contact the stationary contact 130. When the switch 100 is in the closed state, the size of the projection of the arc-blocking member 160 in the direction perpendicular to the bottom wall 112 towards the moving contact 121 is smaller than the size of the projection of the moving contact rod 122 in the direction towards the moving contact 121.
[0062] When the switchgear 100 is in the closed state, along the direction perpendicular to the bottom wall 112, that is, in the direction parallel to the stationary contact 130 towards the bottom wall 112, the projection of the arc-blocking member 160 towards the moving contact 121 is smaller than the projection of the moving contact rod 122 towards the moving contact 121. In other words, the projection of the arc-blocking member 160 along the length of the switchgear 100 is smaller than the projection of the moving contact rod 122 along the length of the switchgear 100. When the receiving groove 123 is provided on the moving contact 120, the receiving groove 123 is specifically provided on the side of the moving contact rod 122 facing the bottom wall 112.
[0063] The projection of the arc-blocking member 160 in the width direction of the switch 100 can fall within the projection range of the moving contact rod 122 along the direction perpendicular to the bottom wall 112, or it can exceed the projection range of the moving contact rod 122. This application example does not impose specific restrictions on this, as long as it is ensured that the arc-blocking member 160 will not affect the use of other structures inside the switch 100.
[0064] The stationary contact 130 includes a stationary contact point, and the moving contact 121 is capable of contacting the stationary contact point. When the switchgear 100 is in the open state, the arc-blocking portion 163 of the arc-blocking member 160 is located between the stationary contact 130 and the moving contact 120. Along the arrangement direction of the plurality of mounting cavities 111, that is, along the width direction of the switchgear 100, the larger dimension of the stationary contact and the moving contact 121 is smaller than the dimension of the arc-blocking portion 163, so as to ensure the reliability of the arc-blocking portion 163 in use.
[0065] In this application example, when the switch 100 is in the closed state, the projection of the arc-blocking member 160 in the direction perpendicular to the bottom wall 112 is smaller than the projection of the moving contact rod 122 in the direction toward the moving contact 121. This can reduce the possibility that the moving contact 121 and the stationary contact 130 will have unreliable contact due to the arc-blocking member 160.
[0066] Furthermore, when the switchgear 100 is in the closed state, the projection of the arc-blocking member 160 in the direction perpendicular to the bottom wall 112 is smaller than the projection of the moving contact rod 122 in the direction perpendicular to the moving contact 121. This allows the arc-blocking member 160 to be located between the moving contact rod 122 and the bottom wall 112, avoiding the need to provide installation space for the arc-blocking member 160 in other locations inside the switchgear 100. This makes the internal structure of the switchgear 100 more compact, which is beneficial for the miniaturization of the switchgear 100 and can reduce the manufacturing cost of the switchgear 100.
[0067] Based on the switchgear 100 provided in the example above, please refer to... Figure 6 The arc-blocking component 160 also includes a fixed section 161 and a connecting section 162. One end of the connecting section 162 is connected to the fixed section 161, and the other end of the connecting section 162 is connected to the arc-blocking part 163. The first position 1611 and the second position 1612 are located on the fixed section 161.
[0068] The fixed section 161, the connecting section 162, and the arc-blocking part 163 can cooperate to form a flat plate structure, or they can cooperate to form a folded plate structure. The fixed section 161, the connecting section 162, and the arc-blocking part 163 can be integrally formed or fixedly connected by welding or other methods. This application does not impose specific limitations on this.
[0069] In this application example, the connecting segment 162 can connect the fixed segment 161 and the arc-blocking part 163. The fixed segment 161 and the connecting segment 162 cooperate with the arc-blocking part 163 to form an arc-blocking component 160. The first position 1611 and the second position 1612 are located on the fixed segment 161 to provide an installation carrier for the linkage rod 140 and the limiting component 150.
[0070] Based on the switchgear 100 provided in the example above, please refer to... Figure 4 , Figure 5 and Figure 6 When the switch 100 is in the closed state, the fixed section 161 and the arc-blocking section 163 are located on different planes along the direction perpendicular to the bottom wall 112.
[0071] When the switchgear 100 is in the closed state, the arc-blocking member 160 is located between the moving contact 120 and the bottom wall 112. Along the direction perpendicular to the bottom wall 112, the fixed section 161 and the arc-blocking part 163 are located on different planes. Specifically, the arc-blocking part 163 can be set further away from the bottom wall 112 than the fixed section 161, or the arc-blocking part 163 can be set closer to the bottom wall 112 than the fixed section 161. As long as the arc-blocking member 160 does not affect the closing reliability of the switchgear 100, it is acceptable.
[0072] In this example, when the switch 100 is in the closed state, the fixed section 161 and the arc-blocking part 163 are located on different planes along the direction perpendicular to the bottom wall 112. While ensuring that the arc-blocking part 160 does not affect the reliability of the switch 100, the arc-blocking part 160 can be applied to switch 100s of different specifications, thus expanding the application range of the arc-blocking part 160.
[0073] The limit component 150 can be implemented in various ways. The following is a detailed description of the implementation methods of the limit component 150.
[0074] Among some possible implementations, Figure 7 A schematic diagram of a shell structure is provided as an example of this application. Figure 8 for Figure 7 Sectional view at point AA. Figure 9 for Figure 8 Please refer to the enlarged view of the area at point C. Figures 4-9 The limiting assembly 150 includes a limiting rod 151, and a connecting protrusion 113 is provided on the bottom wall 112. The connecting protrusion 113 is located on the side of the stationary contact 130 facing the rotation center 124 of the moving contact. The first end of the limiting rod 151 is rotatably connected to the second position 1612, and the second end of the limiting rod 151 is rotatably connected to the connecting position of the connecting protrusion 113.
[0075] The first end of the limiting rod 151 is rotatably connected to the second position 1612 of the arc-blocking member 160 through a hole-shaft engagement, a groove-protrusion engagement, or other means.
[0076] A connecting protrusion 113 is provided on the bottom wall 112. The connecting protrusion 113 can be a protruding column, a boss, or other structures. When the switchgear 100 is in the closed state, the arc-blocking member 160 can contact the side of the connecting protrusion 113 facing away from the base, or the arc-blocking member 160 can be spaced apart from the connecting protrusion 113. The connecting protrusion 113 is located on the side of the stationary contact 130 facing the rotation center 124 of the moving contact. Specifically, the connecting protrusion 113 can contact the stationary contact 130, or the connecting protrusion 113 can be spaced apart from the stationary contact 130. Along the length direction of the switchgear 100, the connection position is located in the middle of the connecting protrusion 113; this application example does not impose specific limitations on this.
[0077] In this example, one end of the linkage rod 140 is connected to the first position 1611 of the arc-isolating member 160, and the first end of the limiting rod 151 is rotatably connected to the second position 1612 of the arc-isolating member 160. Therefore, the limiting rod 151, in conjunction with the linkage rod 140, can provide force to the arc-isolating member 160 from different positions. Furthermore, since the other end of the linkage rod 140 is connected to the moving contact 120, and the second end of the limiting rod 151 is connected to the connecting protrusion 113, which is located on the bottom wall 112, and the arc-isolating member 160 is located between the bottom wall 112 and the moving contact 120, the directions of the force applied by the linkage rod 140 at the first position 1611 and the limiting rod 151 at the second position 1612 are different. This reduces the possibility of the arc-isolating member 160 flipping during rotation, ensuring the operational reliability of the switchgear 100.
[0078] Based on the switchgear 100 provided in the example above, please refer to... Figure 3 The limiting rod 151 and the linkage rod 140 form a linkage angle LDJ. The opening of the linkage angle LDJ is set away from the rotation center 124 of the moving contact, and the linkage angle LDJ is less than 180 degrees.
[0079] The switchgear 100 also includes an arc-extinguishing assembly 170. The arc-extinguishing assembly 170 has an arc-extinguishing cavity. The stationary contact 130 is installed in the arc-extinguishing cavity. The moving contact 120 and the end furthest from the rotation center 124 of the moving contact can contact or separate from the stationary contact 130 within the arc-extinguishing cavity. The arc-extinguishing assembly 170 performs arc-extinguishing treatment. The opening of the linkage angle LDJ is set away from the rotation center 124 of the moving contact. Since the direction in which the arc enters the arc-extinguishing cavity is away from the rotation center of the moving contact 120, the direction in which the arc enters the arc-extinguishing cavity is the arc-extinguishing direction. Therefore, the opening of the linkage angle LDJ is set towards the arc-extinguishing direction.
[0080] Regardless of whether the switchgear 100 is in the closed state, or during the switching process between the closed and open states, the linkage angle LDJ is always less than 180 degrees. Specifically, this can be achieved by installing an elastic element between the linkage rod 140 and the limit rod 151, with the elastic element connected to the middle of the two rods. This ensures that the linkage angle LDJ is less than 180 degrees. It is crucial that the installation of the elastic element does not affect the performance of the switchgear 100. Alternatively, other methods can be used to ensure that the linkage angle LDJ is less than 180 degrees.
[0081] In this example, the linkage angle LDJ formed by the limit rod 151 and the linkage rod 140 is set with its opening away from the rotation center 124 of the moving contact. By setting the linkage angle LDJ to be less than 180 degrees, it is possible to avoid the situation where the linkage angle LDJ rod is stuck between the moving contact 120 and the bottom wall 112 during the closing process of the switchgear 100 due to the linkage angle LDJ being greater than 180 degrees, thus preventing the moving contact 120 from reliably contacting the stationary contact 130, thereby ensuring the reliability of the switchgear 100.
[0082] Based on the switchgear 100 provided in the example above, please refer to... Figures 4-7 The limiting assembly 150 also includes a limiting protrusion 152, which is located on the side of the connection position facing the stationary contact 130. The limiting protrusion 152 is used to limit the rotation angle of the limiting rod 151.
[0083] A limiting protrusion 152 is provided on the side of the connecting protrusion 113 facing the stationary contact 130. The limiting protrusion 152 is integrally formed with the connecting protrusion 113. Along the direction from the connecting protrusion 113 to the limiting protrusion 152, at least a portion of the projection of the limiting protrusion 152 is outside the projection range of the connecting protrusion 113, so that the limiting rod 151 can abut against the limiting protrusion 152 during rotation relative to the connecting protrusion 113. The limiting protrusion 152 can be spaced apart from the connecting position to reduce the possibility of interference between the limiting protrusion 152 and the limiting rod 151.
[0084] In this example, by setting the limiting protrusion 152 to be located on the side of the connection position facing the stationary contact 130, if the limiting rod 151 tends to rotate towards the stationary contact 130 during the process of switching the switchgear 100 from the closed state to the open state, the limiting rod 151 will abut against the limiting protrusion 152. This prevents the arc-blocking member 160 from flipping towards the stationary contact 130 due to the rotation of the limiting rod 151 towards the stationary contact 130, which would cause the arc-blocking member 160 to get stuck between the moving contact 120 and the bottom wall 112. This ensures the reliability of the arc-blocking member 160 and thus ensures the performance of the switchgear 100.
[0085] Based on the switchgear 100 provided in the example above, please refer to... Figures 4-7 The switch 100 also includes an insulation structure 114, at least part of which is located between the limit rod 151 and the stationary contact 130.
[0086] The insulating structure 114 can be fixedly connected to the limiting rod 151, or the insulating structure 114 can be spaced apart from the limiting rod 151. This application example does not impose specific limitations on this.
[0087] In this application example, by setting at least a partial insulation structure 114 between the limit rod 151 and the stationary contact 130, the creepage distance between the limit rod 151 and the stationary contact 130 can be increased, reducing the possibility of voltage breakdown between the limit rod 151 and the stationary contact 130 during the use of the switchgear 100, and ensuring the performance of the switchgear 100.
[0088] Based on the switching device 100 provided in the above example, the insulation structure 114 includes an insulating plate and / or an insulating layer. The insulating plate is disposed between the stationary contact 130 and the limiting rod 151. The insulating layer is sleeved on the outside of the limiting rod 151.
[0089] The insulation structure 114 may include only an insulation plate, or it may include only an insulation layer, or it may include both an insulation plate and an insulation layer.
[0090] The insulating plate can be integrally formed with the housing 110, or it can be connected to the bottom wall 112 by means of plugging or other methods. The insulating plate and the limiting protrusion 152 can be integrally formed, or they can be spaced apart. When the insulating plate and the limiting protrusion 152 are spaced apart, the insulating plate is located on the side of the limiting protrusion 152 closer to the stationary contact 130. This application example does not impose specific limitations on this.
[0091] The insulating layer can be made of insulating materials such as polyvinyl chloride, polyethylene, and polypropylene. The insulating layer can be directly coated onto the outer periphery of the limiting rod 151, or it can be sleeved onto the outer periphery of the limiting rod 151, so that part of the insulating layer is located between the stationary contact 130 and the limiting rod 151.
[0092] In this application example, whether an insulating plate is provided between the stationary contact 130 and the limiting rod 151, or an insulating layer is sleeved on the outside of the limiting rod 151, the creepage distance between the limiting rod 151 and the stationary contact 130 can be increased, reducing the possibility of voltage breakdown between the limiting rod 151 and the stationary contact 130 during the use of the switchgear 100, and ensuring the performance of the switchgear 100.
[0093] In some possible implementations, the limiting component includes a first limiting structure and a second limiting structure (not shown in the figure) that cooperate with each other. The first limiting structure is located on the side wall of the housing 110, and the second limiting structure is located at the second position 1612 of the arc-blocking member 160. The second limiting structure is slidable relative to the first limiting structure.
[0094] The extension direction of the first limiting structure is adapted to the rotation trajectory of the second position 1612 of the arc-blocking member 160 within the housing 110, so as to reduce the resistance of the second limiting structure relative to the first limiting structure during the sliding process and ensure the reliability of the arc-blocking member 160's movement within the housing 110.
[0095] The number of first limiting structures is equal to the number of second limiting structures, and the setting position of the second limiting structure corresponds to the setting position of the first limiting structure, so that the second limiting structure can slide and cooperate with the corresponding first limiting structure.
[0096] The first limiting structure is disposed on the side wall of the housing 110, specifically on the side wall of the mounting cavity 111. The first limiting structure may be disposed on only one side wall of the mounting cavity 111, or two first limiting structures may be disposed on two opposite side walls of the mounting cavity 111. When both opposite side walls of the mounting cavity 111 are provided with first limiting structures, the two first limiting structures, in conjunction with corresponding second limiting structures, limit the arc-isolating member 160 from different positions. This ensures a more stable installation of the arc-isolating member 160 within the housing 110, guaranteeing the stability of the fit between the arc-isolating member 160 and the housing 110.
[0097] Whether there is one or two first limiting structures, the first limiting structures can both be groove structures. Correspondingly, the second limiting structure is a protrusion structure, with part of the protrusion structure extending into the groove structure and sliding relative to the groove structure.
[0098] The first limiting structure can also be a protruding structure. Correspondingly, the second limiting structure is a sliding groove structure, with some of the protruding structures extending into the sliding groove structure and sliding relative to the sliding groove structure.
[0099] When there are two first limiting structures, one can be a protruding structure and the other a sliding groove structure, and the specific structure of the second limiting structure can be adapted to the specific structure of the first limiting structure.
[0100] In this application example, based on the linkage rod 140 being connected to the first position 1611 of the arc-blocking member 160, the second limiting structure is slidable relative to the first limiting structure. Since the first limiting structure is located on the side wall of the housing 110 and the second limiting structure is located at the second position 1612 of the arc-blocking member 160, the cooperating linkage between the second limiting structure and the first limiting structure can provide different forces to the arc-blocking member 160 from different positions, reducing the possibility of the arc-blocking member 160 flipping during rotation and ensuring the reliability of the operation of the switch 100.
[0101] Finally, it should be noted that the above embodiments are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A switching device, characterized in that, include: The casing, including the bottom wall; The stationary contact is fixedly installed to the bottom wall; A moving contact is rotatably mounted to the housing, and the moving contact can rotate to a position that contacts the stationary contact; An arc-blocking component includes a first position, a second position, and an arc-blocking portion spaced apart. The arc-blocking component is rotatably connected to the moving contact at the first position via a linkage rod, and the arc-blocking component is movably connected to the housing at the second position via a limiting component. During the switching process of the switchgear switching from the open state to the closed state, the moving contact drives the linkage rod to move closer to the bottom wall, and the linkage rod, in conjunction with the limiting component, drives the arc-blocking component to be located between the moving contact and the bottom wall; during the switching process of the switchgear switching from the closed state to the open state, the moving contact drives the linkage rod to move away from the bottom wall, and the linkage rod, in conjunction with the limiting component, drives the arc-blocking component to move away from the bottom wall; when the switchgear is in the open state, the arc-blocking part is located between the stationary contact and the moving contact.
2. The switching device according to claim 1, characterized in that, The moving contact includes a moving rod and a moving contact point. The moving contact point can contact the stationary contact. When the switch is in the closed state, the size of the projection of the arc-blocking member in the direction perpendicular to the bottom wall towards the moving contact point is smaller than the size of the projection of the moving rod in the direction towards the moving contact point.
3. The switching device according to claim 1, characterized in that, The limiting assembly includes a limiting rod, and the bottom wall is provided with a connecting protrusion. The connecting protrusion is located on the side of the stationary contact facing the rotation center of the moving contact. The first end of the limiting rod is rotatably connected to the second position, and the second end of the limiting rod is rotatably connected to the connecting position of the connecting protrusion.
4. The switching device according to claim 3, characterized in that, The limiting rod and the linkage rod form a linkage angle, the opening of the linkage angle is set away from the rotation center of the moving contact, and the linkage angle is less than 180 degrees.
5. The switching device according to claim 4, characterized in that, The limiting component further includes a limiting protrusion, which is located on the side of the connection position facing the stationary contact. The limiting protrusion is used to limit the rotation angle of the limiting rod.
6. The switching device according to any one of claims 3 to 5, characterized in that, It also includes an insulating structure, at least a portion of which is disposed between the limiting rod and the stationary contact.
7. The switching device according to claim 6, characterized in that, The insulating structure includes: An insulating plate is disposed between the stationary contact and the limiting rod; and / or, An insulating layer is fitted onto the outside of the limiting rod.
8. The switching device according to claim 1, characterized in that, The limiting component includes a first limiting structure and a second limiting structure that cooperate with each other. The first limiting structure is disposed on the side wall of the housing, and the second limiting structure is disposed at the second position of the arc-blocking member. The second limiting structure is slidable relative to the first limiting structure.
9. The switching device according to claim 1, characterized in that, The arc-blocking component further includes a fixed section and a connecting section. One end of the connecting section is connected to the fixed section, and the other end of the connecting section is connected to the arc-blocking part. The first position and the second position are located on the fixed section.
10. The switching device according to claim 9, characterized in that, When the switch is in the closed state, the fixed section and the arc-blocking part are located on different planes along the direction perpendicular to the bottom wall.