Switch assembly

Abstract

A switch assembly comprises a shell, a static contact, a movable contact knife assembly and a rotating shaft, the static contact is arranged at two ends of the shell in a central symmetry mode, the movable contact knife assembly rotates relative to the shell to form an arc-shaped rotating path b matched with the static contact for opening and closing, the movable contact knife assembly comprises the rotating shaft, the rotating shaft is fixedly provided with a movable contact knife, and the movable contact knife has a central axis L1. The rotating shaft is also provided with first magnetic members, the first magnetic members are arranged at the two sides of the moving contact knife, and the magnetic field direction of the first magnetic members is perpendicular to the central axis L1. The magnetic assembly is arranged on the outer side of the arc-shaped rotating path b and provided with a central axis L2, arc extinction is faster during breaking through cooperation of the magnetic assembly and the first magnetic piece, and meanwhile the switching-on reliability and the breaking speed are improved by means of changes of a magnetic field.

Description

A switching component Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to a switch assembly. Background Technology

[0002] In the prior art, rotary disconnect switches are typically composed of several stacked switch components. Each switch component includes a housing, a moving contact, a stationary contact, and a rotating frame for the moving contact. The moving contact is mounted on the rotating frame, which is rotatably mounted on the housing. The stationary contact is fixed to the housing and located on the rotation path of the moving contact. When the rotating frame rotates, it connects or disconnects the moving contact with the stationary contact, thus closing or opening the circuit.

[0003] In existing technologies, magnets are usually installed inside the switching device to extinguish the arc. The magnets are generally placed directly on the support of the moving contact or on the housing of the switching device. The magnetic field generated by the magnets is used to ignite the arc. However, this method has the problem of poor arc extinguishing effect, resulting in poor safety performance of the switching device.

[0004] For example, Chinese patent CN117095963A discloses a switching unit and switching device, which mainly sets a magnetic component on the outside of the arc-shaped rotation path of the moving contact knife. The magnetic component is combined with the airflow channel to improve the arc extinguishing effect by coordinating the magnetic field and airflow. However, it is actually still setting a magnetic component on the outside of the arc-shaped rotation path. It only adds an airflow channel, and its arc extinguishing effect still cannot be satisfied. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a switching component.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A switching assembly comprising:

[0008] case,

[0009] The stationary contacts are symmetrically arranged at both ends of the housing.

[0010] The moving contact knife assembly rotates relative to the housing to form an arc-shaped rotation path b that cooperates with the stationary contact for opening and closing. The moving contact knife assembly includes a rotating shaft, on which a moving contact knife is fixedly mounted. The moving contact knife has a central axis L1. A first magnetic element is also mounted on the rotating shaft. The first magnetic element is disposed on both sides of the moving contact knife, and the magnetic field direction of the first magnetic element is perpendicular to the central axis L1.

[0011] A magnetic component, located on the outside of the arc-shaped rotation path b, has a central axis L2.

[0012] The first magnetic component includes a first magnetic component A and a first magnetic component B. There are two magnetic assemblies, each equipped with a second magnetic component C and a second magnetic component D. When the moving contact assembly and the stationary contact are closed, the first magnetic component A and the second magnetic component C are located on the upper side of the housing, and the first magnetic component B and the second magnetic component D are located on the lower side of the housing.

[0013] There is an angle α between the central axis L1 of the moving contact knife and the central axis L2 of the magnetic component. During the closing process, when the angle α is greater than 90°, the first magnetic component A and the second magnetic component C, as well as the first magnetic component B and the second magnetic component D, respectively cooperate to form a force for closing.

[0014] During the tripping process, when the included angle α is less than 90°, the first magnetic component A and the second magnetic component D, as well as the first magnetic component B and the second magnetic component C, cooperate to form a force to accelerate the tripping.

[0015] The magnetic component includes a second magnetic element and a magnetizing sheet stacked together.

[0016] The housing has a groove, and a magnetic component is fixedly installed in the groove.

[0017] The stationary contact has a horizontal axis L3, and the angle c between the central axis L2 and the horizontal axis L3 is less than 90 degrees.

[0018] The rotating shaft is provided with operating mechanism linkage grooves on both sides. The operating mechanism linkage grooves are elongated and have transition grooves at both ends that match the arc-shaped rotation path b.

[0019] The housing is also provided with an airflow channel, and the airflow channel is arranged opposite to the magnetic component.

[0020] The airflow channel includes a first air passage that communicates with the space where the moving contact blade and the stationary contact are located, a second air passage that is arranged in an arc shape, and a third air passage that communicates with the outside of the housing. The second air passage communicates with the first air passage and the third air passage respectively, and the connection between the second air passage and the first air passage is designed in a folding manner.

[0021] The third airway is equipped with an arc-extinguishing plate.

[0022] The beneficial effects of this utility model are: by cooperating with the magnetic component and the first magnetic element, the arc can be extinguished faster during disconnection, and the change of magnetic field can be used to improve the reliability of closing and the speed of disconnection. Attached Figure Description

[0023] Figure 1 is a schematic diagram of the internal structure of this utility model.

[0024] Figure 2 is a structural schematic diagram of this utility model (maximum opening position).

[0025] Figure 3 is a structural schematic diagram of this utility model (initial tripping).

[0026] Figure 4 is a structural schematic diagram of this utility model (closed position).

[0027] Figure 5 is a structural schematic diagram of this utility model (near-closed closing).

[0028] Figure 6 is a schematic diagram of the moving blade assembly. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0031] As shown in Figure 1, this utility model discloses a switch assembly, which includes a housing 100. The housing 100 has a cavity. The housing is rectangular and has four ends. Stationary contacts 200 are located at both ends of the housing, as shown at the left and right ends in Figure 2. The two stationary contacts are symmetrically arranged with respect to the center of the rotating shaft. The housing is divided into upper and lower spaces. Each space is provided with a magnetic component and an airflow channel. The magnetic components and airflow channels in the two spaces are staggered. The moving contact assembly is rotatably disposed in the cavity of the housing through the rotating shaft. When the moving contact rotates, it opens and closes with the stationary contacts respectively.

[0032] The moving contact assembly 400 rotates relative to the housing 100 to form an arc-shaped rotation path b that cooperates with the stationary contact 200 for opening and closing. The moving contact assembly 400 includes a rotating shaft 410, on which a moving contact 420 is fixedly mounted. The moving contact 420 has a central axis L1. A first magnetic element 430 is also mounted on the rotating shaft 410. The first magnetic element 430 is disposed on both sides of the moving contact 420, and its magnetic field direction is perpendicular to the central axis L1. The first magnetic element 430 is a plate-shaped magnet inserted into a slot on the rotating shaft, thus making the entire first magnetic element parallel to the central axis L1, and its magnetic field oriented perpendicular to the central axis L1.

[0033] The magnetic component 300 is located on the outside of the arc-shaped rotation path b and has a central axis L2. The magnetic component 300 includes a second magnetic element 310 and a magnetizing sheet 320 that are stacked together.

[0034] The housing 100 has a groove, and a magnetic component 300 is fixedly installed in the groove. The groove is used to fix the magnetic component, ensuring that its position within the housing is always fixed and guaranteeing the cooperation between the first magnetic element and the magnetic component.

[0035] The first magnetic element 430 includes a first magnetic element A and a first magnetic element B. There are two magnetic assemblies 300, each equipped with a second magnetic element C and a second magnetic element D. When the moving contact assembly 400 and the stationary contact 200 are closed, the first magnetic element A and the second magnetic element C are located on the upper side of the housing 100, and the first magnetic element B and the second magnetic element D are located on the lower side of the housing 100.

[0036] There is an angle α between the central axis L1 of the moving contact knife and the central axis L2 of the magnetic component 300. During the closing process, when the angle α is greater than 90°, the first magnetic component A and the second magnetic component C, as well as the first magnetic component B and the second magnetic component D, respectively cooperate to form a force for closing.

[0037] During the tripping process, when the included angle α is less than 90°, the first magnetic component A and the second magnetic component D, as well as the first magnetic component B and the second magnetic component C, cooperate to form a force to accelerate the tripping.

[0038] The stationary contact 200 has a horizontal axis L3, and the angle c between the central axis L2 and the horizontal axis L3 is less than 90 degrees. In this embodiment, the angle between the central axis L2 and the horizontal axis L3 is 55°.

[0039] As shown in Figure 3, in the initial stage of circuit breaking, the first magnetic component is not positioned opposite to the second magnetic component. Therefore, the electric arc is subjected to transverse electromagnetic force (non-polar structure, regardless of current direction) within the field strength formed by the second magnetic component and the magnetizing sheet, causing it to be rapidly elongated.

[0040] As shown in Figure 2, in the later stage of the circuit breaker tripping, a stronger magnetic field is formed by the first magnetic component, the second magnetic component, and the magnetizing sheet, and this field continues to increase during the disconnection of the rotating system. The arc is subjected to a transverse electromagnetic force (non-polar structure, regardless of the current direction), which causes it to be rapidly elongated, greatly shortening the arc extinction time.

[0041] As shown in Figure 4, when the moving contact and the stationary contact are closed, the angle α between their central axis L1 and central axis L2 is greater than 90°, as shown in Figure 5. When the circuit is closed (and the angle α > 90°), the combination of the first magnetic component A, the second magnetic component C, the first magnetic component B, and the second magnetic component D creates an attractive force, ensuring reliable closure of the product.

[0042] During the tripping process, as shown in Figure 2, the included angle α < 90°. The combination of the first magnetic component B and the second magnetic component C, and the combination of the first magnetic component A and the second magnetic component D, exert an attractive force, accelerating the rotation of the system counterclockwise (in the tripping direction) and increasing the tripping speed.

[0043] That is, during the rotation of the moving contact assembly, the two first magnetic components and the second magnetic component respectively produce different combinations, thereby using the force of the two to provide corresponding force for opening and closing the circuit.

[0044] The rotating shaft is provided with an operating mechanism linkage groove 411 on both sides. The operating mechanism linkage groove 411 is elongated and has a transition groove 412 on both ends that matches the arc-shaped rotation path b.

[0045] When the product trips, after the mechanism reaches the limit tripping position, the rotating shaft continues to rotate to the final limit position with the attraction of the combination of the first magnetic component B / second magnetic component C and the first magnetic component A / second magnetic component D. This increases the opening distance between the two break points, lengthens the breaking arc, and improves the breaking capacity.

[0046] As shown in Figures 1 and 2, the housing 100 is also provided with an airflow channel 500, and the airflow channel 500 is arranged opposite to the magnetic component.

[0047] The airflow channel 500 includes a first airway 510 communicating with the space where the moving contact and stationary contact are located, an arc-shaped second airway 520, and a third airway 530 communicating with the outside of the housing 100. The second airway 520 connects to both the first airway 510 and the third airway 530. The connection between the second airway 520 and the first airway 510 is a folded-back design, meaning the angle between the axis of the first airway and the horizontal line is less than 90 degrees. The airway then folds back through the second airway and connects to the third airway. An arc-suppressing plate 540 is provided within the third airway 530. The arc-suppressing plate is designed to prevent arcing from damaging the terminal block during product breakage.

[0048] The embodiments should not be regarded as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A switching assembly, characterized in that: It includes: A housing (100) and stationary contacts (200) are symmetrically arranged at both ends of the housing (100). A moving contact assembly (400) rotates relative to the housing (100) to form an arc-shaped rotation path b that cooperates with the stationary contacts (200) for opening and closing. The moving contact assembly (400) includes a rotating shaft (410), on which a moving contact (420) is fixedly mounted. The moving contact (420) has a central axis L1. A first magnetic element (430) is also provided on the rotating shaft (410). The first magnetic element (430) is disposed on both sides of the moving contact (420), and the magnetic field direction of the first magnetic element (430) is perpendicular to the central axis L1. A magnetic assembly (300) is also provided. Located on the outside of the arc-shaped rotation path b, it has a central axis L2. The first magnetic element (430) includes a first magnetic element A and a first magnetic element B. There are two magnetic components (300), and they are respectively provided with a second magnetic element C and a second magnetic element D. When the moving contact assembly (400) and the stationary contact (200) are closed, the first magnetic element A and the second magnetic element C are located on the upper side of the housing (100), and the first magnetic element B and the second magnetic element D are located on the lower side of the housing (100). There is an angle α between the central axis L1 of the moving contact and the central axis L2 of the magnetic component (300). During the closing process, when the angle α is greater than 90°, the first magnetic element A and the second magnetic element C, as well as the first magnetic element B and the second magnetic element D, respectively cooperate to form a force for closing. During the opening process, when the angle α is less than 90°, the first magnetic element A and the second magnetic element D, as well as the first magnetic element B and the second magnetic element C, respectively cooperate to form a force for accelerating the breaking.

2. A switching assembly according to claim 1, characterized in that: The magnetic component (300) includes a second magnetic element (310) and a magnetizing sheet (320) stacked together.

3. A switching assembly according to claim 1 or 2, characterized in that: The housing (100) has a groove, and a magnetic component (300) is fixedly installed in the groove.

4. A switching assembly according to claim 3, characterized in that: The stationary contact (200) has a horizontal axis L3, and the angle c between the central axis L2 and the horizontal axis L3 is less than 90 degrees.

5. A switching assembly according to claim 3, characterized in that: The rotating shaft is provided with operating mechanism linkage grooves (411) on both sides. The operating mechanism linkage grooves (411) are elongated, and the two ends of the grooves are respectively provided with transition grooves (412) that match the arc-shaped rotation path b.

6. A switching assembly according to claim 1, characterized in that: The housing (100) is also provided with an airflow channel (500), and the airflow channel (500) is arranged opposite to the magnetic component.

7. A switching assembly according to claim 6, characterized in that: The airflow channel (500) includes a first air passage (510) that communicates with the space where the moving contact (420) and the stationary contact are located, a second air passage (520) that is arranged in an arc shape, and a third air passage (530) that communicates with the outside of the housing (100). The second air passage (520) communicates with the first air passage (510) and the third air passage (530) respectively, and the connection between the second air passage (520) and the first air passage (510) is designed in a folding manner.

8. A switching assembly according to claim 7, characterized in that: The third air passage (530) is equipped with an arc-extinguishing plate (540).

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