Yoke clamp and high voltage DC relay

Abstract

This application relates to a yoke clamp and a high-voltage DC relay. The yoke clamp includes: a first clamp body; and a second clamp body; wherein, a first snap-fit ​​portion extends from one end of the first clamp body toward the second clamp body, and a second snap-fit ​​portion extends from one end of the second clamp body toward the first clamp body. The first snap-fit ​​portion and the second snap-fit ​​portion are disposed opposite to each other and snap-fit ​​connected, so that the first clamp body and the second clamp body are connected to form a ring structure and surround the periphery of an insulating cover. In this way, the snap-fit ​​connection between the extended first snap-fit ​​portion and the second snap-fit ​​portion achieves a reliable connection between the first clamp body and the second clamp body, preventing the first clamp body and the second clamp body from loosening, thereby ensuring the performance of the yoke clamp. At the same time, it also simplifies the assembly process and facilitates the assembly of the yoke clamp and the insulating cover.

Description

Technical Field

[0001] This application relates to the field of relay technology, and in particular to a yoke clamp and a high-voltage DC relay. Background Technology

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is commonly used in automatic control circuits. Essentially, a relay is an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in circuits.

[0003] A high-voltage DC relay is a type of relay. Current high-voltage DC relays include an insulating cover, a yoke clamp, a permanent magnet, a pair of stationary contacts, and a moving contact. The pair of stationary contacts are respectively mounted on the top of the insulating cover, and the moving contact is located inside the insulating cover, with both ends of the moving contact corresponding to the bottom of the pair of stationary contacts along its length.

[0004] The yoke clamp surrounds the outer perimeter of the insulating cover, and the permanent magnet is located on the side of the yoke clamp facing the insulating cover. The yoke clamp and the permanent magnet work together to extinguish the arc. However, currently, after the yoke clamp is assembled, due to the influence of the fitting clearance, the movement of parts during the forward displacement of the product casing can cause the fitting clearance to increase or even loosen, affecting the assembly effect. Utility Model Content

[0005] Therefore, it is necessary to address the problem of easy loosening caused by gaps in the yoke clamps of current high-voltage DC relays by providing a yoke clamp and a high-voltage DC relay that can reliably surround the periphery of the insulating cover. Even if the internal components shake, the yoke clamp will not loosen. Furthermore, the assembly process of this yoke clamp is simple and convenient for assembling the yoke clamp and the insulating cover.

[0006] A yoke clip surrounds the periphery of the insulating cover of a high-voltage DC relay, the yoke clip comprising:

[0007] The first clamp body; and

[0008] Second clamp main body;

[0009] The first clamping body has a first snap-fit ​​portion extending towards one end of the second clamping body, and the second clamping body has a second snap-fit ​​portion extending towards one end of the first clamping body. The first snap-fit ​​portion and the second snap-fit ​​portion are arranged opposite to each other and snap-fitted together, so that the first clamping body and the second clamping body are connected to form a ring structure and surround the periphery of the insulating cover.

[0010] In one embodiment of this application, the first clamp body and the second clamp body are able to engage with the first snap-fit ​​portion and the second snap-fit ​​portion on the periphery of the insulating cover;

[0011] And / or, the first snap-fit ​​portion and the second snap-fit ​​portion are snap-fitted together along the height direction of the insulating cover.

[0012] In one embodiment of this application, the first snap-fit ​​portion includes a first hook portion, the second snap-fit ​​portion includes a second hook portion, the first hook portion and the second hook portion have different orientations, and the first hook portion and the second hook portion can snap-fit ​​connection.

[0013] In one embodiment of this application, the first snap-fit ​​portion further includes a first connecting arm, the first connecting arm is disposed on the first clamp body and extends toward the second clamp body, the first hook portion protrudes from the end of the first connecting arm away from the first clamp body, and the first hook portion, the first connecting arm and the first clamp body form a first space to accommodate the second hook portion.

[0014] And / or, the second snap-fit ​​portion further includes a second connecting arm, which is disposed on the second clamp body and extends toward the second clamp body. The second hook portion protrudes from one end of the second connecting arm away from the second clamp body. The second hook portion, the second connecting arm, and the second clamp body form a second space to accommodate the first hook portion.

[0015] In one embodiment of this application, the surface of the first hook portion facing the second hook portion has a first guide surface, the first guide surface being inclined from the end of the first hook portion toward a direction away from the second hook portion, for guiding the second hook portion to engage with the first hook portion;

[0016] And / or, the surface of the second hook facing the first hook has a second guide surface, the second guide surface being inclined from the end of the second hook toward a direction away from the first hook, for guiding the first hook to engage with the second hook.

[0017] In one embodiment of this application, one of the first hook portion and the second hook portion extends toward the stationary contact in the high voltage DC relay, and the other extends away from the stationary contact.

[0018] Alternatively, one of the first hook and the second hook may extend toward or away from the insulating cover, while the other may extend toward or away from the stationary contact in the high-voltage DC relay.

[0019] In one embodiment of this application, the first clamping body includes two first snap-fit ​​portions, and the second clamping body includes two second snap-fit ​​portions, wherein the two second snap-fit ​​portions are respectively snap-fitted to the corresponding first snap-fit ​​portions.

[0020] In one embodiment of this application, two first latching portions are symmetrically arranged, and two second latching portions are symmetrically arranged.

[0021] In one embodiment of this application, the first snap-fit ​​portion and the first clip body are integrally formed, and / or the second snap-fit ​​portion and the second clip body are integrally formed;

[0022] And / or, after the first clamp body is connected to the second clamp body, there is a preset gap between the first clamp body and the second clamp body, and the first snap-fit ​​part and the second snap-fit ​​part are located in the preset gap.

[0023] In one embodiment of this application, there is one first clamping body and one second clamping body. The first clamping body and the second clamping body are arranged in a U-shape. The first clamping body and the second clamping body are connected to form a ring structure and surround the periphery of the insulating cover.

[0024] Alternatively, the yoke clamp may further include at least one third clamp body, the third clamp body having a first snap-fit ​​portion and a second snap-fit ​​portion, the first clamp body and the second clamp body being connected by at least one third clamp body to form an annular structure and surrounding the periphery of the insulating cover, the first clamp body, the second clamp body and at least one third clamp body being snap-fitted together by the first snap-fit ​​portion and the second snap-fit ​​portion.

[0025] In one embodiment of this application, the first clamping body includes a first end plate and two first side plates, the two first side plates being disposed opposite to the first end plate to form a U-shaped first clamping body, and the first snap-fit ​​portion being disposed at the end of the first side plate away from the first end plate;

[0026] And / or, the second clamping body includes a second end plate and two second side plates, the two second side plates being disposed opposite to the second end plate to form a U-shaped second clamping body, and the second snap-fit ​​portion being disposed at the end of the second side plate away from the second end plate.

[0027] In one embodiment of this application, both the first clamp body and the second clamp body have a limiting protrusion protruding toward the insulating cover, the limiting protrusion protruding toward the insulating cover for limiting the permanent magnet in the high voltage DC relay;

[0028] And / or, one end of the first clamping body and the second clamping body has a protruding first fixing protrusion, which is used to lock the housing of the high voltage DC relay;

[0029] And / or, both the first clamp body and the second clamp body have a protruding second fixing protrusion at the other end, the second fixing protrusion being used to abut against the yoke plate of the high voltage DC relay.

[0030] A high-voltage DC relay includes a yoke clip as described in any of the above technical features.

[0031] In one embodiment of this application, the high-voltage DC relay further includes at least an insulating cover, a stationary contact, a moving contact, and a permanent magnet;

[0032] The stationary contact is installed on the top of the insulating cover, and the moving contact is located inside the insulating cover and can contact or separate from the stationary contact;

[0033] The yoke clamp surrounds the periphery of the insulating cover, and the permanent magnet is disposed between the yoke clamp and the insulating cover.

[0034] In one embodiment of this application, the insulating cover is a ceramic cover.

[0035] By adopting the above technical solution, this application has at least the following technical effects:

[0036] The yoke clamp and high-voltage DC relay of this application have a first latching portion extending out at the end of the first clamp body facing the second clamp body, and a second latching portion extending out at the end of the second clamp body facing the first clamp body. After the first clamp body and the second clamp body are assembled, the first clamp body and the second clamp body can be connected by the first latching portion and the second latching portion, so that the first clamp body and the second clamp body are connected to form a ring structure and surround the periphery of the insulating cover.

[0037] This yoke clamp achieves a reliable connection between the first and second clamp bodies through the snap-fit ​​connection of the extended first and second snap-fit ​​portions. This ensures that even if internal components shake during the displacement of the high-voltage DC relay, the snap-fit ​​connection prevents the first and second clamp bodies from becoming loose, thus guaranteeing the performance of the yoke clamp. Furthermore, because the first and second snap-fit ​​portions extend outwards, during assembly, one clamp body can be installed onto the outside of the insulating cover first, followed by the other, before the first and second snap-fit ​​portions are engaged. This simplifies the assembly process and facilitates the assembly of the yoke clamp and the insulating cover.

[0038] Furthermore, the first clamp body and the second clamp body are connected by a first snap-fit ​​part and a second snap-fit ​​part on the periphery of the insulating cover. In this way, after the first clamp body and the second clamp body are respectively assembled to the outside of the insulating cover, the first snap-fit ​​part and the second snap-fit ​​part are then connected, simplifying the assembly process and facilitating the assembly of the yoke clamp and the insulating cover.

[0039] Furthermore, the first snap-fit ​​part and the second snap-fit ​​part are snap-fitted together along the height direction of the insulating cover, so that the first snap-fit ​​part and the second snap-fit ​​part can be assembled along the height direction, which facilitates the assembly of the yoke clamp and the insulating cover.

[0040] Furthermore, the first snap-fit ​​part and the second snap-fit ​​part are connected by the snap-fit ​​of the first hook part and the second hook part, so as to realize a reliable connection between the first clamp body and the second clamp body, so that the first clamp body and the second clamp body will not be loosened, thereby ensuring the performance of the yoke clamp and simplifying the assembly process, making it convenient to assemble the yoke clamp and the insulating cover.

[0041] Furthermore, the first guide surface guides the second hook to engage with the first hook, and the second guide surface guides the first hook to engage with the second hook, facilitating the assembly and connection of the first clamp body and the second clamp body.

[0042] Furthermore, the permanent magnet is limited by the limiting protrusion to prevent its position from shifting; the outer side of the high-voltage DC relay is fixed by the first fixing protrusion to ensure the accuracy of the assembly between the yoke clamp and the housing; the yoke clamp is abutted against the yoke plate of the high-voltage DC relay by the second fixing protrusion to ensure the stability of the yoke clamp relative to the yoke plate. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of a high-voltage DC relay according to an embodiment of this application.

[0044] Figure 2 for Figure 1 A partial schematic diagram of a high-voltage DC relay is shown.

[0045] Figure 3 for Figure 2 The front view of the high-voltage DC relay is shown.

[0046] Figure 4 for Figure 2 The diagram shows the yoke clamp in the high-voltage DC relay.

[0047] Figure 5 for Figure 3 The image shows a magnified view of the high-voltage DC relay at point A.

[0048] Figure 6 for Figure 2 The diagram shows the assembly process of the yoke clamp in the high-voltage DC relay.

[0049] Figure 7 for Figure 4 A schematic diagram of the first clamp body in the yoke clamp shown.

[0050] Figure 8 for Figure 7 The image shows a magnified view of the first clamping body at point B.

[0051] Figure 9 for Figure 4 A schematic diagram of the second clamp body in the yoke clamp shown.

[0052] Figure 10 for Figure 9 The enlarged view of the second clamp body at point C is shown.

[0053] Figure 11 for Figure 5 A schematic diagram of another embodiment of the yoke clamp shown.

[0054] Wherein: 10, high voltage DC relay; 100, yoke clamp; 110, first clamp body; 111, first snap-fit ​​part; 1111, first hook part; 1112, first connecting arm; 1113, first space; 1114, first guide surface; 112, first end plate; 113, first side plate; 114, limiting protrusion; 115, first fixing protrusion; 116, second fixing protrusion; 120, second clamp body; 121, second snap-fit ​​part; 1211, second hook part; 1212, second connecting arm; 1213, second space; 1214, second guide surface; 122, second end plate; 123, second side plate; 200, insulating cover; 300, stationary contact; 400, permanent magnet; 500, electromagnetic drive structure; 600, yoke plate. Detailed Implementation

[0055] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0056] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0057] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0059] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact, or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0060] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0061] Understandably, a relay is an electronic control device that plays a role in automatic adjustment, safety protection, and circuit switching in a circuit. A high-voltage DC relay is a type of relay. Current high-voltage DC relays include an insulating cover, a yoke clamp, a permanent magnet, a pair of stationary contacts, and a moving contact. The pair of stationary contacts are respectively mounted on the top of the insulating cover, and the moving contact is located inside the insulating cover, with both ends of the moving contact corresponding to the bottom of the pair of stationary contacts along its length.

[0062] The yoke clamp surrounds the outer perimeter of the insulating cover, and the permanent magnet is located on the side of the yoke clamp facing the insulating cover. The yoke clamp and the permanent magnet work together to extinguish the arc. However, currently, after the yoke clamp is assembled, due to the influence of the fitting clearance, the movement of parts during the forward displacement of the product casing can cause the fitting clearance to increase or even loosen, affecting the assembly effect.

[0063] For this purpose, please refer to Figures 1 to 4 This application provides a yoke clamp 100. The yoke clamp 100 is used in a high-voltage DC relay 10. Figure 1 This is a schematic diagram of a high-voltage DC relay 10 according to an embodiment of this application. Figure 2 for Figure 1 A partial schematic diagram of the high-voltage DC relay 10 shown. Figure 3 for Figure 2 The front view of the high-voltage DC relay 10 shown is shown. Figure 4 for Figure 2 A schematic diagram of the yoke clamp 100 in the high-voltage DC relay 10 shown.

[0064] In the high-voltage DC relay 10, the yoke clamp 100 serves to guide magnetism and optimize the magnetic circuit. Simultaneously, the yoke clamp 100 supports the components of the high-voltage DC relay 10 and has the ability to resist deformation, preventing deformation of the magnetic circuit. Furthermore, during high-voltage DC interruption, the yoke clamp 100 enhances magnetic flux, preventing the magnetic field generated by the permanent magnet from spreading outwards and affecting the arc-extinguishing effect.

[0065] To better illustrate the structure of the yoke clamp 100, the structure of the high-voltage DC relay 10 will be briefly introduced here. (See also...) Figures 1 to 3The high-voltage DC relay 10 includes an insulating cover 200, a moving contact (not shown), a stationary contact 300, a permanent magnet 400, and the yoke clamp 100 of this application. The stationary contact 300 passes through the insulating cover 200 along the height direction and extends into the insulating cover 200. The moving contact is movably disposed in the insulating cover 200 along the height direction and can contact or detach from the stationary contact 300.

[0066] A yoke clamp 100 is arranged around the periphery of the insulating cover 200, and a permanent magnet 400 is disposed between the yoke clamp 100 and the insulating cover 200. Figures 1 to 4 As shown, the height direction refers to the vertical direction, the length direction refers to the horizontal direction, and the width direction refers to the front-to-back direction. These height, length, and width directions apply to the high-voltage DC relay 10 and its various components, and will not be elaborated upon further below.

[0067] The moving contact and stationary contact 300 are arranged along the height direction. The stationary contact 300 is located above the insulating cover 200, which has mounting holes through which a portion of the stationary contact 300 extends into the insulating cover 200. The moving contact is disposed within the insulating cover 200 along the height direction. When the moving contact rises along the height direction, it can contact the stationary contact 300 to form a conductive path. When the moving contact descends along the height direction, it can separate from the stationary contact 300 to form an open circuit.

[0068] The insulating cover 200 provides electrical insulation, withstands the high electric field strength of high-voltage DC, and prevents leakage current or creepage, ensuring the stable operation of the high-voltage DC relay 10. Optionally, the insulating cover 200 is a ceramic cover. A permanent magnet 400 is disposed on the outside of the insulating cover 200. The permanent magnet 400 generates a magnetic field around the moving contact and the stationary contact 300. Through the action of the magnetic field, the arc generated between the stationary contacts 300 is elongated in a direction away from each other, thus extinguishing the arc.

[0069] The yoke clip 100 has a ring-shaped structure and is arranged around the periphery of the insulating cover 200. The permanent magnet 400 is arranged inside the yoke clip 100, meaning the yoke clip 100 can also surround the permanent magnet 400, preventing the magnetic field generated by the permanent magnet 400 from spreading outward and affecting the arc extinguishing effect. Optionally, the yoke clip 100 is made of a metal material. Further, the yoke clip 100 is made of a soft magnetic material, such as iron, cobalt, nickel, and their alloys.

[0070] In one embodiment, the high-voltage DC relay 10 further includes an electromagnetic drive structure 500, which is disposed below the insulating cover 200 and the yoke clamp 100. The electromagnetic drive structure 500 can drive the moving contact to move, so that the moving contact and the stationary contact 300 come into contact or separate, thereby forming a conductive path or a circuit break.

[0071] It is worth noting that the focus of this application is on the structure of the yoke clamp 100 and its connection method. The cooperation between the moving contact and the stationary contact 300, the structure of the insulating cover 200, the layout of the permanent magnet 400, and the structure and principle of the electromagnetic drive structure 500 are not the focus of this application. The following text will only describe the yoke clamp 100, and the structure and working principle of the high-voltage DC relay 10 will not be described.

[0072] The yoke clamp 100 of this application can reliably surround the periphery of the insulating cover 200. Even if the internal components of the high-voltage DC relay 10 shake during displacement, the yoke clamp 100 will not loosen, ensuring the performance of the yoke clamp 100 and thus ensuring the assembly effect of the high-voltage DC relay 10. Furthermore, the assembly process of the yoke clamp 100 is simple, facilitating the assembly of the yoke clamp 100 with the insulating cover 200.

[0073] See Figures 1 to 5 In one embodiment, the yoke clamp 100 includes a first clamp body 110 and a second clamp body 120. The first clamp body 110 has a first engaging portion 111 extending towards one end of the second clamp body 120, and the second clamp body 120 has a second engaging portion 121 extending towards one end of the first clamp body 110. The first engaging portion 111 and the second engaging portion 121 are disposed opposite to each other and engaged, so that the first clamp body 110 and the second clamp body 120 are connected to form a ring structure surrounding the periphery of the insulating cover 200. Figure 5 for Figure 3 The enlarged view of the high-voltage DC relay 10 at point A is shown.

[0074] The first clamping body 110 and the second clamping body 120 are the main components of the yoke clamp 100. When the first clamping body 110 and the second clamping body 120 are assembled, they are arranged opposite each other along the length direction, and are connected to form a ring structure in the yoke clamp 100. Thus, the ring-shaped yoke clamp 100 can be arranged around the periphery of the insulating cover 200. It is understood that in this application, "ring" refers to the yoke clamp 100 having a closed cross-section. Furthermore, the shape of the ring-shaped yoke clamp 100 is not limited in principle. In this embodiment, the yoke clamp 100 is a square ring. Of course, in other embodiments of this application, the yoke clamp 100 can also be a circular ring or a ring of other shapes.

[0075] Furthermore, the first clamping body 110 and the second clamping body 120 are snap-fitted together to ensure the reliability of the connection between them and prevent them from becoming loose. Specifically, the first clamping body 110 has a protruding first snap-fit ​​portion 111 at the end facing the second clamping body 120, and the second clamping body 120 has a protruding second snap-fit ​​portion 121 at the end facing the first clamping body 110. The positions of the first snap-fit ​​portion 111 and the second snap-fit ​​portion 121 are correspondingly arranged.

[0076] When the first clamping body 110 and the second clamping body 120 are assembled, the first snap-fit ​​portion 111 and the second snap-fit ​​portion 121 are correspondingly provided and can snap together to ensure a reliable connection between the first clamping body 110 and the second clamping body 120. At this time, the first snap-fit ​​portion 111 engages with the second snap-fit ​​portion 121 to prevent the second clamping body 120 from detaching from the first clamping body 110. At the same time, the second snap-fit ​​portion 121 engages with the first snap-fit ​​portion 111 to prevent the first clamping body 110 from detaching from the second clamping body 120. That is, the first clamping body 110 and the second clamping body 120 are prevented from becoming loose along the length direction.

[0077] In this way, even if the internal components of the high-voltage DC relay 10 shake during displacement, the first clamp body 110 and the second clamp body 120 will not loosen due to the snap-fit ​​connection between the first snap-fit ​​part 111 and the second snap-fit ​​part 121. This ensures that the first clamp body 110 and the second clamp body 120 reliably surround the permanent magnet 400 and the insulating cover 200, preventing the first clamp body 110 and the second clamp body 120 from loosening and affecting the assembly effect of the high-voltage DC relay 10, and ensuring the performance of the yoke clamp 100.

[0078] Simultaneously, when assembling the yoke clamp 100 with the insulating cover 200, first assemble one of the first clamp body 110 and the second clamp body 120 (e.g., by fitting from top to bottom or along the horizontal direction, which will not be elaborated further) onto one side of the insulating cover 200. Then, fit the other of the first clamp body 110 and the second clamp body 120 onto the other side of the insulating cover 200 from top to bottom. Because the first locking part 111 and the second locking part 121 are extended, when assembling the other of the first clamp body 110 and the second clamp body 120, the first locking part 111 and the second locking part 121 can engage between the first clamp body 110 and the second clamp body 120.

[0079] Understandably, due to molding issues, the insulation cover has a large dimensional deviation. If the first clamp body and the second clamp body are assembled first and then installed on the periphery of the insulation cover from top to bottom, the yoke clamp will interfere with the insulation cover, causing the yoke clamp to be unable to be accurately installed on the periphery of the insulation cover.

[0080] Furthermore, if the first clamp body and the second clamp body are respectively installed on the periphery of the insulating cover and then connected by compression, it is necessary to change the local structural strength of the first clamp body and the second clamp body. On the one hand, it will be necessary to thin a certain part, which will increase the processing steps and also affect the structural strength of the yoke clamp.

[0081] Therefore, this application provides a protruding first snap-fit ​​portion 111 on the first clamping body 110 and a protruding second snap-fit ​​portion 121 on the second clamping body 120. During assembly, the first clamping body 110 and the second clamping body 120 are respectively installed on the periphery of the insulating cover 200, and the first snap-fit ​​portion 111 and the second snap-fit ​​portion 121 can overlap in the length direction, thereby enabling snap-fit ​​connection.

[0082] In this way, the first clamp body 110 and the second clamp body 120 can be connected after being installed onto the insulating cover 200, without the need for prior assembly and installation onto the periphery of the insulating cover 200. This avoids interference between the yoke clamp 100 and the insulating cover 200, facilitates the assembly of the yoke clamp 100, and eliminates the need for local thinning of the yoke clamp 100, simplifying the manufacturing process while ensuring the structural strength of the yoke clamp 100.

[0083] See Figure 6 , Figure 6 for Figure 2 The diagram shows the assembly process of the yoke clip 100 in the high-voltage DC relay 10. Figure 6 In the diagram, the left side represents the first clamping body 110, and the right side represents the second clamping body 120. The first clamping body 110 is first assembled onto the left side of the insulating cover 200. Subsequently, the second clamping body 120 is installed from top to bottom onto the right side of the insulating cover 200. During the installation of the second clamping body 120, the second snap-fit ​​portion 121 overlaps with the first snap-fit ​​portion 111 in the length direction, and the second snap-fit ​​portion 121 gradually approaches the first snap-fit ​​portion 111 in the height direction, enabling it to snap into contact with the first snap-fit ​​portion 111.

[0084] In this way, the first clamp body 110 and the second clamp body 120 are assembled. Furthermore, the first clamp body 110 and the second clamp body 120 are reliably connected through the first snap-fit ​​part 111 and the second snap-fit ​​part 121, which prevents the first clamp body 110 and the second clamp body 120 from loosening when the internal parts of the high voltage DC relay 10 shake, thus ensuring the performance of the yoke clamp 100.

[0085] Of course, in other embodiments of this application, the second clamping body 120 may be assembled first, followed by the first clamping body 110. In the following description of the assembly of the first clamping body 110 and the second clamping body 120 into the insulating cover 200, only the following description will be used... Figure 6The following example illustrates the process of assembling the first clamping body 110 first and then the second clamping body 120.

[0086] See Figures 1 to 5 In one embodiment, the first clamping body 110 and the second clamping body 120 can be engaged with the first snap-fit ​​portion 111 and the second snap-fit ​​portion 121 on the periphery of the insulating cover 200. That is, after the first clamping body 110 and the second clamping body 120 are respectively assembled to the periphery of the insulating cover 200, the first snap-fit ​​portion 111 and the second snap-fit ​​portion 121 are then engaged with each other.

[0087] In this way, when assembling the yoke clamp 100 and the insulating cover 200, one of the first clamp body 110 and the second clamp body 120 is first assembled onto one side of the insulating cover 200. Then, the other of the first clamp body 110 and the second clamp body 120 is slipped onto the other side of the insulating cover 200 from top to bottom. This avoids interference between the yoke clamp 100 and the insulating cover 200, facilitates the assembly of the yoke clamp 100, and eliminates the need for local thinning of the yoke clamp 100. This simplifies the assembly process of the yoke clamp 100 while ensuring its structural strength.

[0088] See Figures 1 to 5 In one embodiment, the first snap-fit ​​portion 111 and the second snap-fit ​​portion 121 are snap-fitted together along the height direction of the insulating cover 200. That is, the first snap-fit ​​portion 111 and the second snap-fit ​​portion 121 can be assembled along the height direction (vertical direction) so that the first snap-fit ​​portion 111 and the second snap-fit ​​portion 121 are snap-fitted together along the height direction.

[0089] In this way, when assembling the yoke clamp 100 and the insulating cover 200, one of the first clamp body 110 and the second clamp body 120 can be assembled onto one side of the insulating cover 200 first, and then the other of the first clamp body 110 and the second clamp body 120 can be fitted onto the other side of the insulating cover 200 from top to bottom, so as to facilitate the assembly of the yoke clamp 100.

[0090] See Figures 1 to 5 In the first embodiment of this application, there is one first clamping body 110 and one second clamping body 120. Both the first clamping body 110 and the second clamping body 120 are U-shaped. When the first clamping body 110 and the second clamping body 120 are assembled, they are positioned opposite each other along their length, with the U-shaped open ends of the first clamping body 110 and the U-shaped closed ends moving away from each other. The first clamping body 110 and the second clamping body 120 are connected to form a ring structure with the yoke clamp 100. Thus, the ring-shaped yoke clamp 100 can be arranged around the periphery of the insulating cover 200.

[0091] In the second embodiment of this application, the yoke clamp 100 further includes at least one third clamp body. The third clamp body has a first snap-fit ​​portion 111 and a second snap-fit ​​portion 121. The first clamp body 110 and the second clamp body 120 are connected by at least one third clamp body to form an annular structure and surround the periphery of the insulating cover 200. The first clamp body 110, the second clamp body 120 and the at least one third clamp body are snap-fit ​​connected by the first snap-fit ​​portion 111 and the second snap-fit ​​portion 121.

[0092] That is, the yoke clamp 100 includes a first clamping body 110, a second clamping body 120, and at least one third clamping body. In other words, the number of clamping bodies in the yoke clamp 100 is not limited to two; it can also be three or even four. These three or four clamping bodies are connected to the insulating cover 200 via a first snap-fit ​​portion 111 and a second snap-fit ​​portion 121. It is understood that the shapes of the clamping bodies can be the same or different; for example, the clamping bodies can be in the shape of a straight line, an L-shape, a U-shape, etc., as long as the clamping bodies can form a ring around the insulating cover 200 and are connected via the first snap-fit ​​portion 111 and the second snap-fit ​​portion 121.

[0093] Thus, in the first embodiment, the first clamp body 110 and the second clamp body 120 are directly connected to form a ring structure. In the second embodiment, the first clamp body 110 and the second clamp body 120 are indirectly connected to form a ring structure through at least one third clamp body. The ring-shaped yoke clamp 100 can be arranged around the periphery of the insulating cover 200 to prevent the yoke clamp 100 from loosening and affecting the assembly effect of the high-voltage DC relay 10.

[0094] See Figures 3 to 6 In one embodiment, after the first clamping body 110 and the second clamping body 120 are connected, a preset gap exists between the first clamping body 110 and the second clamping body 120. After the first clamping body 110 and the second clamping body 120 are connected through the first snap-fit ​​part 111 and the second snap-fit ​​part 121, the first snap-fit ​​part 111 and the second snap-fit ​​part 121 are located in the preset gap and are snap-fitted together in the preset gap.

[0095] The pre-set gap can accommodate the first snap-fit ​​part 111 and the second snap-fit ​​part 121, providing space for their engagement. Thus, the first snap-fit ​​part 111 and the second snap-fit ​​part 121 are snapped together in the pre-set gap, eliminating the need for pre-assembly of the first clamp body 110 and the second clamp body 120, facilitating the assembly of the yoke clamp 100 and the insulating cover 200.

[0096] See Figures 3 to 10In one embodiment, the first snap-fit ​​portion 111 includes a first hook portion 1111, and the second snap-fit ​​portion 121 includes a second hook portion 1211. The first hook portion 1111 and the second hook portion 1211 have different orientations, and the first hook portion 1111 and the second hook portion 1211 can be snap-fitted together. Figure 7 for Figure 4 A schematic diagram of the first clamp body 110 in the yoke clamp 100 shown. Figure 8 for Figure 7 The enlarged view of the first clamping body 110 at point B is shown. Figure 9 for Figure 4 A schematic diagram of the second clamp body 120 in the yoke clamp 100 shown. Figure 10 for Figure 9 A magnified view of the second clamping body 120 at point C.

[0097] The first latching portion 111 includes at least a first hook portion 1111, and the second latching portion 121 includes at least a second hook portion 1211. The first hook portion 1111 protrudes from the first end of the first clamping body 110 facing the second clamping body 120, and the second hook portion 1211 protrudes from the end of the second clamping body 120 facing the first clamping body 110. Furthermore, the first hook portion 1111 and the second hook portion 1211 have different orientations, that is, the extension directions of the first hook portion 1111 and the second hook portion 1211 are different.

[0098] Thus, because the first hook 1111 and the second hook 1211 have different orientations, one of the first clamping body 110 and the second clamping body 120 can be assembled first, and the other can be assembled from top to bottom. In this way, after the first clamping body 110 and the second clamping body 120 are assembled onto the insulating cover 200, the first hook 1111 and the second hook 1211 can hook each other, so that the first snap-fit ​​part 111 and the second snap-fit ​​part 121 are snapped together, thereby achieving a reliable connection between the first clamping body 110 and the second clamping body 120 and preventing the first clamping body 110 and the second clamping body 120 from becoming loose.

[0099] See Figures 3 to 8 In one embodiment, the first latching portion 111 further includes a first connecting arm 1112, which is disposed on the first clamping body 110 and extends toward the second clamping body 120. A first hook portion 1111 protrudes from the end of the first connecting arm 1112 away from the first clamping body 110. The first hook portion 1111, the first connecting arm 1112, and the first clamping body 110 form a first space 1113 for accommodating the second hook portion 1211.

[0100] The first connecting arm 1112 is a support component for the first snap-fit ​​portion 111. The first connecting arm 1112 extends along its length. One end of the first connecting arm 1112 is located at the end of the first clamping body 110 facing the second clamping body 120, and the other end of the first connecting arm 1112 extends towards the second clamping body 120. That is, the first connecting arm 1112 extends out relative to the first clamping body 110. The first hook portion 1111 protrudes from the end of the first connecting arm 1112 away from the first clamping body 110.

[0101] Furthermore, the first hook portion 1111 protrudes from the surface of the first connecting arm 1112, and the end faces of the first hook portion 1111, the first connecting arm 1112, and the first clamping body 110 can form a first space 1113. After the first clamping body 110 is connected to the second clamping body 120, the first hook portion 1111 can hook the second hook portion 1211, so that the second hook portion 1211 is located in the first space 1113. At this time, the first hook portion 1111 can limit the second hook portion 1211 to prevent the second hook portion 1211 from detaching from the first hook portion 1111, thereby preventing the first clamping body 110 from becoming detached from the second clamping body 120.

[0102] See Figures 3 to 6 , Figure 9 and Figure 10 In one embodiment, the second latching portion 121 further includes a second connecting arm 1212, which is disposed on the second clamping body 120 and extends toward the second clamping body 120. A second hook portion 1211 protrudes from the end of the second connecting arm 1212 away from the second clamping body 120. The second hook portion 1211, the second connecting arm 1212, and the second clamping body 120 form a second space 1213 for accommodating the first hook portion 1111.

[0103] The second connecting arm 1212 is a support component for the second latching part 121. The second connecting arm 1212 extends along its length. One end of the second connecting arm 1212 is located at the end of the second clamping body 120 facing the first clamping body 110, and the other end of the second connecting arm 1212 extends towards the first clamping body 110. That is, the second connecting arm 1212 extends out relative to the second clamping body 120. The second hook part 1211 protrudes from the end of the second connecting arm 1212 away from the second clamping body 120.

[0104] Furthermore, the second hook portion 1211 protrudes from the surface of the second connecting arm 1212, and the end faces of the second hook portion 1211, the second connecting arm 1212, and the second clamping body 120 can form a second space 1213. After the second clamping body 120 is connected to the first hook portion 1111, the second hook portion 1211 can hook the first hook portion 1111 so that the first hook portion 1111 is located in the second space 1213. At this time, the second hook portion 1211 can limit the first hook portion 1111 to prevent the first hook portion 1111 from detaching from the second hook portion 1211, thereby preventing the first clamping body 110 from becoming detached from the second clamping body 120.

[0105] See Figure 3 , Figure 5 and Figure 11 In one embodiment, the surface of the first hook portion 1111 facing the second hook portion 1211 has a first guide surface 1114. The first guide surface 1114 is inclined from the end of the first hook portion 1111 toward a direction away from the second hook portion 1211, for guiding the second hook portion 1211 to engage with the first hook portion 1111. Figure 11 for Figure 5 A schematic diagram of another embodiment of the yoke clamp 100 shown.

[0106] The surface of the first hook portion 1111 facing the second hook portion 1211 has an inclined first guide surface 1114, that is, the surface of the first hook portion 1111 facing the first clamping body 110 has an inclined first guide surface 1114. Along the height direction, the distance between the first guide surface 1114 and the first clamping body 110 gradually decreases, so that the first guide surface 1114 can play a guiding installation role.

[0107] In this way, when the second hook 1211 is installed on the first hook 1111, the second hook 1211 can contact the first guide surface 1114 and gradually move into the first space 1113 along the first guide surface 1114, which facilitates the second hook 1211 and the first hook 1111 to snap together, thereby facilitating the assembly and connection of the first clamping body 110 and the second clamping body 120.

[0108] Optionally, the first guide surface 1114 is an arc-shaped surface. In this way, the arc-shaped first guide surface 1114 can guide the second hook portion 1211 into the first space 1113. Of course, in other embodiments of this application, the first guide surface 1114 may also be an inclined plane.

[0109] participate Figure 3 , Figure 5 and Figure 11In one embodiment, the surface of the second hook portion 1211 facing the first hook portion 1111 has a second guide surface 1214. The second guide surface 1214 is inclined from the end of the second hook portion 1211 toward a direction away from the first hook portion 1111, for guiding the first hook portion 1111 and the second hook portion 1211 to engage and connect.

[0110] The surface of the second hook portion 1211 facing the first hook portion 1111 has an inclined second guide surface 1214, that is, the surface of the second hook portion 1211 facing the second clamping body 120 has an inclined second guide surface 1214. Along the height direction, the distance between the second guide surface 1214 and the second clamping body 120 gradually decreases, so that the second guide surface 1214 can play a guiding installation role.

[0111] In this way, when the first hook 1111 is installed onto the second hook 1211, the first hook 1111 can contact the second guide surface 1214 and gradually move into the second space 1213 along the second guide surface 1214, which facilitates the snap-fit ​​connection between the first hook 1111 and the second hook 1211, thereby facilitating the assembly connection between the first clamping body 110 and the second clamping body 120.

[0112] Optionally, the second guide surface 1214 is an arc-shaped surface. In this way, the arc-shaped second guide surface 1214 can guide the first hook portion 1111 into the second space 1213. Of course, in other embodiments of this application, the second guide surface 1214 may also be an inclined plane.

[0113] See Figures 3 to 11 In one embodiment of this application, one of the first hook portion 1111 and the second hook portion 1211 extends toward the stationary contact 300 in the high-voltage DC relay 10, while the other extends away from the stationary contact 300. That is, one of the first hook portion 1111 and the second hook portion 1211 extends upward, while the other extends downward.

[0114] See Figures 3 to 11 In this embodiment, in the first snap-fit ​​portion 111, the first hook portion 1111 extends upward, and in the second snap-fit ​​portion 121, the second hook portion 1211 extends downward. Thus, after the first clamping body 110 is assembled, the first hook portion 1111 extends upward, and when the second clamping body 120 is installed, the second hook portion 1211 directly aligns downward with the first space 1113 of the first hook portion 1111. Therefore, after the second clamping body 120 is assembled, the second hook portion 1211 directly snaps into and connects with the first hook portion 1111.

[0115] Of course, in other embodiments of this application, the first hook portion 1111 may extend downward and the second hook portion 1211 may extend upward in the first snap-fit ​​portion 111. Similarly, the second clamping body 120 may be assembled first, and then the first clamping body 110 may be installed.

[0116] In another embodiment of this application, one of the first hook portion 1111 and the second hook portion 1211 extends toward or away from the insulating cover 200, while the other extends toward or away from the stationary contact 300 in the high-voltage DC relay 10. That is, one of the first hook portion 1111 and the second hook portion 1211 extends toward the inside (towards the insulating cover 200) or the outside (away from the insulating cover 200), while the other extends upward or downward.

[0117] For example, in the first snap-fit ​​portion 111, the first hook portion 1111 extends toward the insulating cover 200, and in the second snap-fit ​​portion 121, the second hook portion 1211 extends downward. Thus, after the first clamp body 110 is assembled, the first hook portion 1111 extends inward, and when the second clamp body 120 is installed, the second hook portion 1211 directly aligns downward with the first space 1113 of the first hook portion 1111. Therefore, after the second clamp body 120 is assembled, the second hook portion 1211 directly snaps into contact with the first hook portion 1111.

[0118] Of course, in other embodiments of this application, the first hook 1111 may extend inward or outward, and the second hook 1211 may extend upward, or the first hook 1111 may extend upward or downward, and the second hook 1211 may extend inward or outward. In this way, the first snap-fit ​​part 111 and the second snap-fit ​​part 121 can also be snap-fitted together.

[0119] See Figure 4 , Figure 7 and Figure 9 In one embodiment, the first clamping body 110 includes two first snap-fit ​​portions 111, and the second clamping body 120 includes two second snap-fit ​​portions 121. The two second snap-fit ​​portions 121 are respectively snap-fitted to the corresponding two first snap-fit ​​portions 111. That is, the first snap-fit ​​portions 111 are located on both sides of the U-shaped first clamping body 110, and the second snap-fit ​​portions 121 are located on both sides of the U-shaped second clamping body 120. When the first clamping body 110 and the second clamping body 120 are connected, the two first snap-fit ​​portions 111 are respectively snap-fitted to the corresponding second snap-fit ​​portions 121. This improves the reliability of the connection between the first clamping body 110 and the second clamping body 120.

[0120] See Figure 4 , Figure 7 and Figure 9In one embodiment, two first locking portions 111 are symmetrically arranged, and two second locking portions 121 are symmetrically arranged. In this way, by engaging and connecting the symmetrically arranged first locking portions 111 and the symmetrically arranged second locking portions 121, the force between the first clamping body 110 and the second clamping body 120 can be evenly distributed, further improving the reliability of the connection between the first clamping body 110 and the second clamping body 120.

[0121] In one embodiment, the first latching portion 111 and the first clamping body 110 are integrally formed. It is understood that the first clamping body 110 is formed by stamping, and thus the first latching portion 111 and the first clamping body 110 can be integrally formed by stamping. This improves the structural strength of the first clamping body 110, prevents the first latching portion 111 from breaking, and simplifies the processing steps.

[0122] In one embodiment, the second latching portion 121 and the second clamping body 120 are integrally formed. It is understood that the second clamping body 120 is formed by stamping, and thus the second latching portion 121 and the second clamping body 120 can be integrally formed by stamping. This improves the structural strength of the second clamping body 120, prevents the second latching portion 121 from breaking, and simplifies the processing steps.

[0123] See Figure 4 and Figure 7 In one embodiment, the first clamping body 110 includes a first end plate 112 and two first side plates 113. The two first side plates 113 are disposed opposite to the first end plate 112 to form a U-shaped first clamping body 110. The first snap-fit ​​portion 111 is disposed at the end of the first side plate 113 away from the first end plate 112.

[0124] The first end plate 112 extends in the width direction, and two first side plates 113 are disposed opposite each other on the first end plate 112 in the width direction to form a U-shaped first clamping body 110. The first snap-fit ​​portion 111 is disposed on the side of the first side plate 113 away from the first end plate 112 and extends toward the second clamping body 120.

[0125] Furthermore, each of the first side plates 113 is provided with a first snap-fit ​​portion 111. The first end plate 112, the first side plates 113, and the first snap-fit ​​portions 111 are formed by integral stamping. This ensures the structural strength of the first clamping body 110, prevents breakage at the connection points, and simplifies the manufacturing process.

[0126] See Figure 4 and Figure 9In one embodiment, the second clamping body 120 includes a second end plate 122 and two second side plates 123. The two second side plates 123 are disposed opposite to the second end plate 122 to form a U-shaped second clamping body 120. The second snap-fit ​​portion 121 is disposed at the end of the second side plate 123 away from the second end plate 122.

[0127] The second end plate 122 extends in the width direction, and two second side plates 123 are disposed opposite each other on the second end plate 122 in the width direction to form a U-shaped second clamping body 120. The second snap-fit ​​portion 121 is disposed on the side of the second side plate 123 away from the second end plate 122 and extends toward the first clamping body 110.

[0128] Furthermore, each of the second side plates 123 is provided with a second snap-fit ​​portion 121. The second end plate 122, the second side plates 123, and the second snap-fit ​​portions 121 are formed by integral stamping. This ensures the structural strength of the second clamping body 120, prevents breakage at the connection point, and simplifies the manufacturing process.

[0129] See Figures 1 to 4 , Figure 7 and Figure 9 In one embodiment, both the first clamp body 110 and the second clamp body 120 have a limiting protrusion 114 protruding toward the insulating cover 200. The limiting protrusion 114 protrudes toward the insulating cover 200 and is used to limit the permanent magnet 400 in the high voltage DC relay 10.

[0130] In other words, the first clamping body 110 is provided with a limiting protrusion 114 on the first side plate 113, and the second clamping body 120 is provided with a limiting protrusion 114 on the second side plate 123. The limiting protrusion 114 can limit the permanent magnet 400 between the yoke clamp 100 and the insulating cover 200, so as to prevent the position of the permanent magnet 400 from shifting.

[0131] Meanwhile, the limiting protrusions 114 on the first clamping body 110 and the second clamping body 120 can be formed by stamping. That is, during the stamping process of the first clamping body 110 and the second clamping body 120, the limiting protrusions 114 can be stamped on the first clamping body 110 and the second clamping body 120 at the same time, so as to simplify the processing steps and facilitate the forming process.

[0132] See Figures 1 to 4 , Figure 7 and Figure 9 In one embodiment, one end of the first clamping body 110 and the second clamping body 120 has a protruding first fixing protrusion 115, which is used to hold the housing of the high voltage DC relay 10.

[0133] In other words, both the first clamping body 110 and the second clamping body 120 have a protruding first fixing protrusion 115 on their tops. The first clamping body 110 has a protruding first fixing protrusion 115 on the top of the first side plate 113, and the second clamping body 120 has a first fixing protrusion 115 on the top of the second side plate 123.

[0134] Understandably, the high-voltage DC relay 10 has a housing, and all components of the high-voltage DC relay 10 are housed within the housing. When the yoke clamp 100 is assembled with the housing, the yoke clamp 100 is positioned and assembled with the housing through the first fixing protrusion 115 on the first clamp body 110 and the second clamp body 120, so as to ensure the accuracy of the assembly between the yoke clamp 100 and the housing.

[0135] Meanwhile, the first fixing protrusion 115 on the first clamping body 110 and the second clamping body 120 can be formed by stamping. That is, during the stamping process of the first clamping body 110 and the second clamping body 120, the first fixing protrusion 115 can be stamped on the top of the first clamping body 110 and the second clamping body 120 at the same time, so as to simplify the processing steps and facilitate the forming process.

[0136] See Figures 1 to 4 , Figure 7 and Figure 9 In one embodiment, the other end of both the first clamping body 110 and the second clamping body 120 has a protruding second fixing protrusion 116, which is used to abut against the yoke plate 600 of the high voltage DC relay 10.

[0137] In other words, both the first clamping body 110 and the second clamping body 120 have protruding second fixing protrusions 116 at their bottoms. The first clamping body 110 has a protruding second fixing protrusion 116 at the bottom of the first side plate 113, and the second clamping body 120 has a second fixing protrusion 116 at the bottom of the second side plate 123.

[0138] Understandably, the high-voltage DC relay 10 also includes a yoke plate 600, such as... Figure 1 As shown, the yoke plate 600 is disposed below the yoke clamp 100 and above the electromagnetic drive structure 500. The yoke clamp 100 is mounted on the yoke plate 600, and the yoke clamp 100 abuts against the yoke plate 600 through the second fixing protrusion 116 at the bottom of the first clamp body 110 and the second clamp body 120, ensuring the stability of the yoke clamp 100 relative to the yoke plate 600.

[0139] Meanwhile, the second fixing protrusion 116 at the bottom of the first clamping body 110 and the second clamping body 120 can be formed by stamping. That is, during the stamping process of the first clamping body 110 and the second clamping body 120, the second fixing protrusion 116 can be stamped at the bottom of the first clamping body 110 and the second clamping body 120 at the same time, so as to simplify the processing steps and facilitate the forming process.

[0140] The yoke clamp 100 of this application has a first latching portion 111 extending out at one end of the first clamping body 110 facing the second clamping body 120, and a second latching portion 121 extending out at one end of the second clamping body 120 facing the first clamping body 110. The latching connection between the first latching portion 111 and the second latching portion 121 achieves a reliable connection between the first clamping body 110 and the second clamping body 120. Thus, even if the internal parts of the high-voltage DC relay 10 shake during displacement, the latching connection between the first latching portion 111 and the second latching portion 121 prevents the first clamping body 110 from becoming loose, ensuring the performance of the yoke clamp 100.

[0141] Meanwhile, since the first snap-fit ​​part 111 and the second snap-fit ​​part 121 are extended, when assembling the first clamp body 110 and the second clamp body 120, one of them can be installed on the outside of the insulating cover 200 first, and then the other can be installed on the outside of the insulating cover 200. Then the first snap-fit ​​part 111 and the second snap-fit ​​part 121 are snapped together, which simplifies the assembly process and facilitates the assembly of the yoke clamp 100 and the insulating cover 200.

[0142] See Figures 1 to 3 This application also provides a high-voltage DC relay 10, including the yoke clamp 100 as described in any of the above embodiments. When the high-voltage DC relay 10 of this application adopts the yoke clamp 100 of the above embodiments, even if the internal parts shake during displacement, the snap-fit ​​connection between the first snap-fit ​​portion 111 and the second snap-fit ​​portion 121 ensures that the first clamp body 110 and the second clamp body 120 will not loosen, thus guaranteeing the performance of the yoke clamp 100 and consequently ensuring the performance of the high-voltage DC relay 10.

[0143] See Figures 1 to 3 In one embodiment, the high-voltage DC relay 10 includes an insulating cover 200, a stationary contact 300, a moving contact, and a permanent magnet 400. The stationary contact 300 passes through the top of the insulating cover 200, and the moving contact is located inside the insulating cover 200 and can contact or separate from the stationary contact 300. A yoke clamp 100 surrounds the periphery of the insulating cover 200, and the permanent magnet 400 is disposed between the yoke clamp 100 and the insulating cover 200. The high-voltage DC relay 10 is turned on or off by the contact or separation of the moving contact and the stationary contact 300.

[0144] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0145] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A yoke clamp, characterized in that, The yoke clip, surrounding the insulating cover of the high-voltage DC relay, includes: The first clamping body; and Second clamp main body; The first clamping body has a first snap-fit ​​portion extending towards one end of the second clamping body, and the second clamping body has a second snap-fit ​​portion extending towards one end of the first clamping body. The first snap-fit ​​portion and the second snap-fit ​​portion are arranged opposite to each other and snap-fitted together, so that the first clamping body and the second clamping body are connected to form a ring structure and surround the periphery of the insulating cover.

2. The yoke clamp according to claim 1, characterized in that, The first clamp body and the second clamp body are able to engage and connect the first snap-fit ​​portion and the second snap-fit ​​portion around the periphery of the insulating cover; And / or, the first snap-fit ​​portion and the second snap-fit ​​portion are snap-fitted together along the height direction of the insulating cover.

3. The yoke clamp according to claim 1, characterized in that, The first snap-fit ​​portion includes a first hook portion, and the second snap-fit ​​portion includes a second hook portion. The first hook portion and the second hook portion have different orientations, and the first hook portion and the second hook portion can snap-fit ​​together.

4. The yoke clamp according to claim 3, characterized in that, The first snap-fit ​​portion further includes a first connecting arm, which is disposed on the first clamp body and extends toward the second clamp body. The first hook portion protrudes from the end of the first connecting arm away from the first clamp body, and the first hook portion, the first connecting arm and the first clamp body form a first space to accommodate the second hook portion. And / or, the second snap-fit ​​portion further includes a second connecting arm, which is disposed on the second clamp body and extends toward the second clamp body. The second hook portion protrudes from one end of the second connecting arm away from the second clamp body. The second hook portion, the second connecting arm, and the second clamp body form a second space to accommodate the first hook portion.

5. The yoke clamp according to claim 3, characterized in that, The surface of the first hook portion facing the second hook portion has a first guide surface, which is inclined from the end of the first hook portion toward a direction away from the second hook portion, for guiding the second hook portion to engage with the first hook portion. And / or, the surface of the second hook facing the first hook has a second guide surface, the second guide surface being inclined from the end of the second hook toward a direction away from the first hook, for guiding the first hook to engage with the second hook.

6. The yoke clamp according to any one of claims 3 to 5, characterized in that, One of the first hook and the second hook extends toward the stationary contact in the high-voltage DC relay, and the other extends away from the stationary contact. Alternatively, one of the first hook and the second hook may extend toward or away from the insulating cover, while the other may extend toward or away from the stationary contact in the high-voltage DC relay.

7. The yoke clamp according to any one of claims 1 to 5, characterized in that, The first clamping body includes two first snap-fit ​​parts, and the second clamping body includes two second snap-fit ​​parts, with each of the two second snap-fit ​​parts snap-fitted and connected to a corresponding first snap-fit ​​part.

8. The yoke clamp according to claim 7, characterized in that, Two first latching parts are symmetrically arranged, and two second latching parts are symmetrically arranged.

9. The yoke clamp according to any one of claims 1 to 5, characterized in that, The first snap-fit ​​portion and the first clamp body are integrally formed, and / or the second snap-fit ​​portion and the second clamp body are integrally formed; And / or, after the first clamp body is connected to the second clamp body, there is a preset gap between the first clamp body and the second clamp body, and the first snap-fit ​​part and the second snap-fit ​​part are located in the preset gap.

10. The yoke clamp according to any one of claims 1 to 5, characterized in that, The number of the first clamping body and the second clamping body is one. The first clamping body and the second clamping body are arranged in a U-shape. The first clamping body and the second clamping body are connected to form a ring structure and surround the periphery of the insulating cover. Alternatively, the yoke clamp may further include at least one third clamp body, the third clamp body having a first snap-fit ​​portion and a second snap-fit ​​portion, the first clamp body and the second clamp body being connected by at least one third clamp body to form an annular structure and surrounding the periphery of the insulating cover, the first clamp body, the second clamp body and at least one third clamp body being snap-fitted together by the first snap-fit ​​portion and the second snap-fit ​​portion.

11. The yoke clamp according to any one of claims 1 to 5, characterized in that, The first clamping body includes a first end plate and two first side plates. The two first side plates are disposed opposite to the first end plate to form a U-shaped first clamping body. The first snap-fit ​​portion is disposed at the end of the first side plate away from the first end plate. And / or, the second clamping body includes a second end plate and two second side plates, the two second side plates being disposed opposite to the second end plate to form a U-shaped second clamping body, and the second snap-fit ​​portion being disposed at the end of the second side plate away from the second end plate.

12. The yoke clamp according to any one of claims 1 to 5, characterized in that, Both the first clamp body and the second clamp body have a limiting protrusion protruding toward the insulating cover, which is used to limit the permanent magnet in the high voltage DC relay; And / or, one end of the first clamping body and the second clamping body has a protruding first fixing protrusion, which is used to lock the housing of the high voltage DC relay; And / or, both the first clamp body and the second clamp body have a protruding second fixing protrusion at the other end, the second fixing protrusion being used to abut against the yoke plate of the high voltage DC relay.

13. A high-voltage DC relay, characterized in that, Includes the yoke clamp as described in any one of claims 1 to 12.

14. The high-voltage DC relay according to claim 13, characterized in that, The high-voltage DC relay also includes at least an insulating cover, a stationary contact, a moving contact, and a permanent magnet; The stationary contact is installed on the top of the insulating cover, and the moving contact is located inside the insulating cover and can contact or separate from the stationary contact; The yoke clamp surrounds the periphery of the insulating cover, and the permanent magnet is disposed between the yoke clamp and the insulating cover.

15. The high-voltage DC relay according to claim 14, characterized in that, The insulating cover is a ceramic cover.

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