High-voltage direct-current relay and preparation method thereof

Abstract

The invention relates to a high-voltage direct-current relay and a preparation method thereof. The high-voltage direct-current relay comprises a static contact which is provided with a static contact point; the movable assembly comprises a pushing mechanism, a movable spring mechanism, an elastic element and a support, the movable spring mechanism is provided with a movable contact and elastically matched with the pushing mechanism through the elastic element, the support comprises two first supporting arms, and the two first supporting arms are located on the two opposite sides of the elastic element in the axial direction respectively; the two first support arms are connected to the pushing mechanism and are in sliding fit with the movable spring mechanism; the at least one first support arm comprises a support arm main body and a support structure, the support structure is inclined to the support arm main body, and one end, far away from the support arm main body, of the support structure is used for supporting the movable spring mechanism on a moving path far away from the static contact when the movable contact and the static contact are bounced off due to short-circuit current. The high-voltage direct-current relay has the advantages of being small in size, low in cost and high in short-circuit current and voltage resistance.

Description

Technical Field

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

[0002] High-voltage DC relays, as a new type of automatic electrical switch, can achieve normally open or normally closed states through electromagnetic holding force. Current high-voltage DC relays typically consist of an electromagnetic component, a moving component, and a stationary contact. The moving contact on the moving spring of the moving component and the stationary contact on the stationary contact together form the contact part of the high-voltage DC relay. The electromagnetic component includes a coil, an upper iron core, and a lower iron core. When the coil is energized, it magnetizes the lower iron core, causing the lower iron core to attract the upper iron core, thereby driving the moving component closer to the stationary contact until the moving contact on the moving component and the stationary contact on the stationary contact make contact, thus completing the circuit.

[0003] However, current high-voltage DC relays, when a short circuit or overload occurs, will have their moving and stationary contacts spring apart due to excessive electrodynamic repulsion, causing arcing between them and leading to relay damage. Industries using high-voltage circuits, such as the new energy sector, are increasingly demanding miniaturization and short-circuit protection for high-voltage DC relays. Summary of the Invention

[0004] Therefore, it is necessary to provide a high-voltage DC relay and its manufacturing method to address the problem that high-voltage DC relays are easily damaged by arcing between the moving and stationary contacts during short circuits and overloads.

[0005] A high-voltage DC relay, comprising:

[0006] The stationary contact is equipped with a stationary contact point;

[0007] The moving component includes a pushing mechanism, a moving spring mechanism, an elastic element, and a bracket. The moving spring mechanism has a moving contact opposite to the stationary contact. The moving spring mechanism is elastically engaged with the pushing mechanism through the elastic element. The bracket includes two first arms, which are located on opposite sides of the elastic element in the axial direction. Both first arms are connected to the pushing mechanism and are slidably engaged with the moving spring mechanism.

[0008] At least one of the first arms includes an arm body and a support structure connected to the arm body on the side facing the moving spring mechanism. The support structure is inclined to the arm body. When the moving contact and the stationary contact spring apart under the action of a short-circuit current, the end of the support structure away from the arm body is used to support the moving spring mechanism on the path in which the moving spring mechanism moves away from the stationary contact.

[0009] In the aforementioned high-voltage DC relay, when the circuit connected to the high-voltage DC relay is short-circuited or overloaded, causing the moving contact of the moving spring mechanism and the stationary contact of the stationary contact to spring apart due to electro-repulsive force, the moving spring mechanism can first compress the elastic element until the support structure supports the moving spring mechanism to prevent the moving spring mechanism from continuing to approach the pushing mechanism. Since the electro-repulsive force between the moving and stationary contacts disappears after they spring apart, the elastic element can effectively buffer the kinetic energy of the moving spring mechanism as it moves away from the stationary contact until it comes into contact with the support structure. Furthermore, due to the supporting effect of the support structure, the elastic element will not be compressed to its maximum compression length. This ensures that when the support structure supports the moving spring mechanism, the impact of the moving spring mechanism on the pushing mechanism is not excessive, preventing the moving component from detaching from the stationary contact and damaging the high-voltage DC relay due to excessive impact.

[0010] Furthermore, the supporting structure's support for the moving spring mechanism prevents it from moving further away from the stationary contact, thus reducing the relative spring-off distance between the moving and stationary contacts. Combined with the buffering effect of the elastic element to prevent the moving component from detaching from the stationary contact, the distance between the moving and stationary contacts is kept within acceptable limits. This helps prevent excessive heat generation from arcing between the moving and stationary contacts, which could damage or even explode the high-voltage DC relay. Additionally, the buffering effect of the elastic element on the moving spring mechanism reduces the holding force required by the moving component on the electromagnetic component. This allows the electromagnetic component to support the entire moving component with less holding force, reducing the number of coil turns and / or the core size of the electromagnetic component, thus facilitating the miniaturization design of the high-voltage DC relay. Furthermore, by using a support structure that is inclined relative to the main body of the support arm to support the moving spring mechanism, when the support structure is inclined relative to the main body of the support arm toward the moving spring mechanism in the direction perpendicular to the pushing mechanism, it can shorten the distance between the end of the support structure away from the main body of the support arm and the moving spring mechanism without increasing the complexity of the structure and the manufacturing process. This further limits the maximum spring-off distance between the moving spring mechanism and the stationary contact, reducing the heat generated by the arcing phenomenon. When the support structure is inclined relative to the main body of the support arm toward the moving spring mechanism in the direction perpendicular to the pushing mechanism, it effectively supports the moving spring mechanism to shorten the maximum spring-off distance between the moving spring mechanism and the stationary contact. At the same time, it can also extend the buffer distance of the elastic element on the moving spring mechanism when it moves to abut against the support structure, balancing the maximum spring-off distance and the buffer distance. This helps to reduce the impact force on the electromagnetic component when the moving spring mechanism abuts against the support structure, and reduces the holding force requirement of the electromagnetic component.

[0011] In one embodiment, in the direction where the pushing mechanism is perpendicular to the moving spring mechanism, the support structure is inclined relative to the support arm body toward the side where the moving spring mechanism is located; or,

[0012] In the direction perpendicular to the pushing mechanism, the support structure is inclined relative to the main body of the support arm toward the side where the spring mechanism is located.

[0013] In one embodiment, the support structure is integrally formed with the main body of the support arm, and the support structure is formed by bending a portion of the bracket relative to the main body of the support arm.

[0014] In one embodiment, the tilt angle of the support structure relative to the main body of the support arm is adjustable.

[0015] In one embodiment, the support arm body has a through hole that penetrates the support arm body. The through hole has a first sidewall and a second sidewall that are opposite each other. The first sidewall and the second sidewall are arranged sequentially in the direction in which the pushing mechanism points to the moving spring mechanism. The support structure is connected to the first sidewall or the second sidewall.

[0016] In one embodiment, the elastic element is disposed between the pushing mechanism and the moving spring mechanism, and its two ends abut against the moving spring mechanism and the pushing mechanism, respectively.

[0017] In one embodiment, the support structure is located between the moving spring mechanism and the pushing mechanism, and is spaced apart from the moving spring mechanism and the pushing mechanism.

[0018] In one embodiment, the moving spring mechanism includes a relatively fixed lower armature and a moving spring, the moving contact being located on the side of the moving spring facing the stationary contact, wherein the support structure is used to support one end of the moving spring mechanism facing either the lower armature or the moving spring.

[0019] In one embodiment, the high-voltage DC relay further includes an upper armature opposite to the lower armature. When the moving contact and the stationary contact are in contact, the upper armature and the lower armature can be magnetized and attract each other. The upper armature is disposed on the bracket, or the upper armature is disposed outside the moving component and fixed relative to the stationary contact.

[0020] In one embodiment, the pushing mechanism can drive the moving spring mechanism to move towards the stationary contact, so that the moving component has a first state and a second state. In the first state, the moving contact is in contact with the stationary contact. In the second state, the moving contact is pressed against the stationary contact by the elastic element. The moving spring mechanism is spaced apart from the support structure. During the transition from the first state to the second state, the pushing mechanism moves relative to the moving spring mechanism towards the stationary contact. The distance between the moving spring mechanism and the support structure is smaller in the second state than in the first state.

[0021] In one embodiment, in the second state, the difference between the length of the elastic element and the ultimate compression length of the elastic element is greater than the distance between the moving spring mechanism and the end of the support structure away from the main body of the support arm.

[0022] In one embodiment, the moving contact can spring away from the stationary contact under the electric repulsive force generated by the short-circuit current to switch from the second state to the third state. In the third state, the support structure abuts against the moving spring mechanism to prevent the moving spring mechanism and the pushing mechanism from getting close to each other, and the length of the elastic element is greater than the ultimate compression length.

[0023] In one embodiment, the high-voltage DC relay further includes an electromagnetic component, and the actuating mechanism includes a actuating seat connected to the bracket and a actuating rod connected to the actuating seat on the side opposite to the moving spring mechanism. The actuating rod is inserted into the electromagnetic component, and the electromagnetic component can drive the actuating seat to move toward or away from the stationary contact via the actuating rod.

[0024] A method for manufacturing a high-voltage DC relay, comprising:

[0025] An assembly is provided, the assembly including a pushing mechanism, a moving spring mechanism, an elastic element, and a frame to be processed. The moving spring mechanism is elastically engaged with the pushing mechanism through the elastic element. The frame to be processed includes two support arms to be processed, the two support arms to be processed are respectively located on opposite sides of the elastic element in the axial direction, and both support arms to be processed are connected to the pushing mechanism and are slidably engaged with the moving spring mechanism.

[0026] The arm to be processed is bent to form the arm body and the support structure, wherein the support structure is bent relative to the arm body toward the side where the moving spring mechanism is located.

[0027] The above-described preparation method simplifies the fabrication process of the support structure and reduces the manufacturing cost of the high-voltage DC relay. Furthermore, it allows for setting the bending angle of the support structure relative to the main support arm according to different holding forces and spring-opening distance requirements. This enables flexible setting of the distance between the end of the support structure furthest from the main support arm and the moving spring mechanism, achieving the effect of flexibly designing the maximum spring-opening distance between the moving spring mechanism and the stationary contact.

[0028] In one embodiment, after the step of bending the arm to be processed to form the arm body and the support structure, the preparation method further includes:

[0029] Adjust the bending angle of the support structure relative to the main body of the support arm to adjust the distance between the end of the support structure away from the main body of the support arm and the moving spring mechanism. Attached Figure Description

[0030] Figure 1 This is a partial cross-sectional schematic diagram of the high-voltage DC relay in its initial state in some embodiments.

[0031] Figure 2 for Figure 1 The diagram shows the structure of the driving component in the high-voltage DC relay.

[0032] Figure 3 for Figure 2 The diagram shows the structure of the moving component from another angle.

[0033] Figure 4 for Figure 2 The diagram shows an exploded view of the moving component.

[0034] Figure 5 This is a partial cross-sectional schematic diagram of the high-voltage DC relay in the first state in some embodiments.

[0035] Figure 6 This is a partial cross-sectional schematic diagram of the high-voltage DC relay in the second state in some embodiments.

[0036] Figure 7 This is a partial cross-sectional schematic diagram of the high-voltage DC relay in the third state in some embodiments.

[0037] Figure 8 This is a schematic diagram of the moving component in some other embodiments.

[0038] Figure 9 for Figure 8 The diagram shows an exploded view of the moving component.

[0039] Figure 10 This is a schematic diagram of the assembly structure in some embodiments.

[0040] Figure 11 for Figure 10 An exploded view of the assembly shown.

[0041] Figure 12 This is a structural schematic diagram of the assembly in some other embodiments.

[0042] Figure 13 for Figure 12 An exploded view of the assembly shown.

[0043] Figure label:

[0044] 10. High-voltage DC relay; 11. Yoke plate; 12. Electromagnetic assembly; 121. Upper iron core; 122. Lower iron core; 13. Moving assembly; 131. Moving spring mechanism; 1311. Moving spring; 1313. Moving contact; 1314. Lower armature; 132. Elastic element; 133. Pushing mechanism; 1331. Pushing seat; 1332. Pushing rod; 134. Fixing plate; 135. Bracket; 1351. First arm; 1354. Arm body; 1355. Through hole; 1357. Second arm; 136. Support structure; 137. First side wall; 138. Second side wall; 14. Stationary contact; 141. Stationary contact; 142. Insulating cover; 143. Upper armature; 20. Assembly; 21. Frame to be processed; 211. Arm to be processed. Detailed Implementation

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] As high-voltage DC relays are increasingly used in various fields, the industry's requirements for their heat loss resistance, short-circuit protection, and voltage are also becoming more stringent. Specifically, the current and voltage of the circuits in which high-voltage DC relays are used are increasing. For example, in new energy vehicles, as the required driving range increases, the capacity of battery packs in these vehicles is also increasing, leading to higher current and voltage requirements for the high-voltage DC relays used in the battery pack circuits. Therefore, when the circuit is short-circuited or overloaded, the electro-repulsive force generated between the moving and stationary contacts of the high-voltage DC relay is relatively large, which can easily cause the moving and stationary contacts to spring apart by a large distance. For example, the moving and stationary contacts may spring apart to the point where the moving spring mechanism compresses the elastic element to its limit, and then transmit the impact force to the push base and the electromagnetic assembly. At this point, if the impact force is too large, it can easily cause the electromagnetic assembly and the moving assembly to detach from the stationary contact, resulting in damage to the high-voltage DC relay. Alternatively, if the distance between the moving and stationary contacts is too far, the arcing phenomenon between the moving and stationary contacts will generate excessive heat, burning out the high-voltage DC relay, or even causing the high-voltage DC relay to explode. However, in traditional high-voltage DC relays, to increase the holding force of the electromagnetic assembly on the moving assembly to prevent insufficient holding force from causing the electromagnetic assembly to detach from the stationary contact or to reduce the spring distance between the moving and stationary contacts, it is usually necessary to increase the number of turns of the coil winding, which increases the cost and size of the electromagnetic assembly, thus increasing the size and cost of the high-voltage DC relay.

[0052] To address the aforementioned problems, this application provides a high-voltage DC relay and its manufacturing method.

[0053] Please see Figures 1-4 As shown, Figure 1 This paper shows a schematic diagram of the structure of the high-voltage DC relay 10 in its initial state in some embodiments of this application. Figure 2 and Figure 3 Schematic diagrams of the moving component 13 at different angles are shown in some embodiments. Figure 4An exploded view of the moving component 13 in some embodiments is shown. In some embodiments, the high-voltage DC relay 10 includes a yoke plate 11, an electromagnetic component 12, a moving component 13, stationary contacts 14, and an insulating cover 142. The insulating cover 142 is disposed on the yoke plate 11, and the stationary contacts 14 are disposed on the insulating cover 142. There may be two stationary contacts 14, each with a stationary contact point 141. The moving component 13 includes a moving spring mechanism 131, an elastic element 132, and a pushing mechanism 133. The moving spring mechanism 131 has two moving contacts 1313 opposite to the two stationary contacts 141. The moving spring mechanism 131 is elastically connected to the pushing mechanism 133 through the elastic element 132. The electromagnetic component 12 is located on the side of the yoke plate 11 facing away from the moving spring mechanism 131. It can drive the pushing mechanism 133 to move, causing the moving component 13 as a whole to move towards or away from the stationary contact 141, so that the moving contact 1313 contacts the stationary contact 141 to realize the circuit is connected, or the moving contact 1313 disengages from the stationary contact 141 to realize the circuit is disconnected.

[0054] It is understood that the high-voltage DC relay 10 can be used as a switching element in a circuit. The stationary contact 14 may have a lead-out terminal electrically connected to the two stationary contacts 141, and the lead-out terminal is electrically connected to the circuit. When the moving contact 1313 and the stationary contact 141 are in contact, the moving contact 1313 conducts the two stationary contacts 141 to make the circuit conduct, and the high-voltage DC relay 10 is turned on. When the moving contact 1313 is disengaged from the stationary contact 141, the two stationary contacts 141 are electrically isolated, the circuit is broken, and the high-voltage DC relay 10 is turned off. In some embodiments, the high-voltage DC relay 10 may also include a housing (not shown) covering the insulating cover 142 and the stationary contact 14. The stationary contact 14 can be led out to the outside of the housing through conductive structures such as electrodes and leads to be electrically connected to the circuit. The material of the housing includes, but is not limited to, insulating materials such as plastic. The housing can isolate the stationary contact 14, the insulating cover 142 and the moving component 13 from the outside world to achieve insulation protection.

[0055] In some embodiments, the pushing mechanism 133 includes a pushing seat 1331 and a pushing rod 1332 connected to the side of the pushing seat 1331 facing away from the moving spring mechanism 131. The electromagnetic assembly 12 may include an upper iron core 121, a lower iron core 122, and a coil arranged around the upper iron core 121 and the lower iron core 122. The upper iron core 121 is fixedly disposed on the yoke plate 11, and the coil is fixed relative to the yoke plate 11. The lower iron core 122 is opposite to the upper iron core 121 and can move relative to the yoke plate 11 in a direction closer to or away from the upper iron core 121. The pushing rod 1332 passes through the upper iron core 121 and is inserted into the lower iron core 122. The pushing rod 1332 is slidably engaged with the upper iron core 121 and is fixed relative to the lower iron core 122. When the coil is energized, it can magnetize the upper iron core 121 and the lower iron core 122, causing the upper iron core 121 and the lower iron core 122 to attract each other and drive the lower iron core 122 to move closer to the upper iron core 121, thereby driving the push rod 1332 to drive the entire moving assembly 13 to move closer to the stationary contact 141.

[0056] In some embodiments, the moving assembly 13 further includes a bracket 135, which is connected to the push seat 1331 and slidably engages with the moving spring mechanism 131. For example, the bracket 135 may include two first arms 1351 and one second arm 1357. The two first arms 1351 are located on opposite sides of the elastic element 132 and the moving spring mechanism 131 in the axial direction, and are both directly or indirectly connected to the push seat 1331. The two ends of the second arm 1357 are respectively connected to the two first arms 1351 and are located on the side of the moving assembly 13 opposite to the push seat 1331. Two first arms 1351 slide in cooperation with the moving spring mechanism 131 on opposite sides of the moving spring mechanism 131, allowing the moving spring mechanism 131 to move relative to the push seat 1331 in a direction closer to or further away from the stationary contact 141. When the moving spring mechanism 131 and the push seat 1331 are relatively close, the moving spring mechanism 131 and the push seat 1331 can compress the elastic element 132, causing the elastic element 132 to undergo elastic deformation. The sliding limit of the two first arms 1351 on the moving spring mechanism 131 can guide the movement of the moving spring mechanism 131 relative to the push seat 1331, improving the performance stability of the high-voltage DC relay 10. The second arm 1357 can limit the extreme position of the moving spring mechanism 131 away from the push seat 1331 on the side of the moving spring mechanism 131 facing the stationary contact 141, preventing the moving spring mechanism 131 from disengaging from the elastic element 132 and the push seat 1331, thus improving the performance stability of the high-voltage DC relay 10.

[0057] Further, in some embodiments, at least one first arm 1351 includes an arm body 1354 and a support structure 136 connected to the arm body 1354 on the side facing the moving spring mechanism 131. In the direction perpendicular to the moving spring mechanism 131 from the push seat 1331, the support structure 136 is inclined away from the moving spring mechanism 131. That is, in the direction perpendicular to the moving spring mechanism 131 from the push seat 1331, the distance between the support structure 136 and the moving spring mechanism 131 gradually increases. The end of the support structure 136 away from the arm body 1354 is opposite to the moving spring mechanism 131 and is used to support the moving spring mechanism 131 as it moves away from the stationary contact 141 when the moving contact 1313 and the stationary contact 141 spring open under the action of a short-circuit current, preventing the moving spring mechanism 131 from continuing to approach the push seat 1331. In the accompanying drawings of this application, it is taken that both first arms 1351 are provided with support structures 136 as an example. In some embodiments, the moving spring mechanism 131 moves in the same direction away from the stationary contact 14 as it moves towards the push seat 1331.

[0058] It should be noted that in this application, the state in which the moving contact 1313 and the stationary contact 141 are spaced apart, and the electromagnetic component 12 does not apply force to the push rod 1332, i.e., the high-voltage DC relay 10 disconnects the circuit, is called the initial state. In the initial state, the support structure 136 and the moving spring mechanism 131 are spaced apart. When it is necessary to bring the moving contact 1313 and the stationary contact 141 into contact to conduct the circuit, the coil in the electromagnetic component 12 is energized, and the lower iron core 122 moves towards the upper iron core 121, which can drive the push rod 1332 to drive the push mechanism 133, and then drive the moving spring mechanism 131 towards the stationary contact 141, so that the moving component 13 has a first state and a second state. Figure 5 and Figure 6 As shown, when the moving component 13 moves to the first state, the moving contact 1313 is in contact with the stationary contact 141, and the high-voltage DC relay 10 conducts the circuit. In the first state, the length of the elastic element 132 is the same as its length in the initial state. That is to say, during the process of the pushing mechanism 133 driving the moving spring mechanism 131 to move towards the stationary contact 141 to switch from the initial state to the first state, the moving spring mechanism 131, the bracket 135, the elastic element 132, and the pushing mechanism 133 move synchronously.

[0059] After the electromagnetic component 12 drives the moving spring mechanism 131 to the first state via the pushing mechanism 133, the electromagnetic component 12 continues to drive the pushing mechanism 133 to move towards the stationary contact 141 to the second state. During the transition from the first state to the second state, since the moving contact 1313 is in contact with the stationary contact 141, the moving spring mechanism 131 and the stationary contact 141 are relatively fixed. As the pushing mechanism 133 continues to move towards the stationary contact 141, the distance between the pushing seat 1331 and the moving spring mechanism 131 decreases. In other words, during the transition from the first state to the second state, the moving spring mechanism 131 and the pushing seat 1331 are relatively close. This relative closeness between the moving spring mechanism 131 and the pushing seat 1331 will compress the elastic element 132, causing the length of the elastic element 132 to decrease and the elastic element 132 to undergo elastic deformation. Understandably, in both the first and second states, the moving contact 1313 is in contact with the stationary contact 141. In the second state, the elastic element 132 can apply an elastic force to the moving contact 1313 to press the moving spring mechanism 131 against the stationary contact 14, improving the stability and reliability of the contact between the moving contact 1313 and the stationary contact 141. Simultaneously, the elastic element 132, in conjunction with the electromagnetic component 12, can counteract the electrodynamic repulsion between the moving contact 1313 and the stationary contact 141, which helps reduce the holding force required by the high-voltage DC relay 10 for the electromagnetic component 12, and consequently reduces the cost and size of the electromagnetic component 12.

[0060] It is understandable that during the transition from the initial state to the first state, and during the transition from the first state to the second state, the lower iron core 122 gradually approaches the upper iron core 121. In the first state, the lower iron core 122 and the upper iron core 121 are spaced apart. In the second state, the lower iron core 122 can just make contact with the upper iron core 121, which is beneficial to enhance the magnetic attraction between the upper iron core 121 and the lower iron core 122 in the second state, thereby enhancing the holding force of the electromagnetic component 12 on the moving component 13.

[0061] In some embodiments, the position of the support structure 136 is designed such that, in the second state, the support structure 136 remains spaced apart from the moving spring mechanism 131, and the distance between the moving spring mechanism 131 and the support structure 136 is smaller in the second state than in the first state. Furthermore, in the second state, the distance between the support structure 136 and the push seat 1331 is greater than the ultimate compression length of the elastic element 132; that is, in the second state, the difference between the length of the elastic element 132 and its ultimate compression length is greater than the distance between the moving spring mechanism 131 and the support structure 136. In some embodiments, the length of the elastic element 132 may be equal to the distance between the moving spring mechanism 131 and the push seat 1331.

[0062] Combination Figure 7As shown, it can be understood that when the circuit is short-circuited or overloaded, taking the current exceeding 8kA as an example in this application, the electrodynamic repulsion between the moving contact 1313 and the stationary contact 141 is greater than the elastic force exerted by the elastic element 132 on the moving contact 1313. The moving contact 1313 springs away from the stationary contact 141, causing the moving spring mechanism 131 to move towards the push seat 1331 and further compress the elastic element 132 until the moving spring mechanism 131 abuts against the support structure 136. At this time, the support structure 136 provides support for the moving spring mechanism 131, preventing the moving spring mechanism 131 from moving towards the push seat 1331 relative to it. In this application, the state in which the support structure 136 abuts against the moving spring mechanism 131 to provide support for the moving spring mechanism 131 is referred to as the third state of the high voltage DC relay 10. In the third state, the moving spring mechanism 131, the bracket 135 and the push mechanism 133 are relatively fixed, and the electromagnetic component 12 bears the impact force of the moving spring mechanism 131.

[0063] It is understood that in this application, the support structure 136 only contacts the moving spring mechanism 131 in the third state to provide support. In other states, the support structure 136 will not interfere with the movement of the moving spring mechanism 131. This helps to avoid the support structure 136 causing other types of interference to the movement of the moving spring mechanism 131, such as sliding fit or limit fit, which would increase the risk of the moving spring mechanism 131 getting stuck, uneven force, or wear and scraping. While providing support, it also helps to maintain the structural reliability of the moving component 13 and reduce the impact of the support structure 136 on the contact reliability of the moving component 13.

[0064] In the aforementioned high-voltage DC relay 10, when the circuit connected to the high-voltage DC relay 10 is short-circuited or overloaded, causing the moving contact 1313 of the moving spring mechanism 131 and the stationary contact 141 of the stationary contact 14 to spring open due to electrodynamic repulsion, the moving spring mechanism 131 can first compress the elastic element 132 until the support structure 136 supports the moving spring mechanism 131 to prevent the moving spring mechanism 131 and the pushing mechanism 133 from continuing to approach each other. Since the electrodynamic repulsion between the moving contact 1313 and the stationary contact 141 disappears after the moving contact 1313 and the stationary contact 141 spring open, the elastic element 132 can effectively buffer the kinetic energy of the moving spring mechanism 131 during the process of the moving spring mechanism 131 moving away from the stationary contact 141 and abutting against the support structure 136. Furthermore, due to the supporting effect of the support structure 136, the elastic element 132 will not be compressed to its maximum compression length. This ensures that when the support structure 136 supports the moving spring mechanism 131, the impact of the moving spring mechanism 131 on the pushing mechanism 133 will not be too great, thus avoiding damage to the high-voltage DC relay 10 caused by the moving component 13 being completely separated from the stationary contact 14 due to excessive impact.

[0065] Furthermore, the supporting structure 136's support for the moving spring mechanism 131 prevents the moving spring mechanism 131 from moving further away from the stationary contact 141, which helps limit the maximum relative distance between the moving spring mechanism 131 and the stationary contact 14, reducing the relative spring-off distance between the moving contact 1313 and the stationary contact 141. Combined with the buffering of the elastic element 132 to prevent the moving component 13 from detaching from the stationary contact 14, the distance between the moving contact 1313 and the stationary contact 141 will not be too far, thus helping to avoid the arcing phenomenon between the moving contact 1313 and the stationary contact 141 generating excessive heat that could damage or even explode the high-voltage DC relay 10.

[0066] In addition, the buffering effect of the elastic element 132 on the moving spring mechanism 131 can also reduce the holding force requirement of the moving component 13 on the electromagnetic component 12, so that the electromagnetic component 12 can support the entire moving component 13 with a smaller holding force. This is beneficial to reducing the number of coil turns and / or the volume of the iron core of the electromagnetic component 12, and is beneficial to the miniaturization design of the high voltage DC relay 10.

[0067] Furthermore, by using the support structure 136, which is inclined relative to the main support arm 1354, to support the moving spring mechanism 131 at the end away from the main support arm 1354, the inclined setting can shorten the distance between the end of the support structure 136 away from the main support arm 1354 and the moving spring mechanism 131 without increasing the complexity of the structure and the manufacturing process. This further limits the maximum spring-off distance between the moving spring mechanism 131 and the stationary contact 141, and reduces the heat generated by the electric arc phenomenon.

[0068] Therefore, during the transition from the second state to the third state, the aforementioned high-voltage DC relay 10 first buffers the impact of the moving spring mechanism 131 through the elastic element 132, and then the electromagnetic component 12 bears the impact of the moving spring mechanism 131. This helps reduce the holding force required by the electromagnetic component 12, reduces its cost and size, and also reduces the spring-off distance between the moving contact 1313 and the stationary contact 141, thereby reducing the heat generated by the arcing phenomenon. The aforementioned high-voltage DC relay 10 achieves a balance between small size, low cost, and high resistance to short-circuit current and voltage. Based on this, the high-voltage DC relay 10 provided in this application can be used in circuits with high current, such as circuits with operating currents below 8kA. The high-voltage DC relay 10 includes, but is not limited to, applications in battery pack circuits of new energy vehicles. The high-voltage DC relay 10 can also be used as a switching element in circuits of any other applicable equipment, which will not be elaborated upon in this application.

[0069] It should be noted that in the embodiments shown in the accompanying drawings of this application, in the direction where the push seat 1331 is perpendicular to the moving spring mechanism 131, the support structure 136 is inclined away from the side where the moving spring mechanism 131 is located, which can shorten the distance between the support structure 136 and the moving spring mechanism 131, thereby shortening the maximum spring-off distance between the moving spring mechanism 131 and the stationary contact 141. In other embodiments, in the direction where the moving spring mechanism 131 is perpendicular to the push seat 1331, the support structure 136 is inclined away from the side where the moving spring mechanism 131 is located, that is, in the direction where the push seat 1331 is perpendicular to the moving spring mechanism 131, the distance between the support structure 136 and the moving spring mechanism 131 gradually decreases. This configuration effectively supports the moving spring mechanism 131, shortening the maximum spring-opening distance between the moving spring mechanism 131 and the stationary contact 141. It also extends the buffer distance of the elastic element 132 on the moving spring mechanism 131 when the moving spring mechanism 131 moves to abut against the support structure 136, balancing the maximum spring-opening distance and the buffer distance. This helps to reduce the impact force on the electromagnetic component 12 when the moving spring mechanism 131 abuts against the support structure 136, reduces the holding force requirement of the electromagnetic component 12, and further reduces the size and cost of the electromagnetic component 12.

[0070] In some embodiments, the elastic element 132 is disposed between the push seat 1331 and the moving spring mechanism 131, with both ends abutting against the moving spring mechanism 131 and the push seat 1331 respectively. The two ends of the elastic element 132 can be connected to the moving spring mechanism 131 and the push seat 1331 respectively. This arrangement allows for a reasonable spatial layout between the moving spring mechanism 131, the elastic element 132, and the push mechanism 133, making the structure of the moving assembly 13 more compact and improving the space utilization efficiency of the moving assembly 13. It also helps to keep the elastic element 132 relatively far away from the contact position of the moving contact 1313 and the stationary contact 141, reducing the impact of high temperature and ablation spatter on the elastic element 132, and reducing the assembly difficulty of the elastic element 132 with other components. Understandably, when the support structure 136 is located between the moving spring mechanism 131 and the push seat 1331, and is spaced apart from the moving spring mechanism 131 and the push seat 1331 in the initial state, the support structure 136 is also farther away from the contact position of the moving contact 1313 and the stationary contact 141. This also helps to reduce the impact of high temperature and ablation spatter on the support structure 136. For example, it avoids the distance between the support structure 136 and the moving spring mechanism 131 being reduced due to spatter, which would affect the switching from the second state to the third state.

[0071] Please see again. Figure 4 and Figure 5As shown, in some embodiments, the moving spring mechanism 131 includes a moving spring 1311 and a lower armature 1314 fixedly connected to the moving spring 1311. The high-voltage DC relay 10 also includes an upper armature 143 opposite to the lower armature 1314. The moving contact 1313 is located on the side of the moving spring 1311 facing the stationary contact 14. The upper armature 143 and the lower armature 1314 together form a short-circuit protection ring structure. The upper armature 143 is located on the side of the lower armature 1314 facing away from the push base 1331. The upper armature 143 can be fixed on the bracket 135 and located on the side of the moving spring 1311 facing away from the push base 1331. The upper armature 143 can also be located outside the moving assembly 13 and fixed relative to the stationary contact 14. For example, an insulating cover 142 is mounted on the moving component 13 and on the yoke plate 11. The stationary contact 14 and the upper armature 143 are both fixedly mounted on the insulating cover 142. The stationary contact 14 protrudes from the insulating cover 142, facing away from the moving spring mechanism 131, i.e., the side facing away from the stationary contact 141. When the moving contact 1313 and the stationary contact 141 come into contact, the magnetic field generated by the moving spring 1311 and the stationary contact 14 can magnetize the upper armature 143 and the lower armature 1314, so that the upper armature 143 and the lower armature 1314 attract each other. This provides a holding force for the contact between the moving contact 1313 and the stationary contact 141, which helps to reduce the holding force required by the electromagnetic component 12, and also helps to reduce the cost and size of the electromagnetic component 12.

[0072] It should be noted that when the upper armature 143 is disposed on the insulating cover 142, the upper armature 143 can be disposed corresponding to the stationary contact 141 and located between the insulating cover 142 and the moving spring 1311. In this case, the upper armature 143 can also limit the moving spring mechanism 131 on the side of the moving spring mechanism 131 facing away from the push seat 1331, limiting the moving spring mechanism 131 to the extreme position away from the push seat 1331. Therefore, when the upper armature 143 is disposed on the insulating cover 142, the support 135 of the moving assembly 13 can omit the second support arm 1357, and only two first supports 1351 are provided to connect with the push seat 1331 and are located on the two sides opposite to the moving spring mechanism 131. Of course, when the upper armature 143 is mounted on the insulating cover 142, the upper armature 143 and the moving spring 1311 can also be separated by the second arm 1357 of the bracket 135. The second arm 1357 limits the moving spring mechanism 131 to the extreme position away from the push seat 1331.

[0073] When the high-voltage DC relay 10 is equipped with a short-circuit ring structure, the end of the support structure 136 away from the first arm 1351 can be directly opposite either the lower armature 1314 or the moving spring 1311, as long as it can abut against either the lower armature 1314 or the moving spring 1311 on the path of the moving spring mechanism 131 moving towards the push seat 1331, thus providing support for the moving spring mechanism 131. When both first arms 1351 are equipped with support structures 136, the two support structures 136 can be directly opposite the moving spring 1311 and the lower armature 1314 respectively, and the two support structures 136 can simultaneously abut against the moving spring 1311 and the lower armature 1314 respectively, thereby achieving a more stable and reliable support for the moving spring mechanism 131. The two support structures 136 can also be directly opposite either the moving spring 1311 or the lower armature 1314 simultaneously. Two support structures 136 located on opposite sides of the elastic element 132 in the axial direction simultaneously provide uniform support to the moving spring mechanism 131. Combined with the guiding effect of the support arm body 1354 on the moving spring mechanism 131, this improves the stability and reliability of the movement of the moving spring mechanism 131 relative to the push seat 1331, preventing the moving spring mechanism 131 from swaying. Of course, in some embodiments, the short-circuit ring structure can be omitted, in which case the two sides of the moving spring 1311 can respectively abut against the second support arm 1357 and the elastic element 132.

[0074] It is understandable that when the upper armature 143 is mounted on the bracket 135, for example, on the second arm 1357 and located between the second arm 1357 and the movable spring 1311, the combination... Figure 5 and Figure 6 As shown, if the upper armature 143 and the lower armature 1314 are in contact in the first state, then in the second state, since the moving spring 1311 and the lower armature 1314 have moved a certain distance closer to the push seat 1331 relative to the first state, the upper armature 143 and the lower armature 1314 are spaced apart. When the upper armature 143 is located on the insulating cover 142, if the lower armature 1314 is in contact with the upper armature 143 in the first state, then in the second state, the upper armature 143 and the lower armature 1314 are also in contact. In other embodiments, the high-voltage DC relay 10 can also mount the upper armature 143 via a carrier structure additionally provided on the yoke plate 11, to fix the upper armature 143 between the insulating cover 142 and the lower armature 1314, as long as the upper armature 143 and the lower armature 1314 can attract each other in both the first and second states to provide a holding force for the contact between the moving contact 1313 and the stationary contact 141.

[0075] In this application, the sliding engagement between the first arm 1351 and the moving spring mechanism 131 can be described as follows: the opposing sides of the lower armature 1314 can be in sliding engagement with the surfaces opposite to the two first arms 1351; the opposing sides of the moving spring 1311 can be in sliding engagement with the two first arms 1351; or a portion of the moving spring 1311 or the lower armature 1314 can be inserted into and slidably disposed on the first arm 1351, as long as the first arm 1351 can provide guidance and limiting function for the movement of the moving spring mechanism 131 relative to the push seat 1331. In some embodiments, the first arm 1351 of the bracket 135 can be directly connected to the push seat 1331, and the moving component 13 can also include a fixing piece 134 connected to the first arm 1351 and the push seat 1331, thereby indirectly connecting the bracket 135 to the push seat 1331 through the fixing piece 134.

[0076] Please see again. Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the support structure 136 is integrally formed with the support arm body 1354, and the support structure 136 is formed by bending a portion of the bracket 135 relative to the support arm body 1354. This configuration can improve the connection strength between the support structure 136 and the support arm body 1354, simplify the manufacturing process of the support structure 136, and reduce manufacturing costs. In addition, by bending the support structure 136, the angle between the support structure 136 and the support arm body 1354 can be more easily controlled, thereby better controlling the distance between the support structure 136 and the moving spring mechanism 131, and limiting the maximum spring-off distance between the moving contact 1313 and the stationary contact 141. Furthermore, in some embodiments, after the moving component 13 is prepared, the tilt angle of the support structure 136 relative to the support arm body 1354 is adjustable. For example, the tilt angle of the support structure 136 relative to the support arm body 1354 can be adjusted by using tools such as a wrench, thereby flexibly adjusting the distance between the support structure 136 and the moving spring mechanism 131, so as to achieve the effect of adjusting the maximum spring-opening distance of the moving contact 1313 and the stationary contact 141 according to different support requirements.

[0077] In some embodiments, the support arm body 1354 has a through hole 1355 extending through the support arm body 1354. The through hole 1355 has opposing first sidewalls 137 and second sidewalls 138, which are sequentially arranged in the direction from the pushing mechanism 133 to the moving spring mechanism 131. (Reference) Figures 2-4 As shown, in some embodiments, the support structure 136 is connected to the first sidewall 137, as referenced. Figure 8 and Figure 9As shown, in some embodiments, the support structure 136 is connected to the second sidewall 138. It is understood that when the support structure 136 is not bent, the portion forming the support structure 136 can be located within the through hole 1355. The support structure 136 can be formed by bending this portion relative to the other portions. When the support structure 136 is connected to the first sidewall 137, the distance between the support structure 136 and the moving spring mechanism 131 can be extended, thereby extending the maximum spring-off distance between the moving contact 1313 and the stationary contact 141. When the support structure 136 is connected to the second sidewall 138, the distance between the support structure 136 and the moving spring mechanism 131 is shortened, thereby shortening the maximum spring-off distance between the moving contact 1313 and the stationary contact 141. The specific arrangement of the support structure 136 can be designed according to the support requirements.

[0078] In some embodiments, when the high-voltage DC relay 10 is provided with a short-circuit ring structure, the lower armature 1314 can be connected to the middle of the moving spring 1311. The two ends of the moving spring 1311 located outside the lower armature 1314 form moving contacts 1313. The support structure 136 can be opposite to the lower armature 1314, which is beneficial to adapt to the position layout of the lower armature 1314 and the first support arm 1351 and reduce the manufacturing difficulty of the support structure 136.

[0079] It is understandable that when the support structure 136 and the arm body 1354 are integrally formed, the first arm 1351 can be made of any suitable metal material. Thus, the support structure 136 and the arm body 1354 have a certain elastic deformation capacity. When the moving spring mechanism 131 switches to the third state, the elastic deformation capacity between the support structure 136 and the arm body 1354 can help buffer some of the impact force of the moving spring mechanism 131, which also helps to reduce the holding force requirement on the electromagnetic component 12.

[0080] In the embodiments shown in the accompanying drawings, the movable spring 1311 is an integral spring structure. In other embodiments, the movable spring 1311 may also include two sub-springs arranged side by side and spaced apart from each other. When the movable spring mechanism 131 is provided with a lower armature 1314, the lower armature 1314 can be connected to both sub-springs simultaneously. The lower armature 1314 may also include two spaced-apart sub-armatures, with each sub-armature corresponding to one of the two sub-springs. Each movable contact 1313 of the movable spring 1311 can be formed by the corresponding positions of the two sub-springs. With this arrangement, the two sub-springs can provide more stable electrical contact, reduce poor contact caused by wear or damage to a single spring, share the mechanical load of the movable contact 1313, reduce the stress of a single spring, improve the durability of the high-voltage DC relay 10, provide a more uniform current distribution, reduce arcing and contact resistance, and improve electrical contact performance. Furthermore, when one of the sub-reeds fails, the other sub-reed can still achieve on / off control of the circuit with the stationary contact 141, thereby improving the performance reliability of the high-voltage DC relay 10.

[0081] The elastic element 132 is not limited to any suitable elastic component such as a helical spring or a leaf spring. In the figures of this application, a helical spring is used as an example. The connection and orientation of the elastic element 132 with the moving spring mechanism 131 and the pushing mechanism 133 are not limited, as long as the elastic cooperation between the moving spring mechanism 131 and the pushing mechanism 133 can be achieved, so as to buffer the moving spring mechanism 131 during the transition from the second state to the third state.

[0082] This application also provides a method for manufacturing a high-voltage DC relay 10, used to manufacture the high-voltage DC relay 10 as described in any of the above embodiments. In some embodiments, the method for manufacturing the high-voltage DC relay 10 includes the following steps:

[0083] Combination Figure 10 and Figure 11 As shown, an assembly 20 is provided, which includes a pushing mechanism 133, a moving spring mechanism 131, an elastic element 132, and a frame to be processed 21. The moving spring mechanism 131 is elastically engaged with the pushing mechanism 133 through the elastic element 132. The frame to be processed 21 includes two support arms 211 to be processed. The two support arms 211 to be processed are located on opposite sides of the elastic element 132 in the axial direction. Both support arms 211 to be processed are connected to the pushing mechanism 133 and are slidably engaged with the moving spring mechanism 131.

[0084] Combination Figure 2 , Figure 3 , Figure 10 and Figure 11As shown, the arm to be processed 211 is bent to form the arm body 1354 and the support structure 136. The support structure 136 is bent relative to the arm body 1354 toward the side where the moving spring mechanism 131 is located. The processed arm to be processed 211 forms the first arm 1351 of the high voltage DC relay 10.

[0085] The above-described preparation method simplifies the preparation process of the support structure 136 and reduces the preparation cost of the high-voltage DC relay 10. Furthermore, by bending the support structure 136 after the arm 211 to be processed and other components of the moving assembly 13 are assembled, the bending angle of the support structure 136 relative to the arm body 1354 can be set according to the specific structure of the assembled moving assembly 13 and different holding forces and spring-opening distance requirements. This allows for flexible setting of the distance between the end of the support structure 136 away from the arm body 1354 and the moving spring mechanism 131, achieving the effect of flexibly designing the maximum spring-opening distance between the moving spring mechanism 131 and the stationary contact 14.

[0086] Furthermore, in some embodiments, after the high-voltage DC relay 10 is fabricated by the fabrication method, the fabrication method further includes:

[0087] The bending angle of the support structure 136 relative to the support arm body 1354 is adjusted to regulate the distance between the end of the support structure 136 away from the support arm body 1354 and the moving spring mechanism 131. It can be seen that by bending to form a support structure 136 integrally formed with the support arm body 1354, the angle between the support structure 136 and the support arm body 1354 can be adjusted according to different support requirements during the use of the high-voltage DC relay 10, thereby adjusting the maximum spring-off distance between the moving contact 1313 and the stationary contact 141 in real time to meet different usage needs.

[0088] It is understandable that in the preparation method, methods such as... Figure 10 and Figure 11 In the assembly 20 shown, the moving component 13 has a support structure 136 connected to the first sidewall 137 of the support arm body 1354. In other embodiments, the manufacturing method may also employ methods such as... Figure 12 and Figure 13 As shown in the assembly drawing, in the manufactured moving assembly 13, the support structure 136 is connected to the second side wall 138 of the support arm body 1354, that is, the assembly is manufactured as shown in the figure. Figure 8 and Figure 9 The moving component 13 is shown.

[0089] 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.

[0090] 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 high-voltage DC relay, characterized in that, include: The stationary contact is equipped with a stationary contact point; The moving component includes a pushing mechanism, a moving spring mechanism, an elastic element, and a bracket. The moving spring mechanism has a moving contact opposite to the stationary contact. The moving spring mechanism is elastically engaged with the pushing mechanism through the elastic element. The bracket includes two first arms, which are located on opposite sides of the elastic element in the axial direction. Both first arms are connected to the pushing mechanism and are slidably engaged with the moving spring mechanism. At least one of the first arms includes an arm body and a support structure connected to the arm body on the side facing the moving spring mechanism. The support structure is inclined to the arm body. When the moving contact and the stationary contact spring apart under the action of a short-circuit current, the end of the support structure away from the arm body is used to support the moving spring mechanism on the path in which the moving spring mechanism moves away from the stationary contact.

2. The high-voltage DC relay according to claim 1, characterized in that, In the direction perpendicular to the moving spring mechanism, the support structure is inclined relative to the main body of the support arm toward the side where the moving spring mechanism is located; or, In the direction perpendicular to the pushing mechanism, the support structure is inclined relative to the main body of the support arm toward the side where the spring mechanism is located.

3. The high-voltage DC relay according to claim 1, characterized in that, The support structure is integrally formed with the main body of the support arm, and the support structure is formed by bending a portion of the bracket relative to the main body of the support arm.

4. The high-voltage DC relay according to claim 1, characterized in that, The tilt angle of the support structure relative to the main body of the support arm is adjustable.

5. The high-voltage DC relay according to claim 1, characterized in that, The main body of the support arm has a through hole that penetrates the main body of the support arm. The through hole has a first side wall and a second side wall that are opposite each other. The first side wall and the second side wall are arranged sequentially in the direction of the pushing mechanism pointing to the moving spring mechanism. The support structure is connected to the first side wall or the second side wall.

6. The high-voltage DC relay according to claim 1, characterized in that, The elastic element is disposed between the pushing mechanism and the moving spring mechanism, and its two ends abut against the moving spring mechanism and the pushing mechanism, respectively.

7. The high-voltage DC relay according to claim 1, characterized in that, The support structure is located between the moving spring mechanism and the pushing mechanism, and is spaced apart from the moving spring mechanism and the pushing mechanism.

8. The high-voltage DC relay according to any one of claims 1-7, characterized in that, The moving spring mechanism includes a relatively fixed lower armature and a moving spring plate. The moving contact is located on the side of the moving spring plate facing the stationary contact. The support structure is used to support one end of the moving spring mechanism facing either the lower armature or the moving spring plate.

9. The high-voltage DC relay according to claim 8, characterized in that, The high-voltage DC relay also includes an upper armature opposite to the lower armature. When the moving contact and the stationary contact are in contact, the upper armature and the lower armature can be magnetized and attract each other. The upper armature is disposed on the bracket, or the upper armature is disposed outside the moving assembly and fixed relative to the stationary contact.

10. The high-voltage DC relay according to any one of claims 1-7, characterized in that, The pushing mechanism can drive the moving spring mechanism to move towards the stationary contact, so that the moving component has a first state and a second state. In the first state, the moving contact is exactly in contact with the stationary contact. In the second state, the moving contact is pressed against the stationary contact by the elastic element. The moving spring mechanism is spaced apart from the support structure. During the switching from the first state to the second state, the pushing mechanism moves relative to the moving spring mechanism towards the stationary contact. The distance between the moving spring mechanism and the support structure is smaller in the second state than in the first state.

11. The high-voltage DC relay according to claim 10, characterized in that, In the second state, the difference between the length of the elastic element and the ultimate compression length of the elastic element is greater than the distance between the moving spring mechanism and the end of the support structure away from the main body of the support arm.

12. The high-voltage DC relay according to claim 10, characterized in that, The moving contact can spring away from the stationary contact under the electric repulsive force generated by the short-circuit current to switch from the second state to the third state. In the third state, the support structure abuts against the moving spring mechanism to prevent the moving spring mechanism and the pushing mechanism from getting close to each other. The length of the elastic element is greater than the ultimate compression length.

13. The high-voltage DC relay according to any one of claims 1-7, characterized in that, The high-voltage DC relay also includes an electromagnetic component. The pushing mechanism includes a pushing seat connected to the bracket and a pushing rod connected to the side of the pushing seat facing away from the moving spring mechanism. The pushing rod is inserted into the electromagnetic component, and the electromagnetic component can drive the pushing seat to move towards or away from the stationary contact through the pushing rod.

14. A method for manufacturing a high-voltage DC relay, characterized in that, include: An assembly is provided, the assembly including a pushing mechanism, a moving spring mechanism, an elastic element, and a frame to be processed. The moving spring mechanism is elastically engaged with the pushing mechanism through the elastic element. The frame to be processed includes two support arms to be processed, the two support arms to be processed are respectively located on opposite sides of the elastic element in the axial direction, and both support arms to be processed are connected to the pushing mechanism and are slidably engaged with the moving spring mechanism. The arm to be processed is bent to form the arm body and the support structure, wherein the support structure is bent relative to the arm body toward the side where the moving spring mechanism is located.

15. The preparation method according to claim 14, characterized in that, After the step of bending the arm to be processed to form the arm body and the support structure, the preparation method further includes: Adjust the bending angle of the support structure relative to the main body of the support arm to adjust the distance between the end of the support structure away from the main body of the support arm and the moving spring mechanism.

Images