High-voltage direct-current relay

Abstract

The utility model relates to a high-voltage direct-current relay. The high-voltage direct-current relay comprises a static contact and a movable assembly, and the static contact is provided with a static contact point; the movable assembly comprises a pushing mechanism, a movable spring mechanism and an elastic element, the movable spring mechanism is provided with a movable contact opposite to the static contact, and the movable spring mechanism is elastically matched with the pushing mechanism through the elastic element; the movable assembly is provided with a supporting surface, the supporting surface and the movable spring mechanism are arranged at an interval, and the supporting surface is used for supporting the movable spring mechanism on a path of the movable spring mechanism moving 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 technical field of relays, and particularly to a high-voltage DC relay. Background Art

[0002] As a new type of electric automatic switch, a high-voltage DC relay can achieve a normally open state or a normally closed state through electromagnetic holding force. Currently, a high-voltage DC relay generally includes an electromagnetic component, a moving component, and a static contact. The moving contact provided on the moving reed of the moving component and the static contact provided on the static contact together serve as the contact part of the high-voltage DC relay. The electromagnetic component includes a coil, a first iron core, and a second iron core. When the coil is energized, the second iron core can be magnetized, causing the second iron core to attract the first iron core, thereby driving the moving component closer to the static contact until the moving contact on the moving component contacts the static contact on the static contact, achieving the conduction of the circuit. However, in the current high-voltage DC relay, when a short circuit or overload occurs in the circuit, the moving contact and the static contact will bounce off due to the electro-dynamic repulsive force, and an arcing phenomenon will occur between the moving contact and the static contact, resulting in damage to the relay. In industries such as the new energy industry that use high-voltage circuits, the demand for miniaturization and short-circuit resistance of high-voltage DC relays is increasing day by day. Summary of the Invention

[0003] Based on this, it is necessary to provide a high-voltage DC relay to address the problem that the high-voltage DC relay is easily damaged due to the arcing phenomenon during a short circuit.

[0004] A high-voltage DC relay includes:

[0005] A static contact provided with a static contact point;

[0006] A moving component including a pushing mechanism, a moving reed mechanism, and an elastic element. The moving reed mechanism is provided with a moving contact opposite to the static contact point, and the moving reed mechanism is elastically coupled to the pushing mechanism through the elastic element;

[0007] The moving component forms a support surface, which is spaced apart from the moving reed mechanism. The support surface is used to support the moving reed mechanism on the path of the moving reed mechanism moving away from the static contact when a short-circuit current occurs and causes the moving contact and the static contact to bounce off.

[0008] In the above-mentioned high-voltage DC relay, the moving component is formed with a support surface that can support the moving spring mechanism on the path where the moving spring mechanism moves away from the static contact when a short-circuit current occurs. When the circuit connected to the high-voltage DC relay is short-circuited or overloaded, the moving contact of the moving spring mechanism and the static contact of the static contact bounce off due to the electro-dynamic repulsive force. The moving spring mechanism can first compress the elastic element until the support surface supports the moving spring mechanism so that the moving spring mechanism is relatively fixed with respect to the pushing mechanism. Since the electro-dynamic repulsive force between the moving contact and the static contact disappears after they bounce off, during the process of the moving spring mechanism moving away from the static contact to the support surface, the elastic element can effectively buffer the kinetic energy of the moving spring mechanism, and the elastic element will not be compressed to the ultimate compression length. When the support surface supports the moving spring mechanism, the impact of the moving spring mechanism on the pushing mechanism will not be too large, avoiding damage to the high-voltage DC relay caused by excessive impact resulting in the overall detachment of the moving component from the static contact. Moreover, the support of the support surface for the moving spring mechanism makes the moving spring mechanism no longer continue to move away from the static contact, and the length of the elastic element is still greater than the ultimate compression length, which is beneficial to reducing the relative bouncing distance between the moving contact and the static contact. Combining with the buffering of the elastic element can avoid the design of the moving component detaching from the static contact, so that the distance between the moving contact and the static contact will not be too far, thereby being beneficial to avoiding the generation of excessive heat due to arcing between the moving contact and the static contact, which may cause damage or even explosion of the high-voltage DC relay. Additionally, the buffering of the elastic element for the moving spring mechanism can also reduce the requirement for the holding force of the moving component on the electromagnetic component, enabling the iron core of the electromagnetic component to support the entire moving component with a smaller holding force, which is beneficial to reducing the number of turns of the coil winding of the electromagnetic component and / or the volume of the iron core, thus being beneficial to the miniaturization design of the high-voltage DC relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 FIG. is a schematic structural diagram of a high-voltage DC relay with a support surface provided on a bracket in an initial state in some embodiments.

[0010] Figure 2 FIG. Figure 1 is a schematic structural diagram of the moving component in the high-voltage DC relay shown in FIG.

[0011] Figure 3 FIG. is an exploded view of the moving component in which the bracket includes a support structure in some embodiments.

[0012] Figure 4 FIG. Figure 1 is a schematic structural diagram of the high-voltage DC relay shown in FIG. in a first state.

[0013] Figure 5 FIG. Figure 1 is a schematic structural diagram of the high-voltage DC relay shown in FIG. in a second state.

[0014] Figure 6 FIG. Figure 1Schematic diagram of the structure of the high-voltage DC relay in the third state as shown.

[0015] Figure 7 Schematic diagram of the structure of the moving component without a lower armature in some embodiments.

[0016] Figure 8 For Figure 7 Schematic diagram of the structure of the moving component from another angle as shown.

[0017] Figure 9 Schematic diagram of the structure of the moving component with the support structure connected to the arm body in some embodiments.

[0018] Figure 10 For Figure 9 Schematic diagram of the structure of the moving component from another angle as shown.

[0019] Figure 11 Schematic diagram of the structure with the support structure connected to both sides of the arm body in some embodiments.

[0020] Figure 12 For Figure 11 Schematic diagram of the structure of the moving component from another angle as shown.

[0021] Figure 13 Schematic diagram of the structure with the support structure connected to both sides of the arm body in some other embodiments.

[0022] Figure 14 For Figure 13 Schematic diagram of the structure of the moving component from another angle as shown.

[0023] Figure 15 Schematic diagram of the structure of the high-voltage DC relay with the fixing piece including the support structure in the initial state in some embodiments.

[0024] Figure 16 For Figure 15 Schematic diagram of the structure of the moving component in the high-voltage DC relay as shown.

[0025] Figure 17 For Figure 16 Explosion diagram of the moving component as shown.

[0026] Figure 18 Schematic diagram of the structure of the moving component with the support surface provided on the connecting portion in some embodiments.

[0027] Figure 19 For Figure 18 Explosion diagram of the moving component as shown.

[0028] Figure 20 For Figure 18 Schematic diagram of the structure of the moving component from another angle as shown.

[0029] Figure 21 Structural schematic diagram of a high - voltage DC relay in an initial state where the driving mechanism includes a support structure in some embodiments.

[0030] Figure 22 For Figure 21 Structural schematic diagram of the moving component in the high - voltage DC relay shown.

[0031] Figure 23 For Figure 22 Structural schematic diagram of the moving component from another angle shown.

[0032] Figure 24 For Figure 23 Explosion schematic diagram of the moving component shown.

[0033] Figure 25 Structural schematic diagram of a high - voltage DC relay in an initial state where the support surface is arranged in the chute in some embodiments.

[0034] Figure 26 For Figure 25 Structural schematic diagram of the moving component in the high - voltage DC relay shown.

[0035] Figure 27 For Figure 26 Structural schematic diagram of the moving component from another angle shown.

[0036] Figure 28 For Figure 27 Explosion schematic diagram of the moving component shown.

[0037] Figure 29 For Figure 25 Structural schematic diagram of some components of the high - voltage DC relay shown.

[0038] Figure 30 Structural schematic diagram of a moving component where the moving reed includes two sub - reeds in some embodiments.

[0039] Figure 31 For Figure 30 Structural schematic diagram of the moving component from another angle shown.

[0040] Figure 32 Structural schematic diagram where the elastic element is sleeved on the support structure in some embodiments.

[0041] Figure 33 For Figure 32 Explosion schematic diagram of the moving component shown.

[0042] Figure 34 Structural schematic diagram where the second part of the first body is inclined to the support structure in some embodiments.

[0043] Figure 35 The Figure 34 structural schematic diagram of the moving component shown in the figure.

[0044] Figure 36 It is a structural schematic diagram of the support structure connected to the edge of the connecting body in some embodiments.

[0045] Figure 37 The Figure 36 exploded schematic diagram of the moving component shown in the figure.

[0046] Reference numerals:

[0047] 10. High-voltage DC relay; 11. Base; 12. Electromagnetic component; 121. Upper iron core; 122. Lower iron core; 13. Moving component; 131. Moving spring mechanism; 1311. Moving spring piece; 1312. Sub-spring piece; 1313. Moving contact; 1314. Lower armature; 1315. Sliding structure; 132. Elastic element; 133. Pushing mechanism; 1331. Pushing seat; 1332. Pushing rod; 134. Fixed piece; 1341. Connecting part; 1342. First connecting plate; 1343. Second connecting plate; 135. Bracket; 1351. First arm; 1352. First main body; 1353. Second main body; 1354. Arm main body; 1355. Through hole; 1356. Chute; 1357. Second arm; 1358. Connecting body; 136. Support structure; 1361. Groove; 1362. Support surface; 14. Static contact; 141. Static contact point; 142. Insulating cover; 143. Upper armature. Detailed embodiments

[0048] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed embodiments of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0049] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0050] In addition, if 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 quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0051] In this application, unless otherwise clearly specified and limited, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] In this application, unless otherwise clearly specified and limited, if there is a description such as a first feature being "on" or "under" a second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0053] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate 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 intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0054] As the application of high-voltage DC relays becomes more and more widespread in equipment in various fields, the industry's requirements for the heat loss resistance, short-circuit circuit resistance, and voltage of high-voltage DC relays are also getting higher and higher. Among them, the current and voltage of the circuits in which high-voltage DC relays are applied are getting higher and higher. For example, in equipment such as new energy vehicles, as the requirement for the cruising range of new energy vehicles increases, the capacity of the battery packs of new energy vehicles is also getting higher and higher, and the current and voltage faced by the high-voltage DC relays applied in the battery pack circuits are also getting higher and higher. Thus, when the circuit is short-circuited or overloaded, the electro-dynamic repulsive force generated by the moving contact and the static contact of the high-voltage DC relay is relatively large, and it is easy to bounce the moving contact and the static contact apart by a large distance. For example, the moving spring mechanism squeezes the elastic element to the extreme compression state, and then conducts the impact force to the push seat and the electromagnetic component. At this time, the impact force is too large, which is likely to cause the electromagnetic component, the moving component, and the static contact to be separated as a whole, resulting in the damage of the high-voltage DC relay, or the distance between the moving contact and the static contact bounces too far, resulting in excessive heat generated by the arc phenomenon between the moving contact and the static contact, burning out the high-voltage DC relay, and even causing the high-voltage DC relay to explode. However, for traditional high-voltage DC relays, if we want to increase the holding force of the electromagnetic component on the moving component to avoid the insufficient holding force of the electromagnetic component from detaching from the static contact or reduce the bouncing distance between the moving contact and the static contact, we usually need to increase the number of turns of the coil winding, resulting in an increase in the cost and volume of the electromagnetic component, and increasing the volume and cost of the high-voltage DC relay.

[0055] Based on the above problems, the present application provides a high-voltage DC relay.

[0056] Please refer to Figure 1 、 Figure 2 and Figure 3 , Figure 1 which are schematic structural diagrams of the high-voltage DC relay 10 in some embodiments, Figure 2 and Figure 3Explosion schematic diagram of the moving component 13 in some other embodiments. In some embodiments, the high-voltage DC relay 10 includes a base 11, an electromagnetic component 12, a moving component 13, a static contact 14, and an insulating cover 142. The insulating cover 142 is provided on the base 11, and the static contact 14 is provided on the insulating cover 142. There may be two static contacts 14, and both of the two static contacts 14 are provided with static contact points 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 is provided with two moving contact points 1313 opposite to the two static contact points 141. The moving spring mechanism 131 is elastically connected to the pushing mechanism 133 through the elastic element 132. The electromagnetic component 12 is provided on the base 11 and can drive the entire moving component 13 to move in a direction close to or away from the static contact point 141 through the pushing mechanism 133, so that the moving contact point 1313 contacts the static contact point 141, or the moving contact point 1313 is separated from the static contact point 141. It can be understood that the high-voltage DC relay 10 can be applied to a circuit as a switching element. The static contact 14 may be provided with lead-out terminals electrically connected to the two static contact points 141, and the lead-out terminals are electrically connected to the circuit. When the moving contact point 1313 and the static contact point 141 are in contact, the moving contact point 1313 conducts the two static contact points 141 to make the circuit conductive. At this time, the high-voltage DC relay 10 is turned on. When the moving contact point 1313 is separated from the static contact point 141, the two static contact points 141 are electrically isolated and the circuit is disconnected. At this time, the high-voltage DC relay 10 is turned off. In some embodiments, the high-voltage DC relay 10 may further include a housing (not shown in the figure) covering the insulating cover 142 and the static contact 14. The static contact 14 is led out from the housing through conductive structures such as electrodes and wires to be electrically connected to the circuit. The material of the housing includes but is not limited to insulating materials such as plastics. The housing can isolate the static contact 14, the insulating cover 142, and the moving component 13 from the outside world to achieve the function of insulation protection.

[0057] The high-voltage DC relay 10 provided by the present application is beneficial to reducing the manufacturing cost and compressing the volume. At the same time, it can effectively support the moving spring mechanism 131, reduce the distance between the moving contact point 1313 and the static contact point 141 to reduce the heat generated by the arc phenomenon, and prevent the moving component 13 and the electromagnetic component 12 from detaching from the static contact 14, resulting in damage to the high-voltage DC relay 10. The high-voltage DC relay 10 provided by the present application can be used in circuits with relatively high currents, such as circuits with a working current within 8 kA. The high-voltage DC relay 10 includes but is not limited to being used in the battery pack circuit of new energy vehicles. The high-voltage DC relay 10 can also be used as a switching element in the circuits of other any applicable devices, which will not be elaborated in this application.

[0058] In some embodiments, the driving mechanism 133 includes a driving seat 1331 and a driving rod 1332 connected to the side of the driving 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 disposed around the upper iron core 121 and the lower iron core 122. The upper iron core 121 is fixedly disposed on the base 11, and the lower iron core 122 and the coil (not shown in the figure) may both be disposed within the base 11. The driving rod 1332 passes through the upper iron core 121 and is inserted into the lower iron core 122, and the driving rod 1332 is slidably engaged with the upper iron core 121. When the coil is energized, the upper iron core 121 and the lower iron core 122 can be magnetized, so that the upper iron core 121 and the lower iron core 122 attract each other, causing the lower iron core 122 to move in the direction close to the upper iron core 121, thereby driving the driving rod 1332 to drive the moving assembly 13 as a whole to move in the direction close to the static contact 141.

[0059] In some embodiments, the moving assembly 13 further includes a bracket 135. The bracket 135 is connected to the driving seat 1331 and is slidably engaged with the moving spring mechanism 131. For example, the bracket 135 may include two first arms 1351 and a second arm 1357. The two first arms 1351 are respectively located on the opposite sides of the elastic element 132 and the moving spring mechanism 131, and are both directly or indirectly connected to the driving 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 facing away from the driving seat 1331. The two first arms 1351 are slidably engaged with the moving spring mechanism 131 on the opposite sides of the moving spring mechanism 131, which can enable the moving spring mechanism 131 to move relative to the driving seat 1331 in the direction close to or away from the static contact 141, thereby 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 provide a guiding effect for the movement of the moving spring mechanism 131 relative to the driving seat 1331, improving the performance stability of the high-voltage DC relay 10. The second arm 1357 can define the limit position of the moving spring mechanism 131 away from the driving seat 1331 on the side of the moving spring mechanism 131 facing the static contact 141, preventing the moving spring mechanism 131 from detaching from the driving seat 1331, and improving the performance stability of the high-voltage DC relay 10.

[0060] Further, in some embodiments, the moving component 13 is formed with a supporting surface 1362. The supporting surface 1362 is located between the moving spring mechanism 131 and the pushing seat 1331, and is spaced apart from the moving spring mechanism 131 and the pushing seat 1331. The supporting surface 1362 can support the moving spring mechanism 131 on the path of the moving spring mechanism 131 moving away from the static contact 141. In some embodiments, the movement of the moving spring mechanism 131 away from the static contact 141 is in the same direction as the movement towards the pushing seat 1331. In the present application, the state where the moving contact 1313 and the static contact 141 are spaced apart and the electromagnetic assembly 12 does not apply a force to the pushing rod 1332, that is, the state where the high-voltage DC relay 10 disconnects the circuit is called the initial state. In the initial state, the supporting surface 1362 is spaced apart from the moving spring mechanism 131. When it is necessary to bring the moving contact 1313 and the static contact 141 into contact to conduct the circuit, the lower iron core 122 of the electromagnetic assembly 12 moves towards the upper iron core 121, which can drive the pushing mechanism 133 driven by the pushing rod 1332, and then drive the moving spring mechanism 131 to move towards the static contact 141, so that the moving component 13 has a first state and a second state. Combining Figure 4 and Figure 5 As shown, when the moving component 13 moves to the first state, the moving contact 1313 just contacts the static 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 that in the initial state. That is to say, in the process of the pushing mechanism 133 driving the moving spring mechanism 131 to move towards the static 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.

[0061] After the electromagnetic component 12 drives the moving spring mechanism 131 to move to the first state through the pushing mechanism 133, the electromagnetic component 12 continues to drive the pushing mechanism 133 to move towards the static contact 141 to the second state. During the process of switching from the first state to the second state, since the moving contact 1313 contacts the static contact 141 and the moving contact 1313 and the static contact 141 are relatively fixed, and the pushing mechanism 133 continues to move towards the static contact 141, the distance between the pushing seat 1331 and the moving spring mechanism 131 will decrease. That is to say, during the process of switching from the first state to the second state, the moving spring mechanism 131 and the pushing seat 1331 are relatively close to each other, and the moving spring mechanism 131 and the pushing seat 1331 will squeeze the elastic element 132, causing the length of the elastic element 132 to decrease and the elastic element 132 to undergo elastic deformation. It can be understood that in the first state and the second state, the moving contact 1313 is in contact with the static contact 141, and the elastic force exerted by the elastic element 132 on the moving contact 1313 is greater in the second state than in the first state. The setting of the second state enables the elastic element 132 to press the moving contact 1313 against the static contact 141, improving the stability and reliability of the contact between the moving contact 1313 and the static contact 141. At the same time, the elastic element 132 can cooperate with the electromagnetic component 12 to offset the electric repulsive force between the moving contact 1313 and the static contact 141, which is beneficial to reducing the holding force requirement of the high-voltage DC relay 10 for the electromagnetic component 12 and is beneficial to reducing the cost and volume of the electromagnetic component 12.

[0062] It can be understood that during the process of switching from the initial state to the first state and during the process of switching from the first state to the second state, the lower iron core 122 gradually approaches the upper iron core 121, and in the first state, the lower iron core 122 is spaced from the upper iron core 121, and in the second state, the lower iron core 122 can just contact the upper iron core 121, which is beneficial to enhancing the magnetic attraction between the upper iron core 121 and the lower iron core 122, thereby enhancing the holding force of the electromagnetic component 12 on the moving component 13.

[0063] In some embodiments, by designing the position of the supporting surface 1362 between the pushing seat 1331 and the moving spring mechanism 131, in the second state, the supporting surface 1362 still remains spaced from the moving spring mechanism 131, and the distance between the moving spring mechanism 131 and the supporting surface 1362 in the second state is less than that in the first state. And, the distance between the supporting surface 1362 and the pushing seat 1331 is greater than the ultimate compression length of the elastic element 132. That is to say, in the second state, the difference between the length of the elastic element 132 and the ultimate compression length of the elastic element 132 is greater than the distance between the moving spring mechanism 131 and the supporting surface 1362, and the length of the elastic element 132 can be equal to the distance between the moving spring mechanism 131 and the pushing seat 1331. Combined with Figure 6As shown, it can be understood that when the circuit is short-circuited or overloaded, taking the current exceeding 8 kA as an example, the electro-dynamic repulsive force between the moving contact 1313 and the static contact 141 is greater than the elastic force exerted on the moving contact 1313 by the elastic element 132 and the holding force of the electromagnetic assembly 12. The moving contact 1313 and the static contact 141 bounce off, causing the moving assembly 13 to move in the direction close to the pushing seat 1331 and further compress the elastic element 132 until the moving assembly 13 abuts against the supporting surface 1362. The supporting surface 1362 provides a supporting effect on the moving assembly 13, making the moving assembly 13 unable to move relative to the pushing seat 1331 in the direction close to the pushing seat 1331. In the present application, the state where the supporting surface 1362 abuts against the moving assembly 13 to provide a supporting effect on the moving assembly 13 is referred to as the third state of the moving assembly 13. In the third state, the moving spring mechanism 131, the bracket 135 and the pushing mechanism 133 are relatively fixed, and the electromagnetic assembly 12 bears the impact force of the moving spring mechanism 131.

[0064] It can be understood that the supporting surface 1362 of the moving assembly 13 only contacts the moving spring mechanism 131 in the third state to achieve the supporting effect. In other states, the supporting surface 1362 will not interfere with the movement of the moving spring mechanism 131, which is beneficial to avoiding other types of interference such as sliding fit and limit fit between the supporting surface 1362 and the movement of the moving spring mechanism 131, increasing risks such as jamming, uneven force or wear and chip removal of the moving spring mechanism 131. While achieving the supporting effect, it is also beneficial to maintain the structural reliability of the moving assembly 13 and has little impact on the contact reliability of the moving assembly 13.

[0065] For the above-mentioned high-voltage DC relay 10, a support surface 1362 capable of supporting the moving spring mechanism 131 is formed on the moving component 13 along the path of the moving spring mechanism 131 moving towards the pushing mechanism 133. When the circuit connected to the high-voltage DC relay 10 is short-circuited or overloaded, the moving contact 1313 of the moving spring mechanism 131 and the static contact 141 of the static contact 14 bounce off due to the electro-dynamic repulsive force. The moving spring mechanism 131 can first compress the elastic element 132 until the support surface 1362 supports the moving spring mechanism 131 so that the moving spring mechanism 131 is relatively fixed to the pushing mechanism 133. Since the electro-dynamic repulsive force between the moving contact 1313 and the static contact 141 disappears after they bounce off, during the process of the moving spring mechanism 131 moving away from the static contact 141 to the support surface 1362, the elastic element 132 can effectively buffer the kinetic energy of the moving spring mechanism 131, and the elastic element 132 will not be compressed to the ultimate compression length. When the support surface 1362 supports the moving spring mechanism 131, the impact of the moving spring mechanism 131 on the pushing mechanism 133 and the electromagnetic component 12 will not be too large, avoiding damage to the high-voltage DC relay 10 caused by excessive impact resulting in the overall separation of the moving component 13 and the electromagnetic component 12 from the static contact 14. Moreover, the support of the support surface 1362 on the moving spring mechanism 131 prevents the moving spring mechanism 131 from moving further away from the static contact 141, and the distance between the moving spring mechanism 131 and the pushing seat 1331 is still greater than the ultimate compression length of the elastic element 132, which is beneficial to reducing the relative bounce-off distance between the moving contact 1313 and the static contact 141. Combining with the buffering of the elastic element 132 can avoid the design of the moving component 13 detaching from the static contact 14, so that the distance between the moving contact 1313 and the static contact 141 will not be too far, thus helping to avoid excessive heat generated by the arcing phenomenon between the moving contact 1313 and the static contact 141, which may cause damage or even explosion of the high-voltage DC relay 10. In addition, the buffering of the elastic element 132 on the moving spring mechanism 131 can also reduce the requirement for the holding force of the moving component 13 on the electromagnetic component 12, enabling the iron core of the electromagnetic component 12 to support the entire moving component 13 with a smaller holding force, which is beneficial to reducing the number of turns of the coil winding of the electromagnetic component 12 and / or the volume of the iron core, and thus beneficial to the miniaturization design of the high-voltage DC relay 10.

[0066] Therefore, for the above-mentioned high-voltage DC relay 10, during the process of switching from the second state to the third state, first, the elastic element 132 buffers the impact of the moving spring mechanism 131, and then the electromagnetic component 12 bears the impact of the moving spring mechanism 131, which is beneficial to reducing the requirement for the holding force of the electromagnetic component 12, beneficial to reducing the cost and volume of the electromagnetic component 12, and at the same time can also reduce the bounce-off distance between the moving contact 1313 and the static contact 141, thereby reducing the heat generated by the arcing phenomenon. The high-voltage DC relay 10 can achieve the effects of small volume, low cost, high short-circuit current resistance, and high voltage resistance.

[0067] In some embodiments, an elastic element 132 is disposed between the pushing seat 1331 and the moving spring mechanism 131, and the two ends thereof are respectively abutted against the moving spring mechanism 131 and the pushing seat 1331. The two ends of the elastic element 132 can be respectively connected to the moving spring mechanism 131 and the pushing seat 1331. With such an arrangement, the spatial layout among the moving spring mechanism 131, the elastic element 132, and the pushing mechanism 133 can be reasonably planned, making the structure more compact, which is beneficial to improving the space utilization efficiency of the moving assembly 13. At the same time, it is also beneficial to make the elastic element 132 relatively far away from the contact positions of the moving contact 1313 and the static contact 141, reducing the influence of the elastic element 132 by high temperature and ablation splashes, and reducing the assembly difficulty of the elastic element 132 with other components. It can be understood that when the supporting surface 1362 is located between the moving spring mechanism 131 and the pushing seat 1331, the supporting surface 1362 is farther away from the contact positions of the moving contact 1313 and the static contact 141, which is also beneficial to reducing the influence of the supporting surface 1362 by high temperature and ablation splashes. For example, it can avoid the distance between the supporting surface 1362 and the moving spring mechanism 131 being reduced due to splashes, which affects the switching from the second state to the third state.

[0068] In some embodiments, please refer to Figure 5 and Figure 6 As shown, in some embodiments, the moving spring mechanism 131 includes a moving spring piece 1311 and a lower armature 1314 fixedly connected to the moving spring piece 1311. The high-voltage DC relay 10 further includes an upper armature 143 opposite to the lower armature 1314. The moving contact 1313 is disposed on one side of the moving spring piece 1311 facing the static contact 14. The upper armature 143 and the lower armature 1314 jointly form an anti-short-circuit ring structure, and the upper armature 143 is located on the side of the lower armature 1314 facing away from the pushing seat 1331. The upper armature 143 can be fixed to the bracket 135 and located on the side of the moving spring piece 1311 facing away from the pushing seat 1331. The upper armature 143 can also be disposed on the static contact 14. For example, the high-voltage DC relay 10 includes an insulating cover 142, a static contact 14, and an upper armature 143. The insulating cover 142 covers the moving assembly 13 and is disposed on the base 11. Both the static contact 14 and the upper armature 143 are fixedly arranged on the insulating cover 142. The static contact 14 protrudes outside the insulating cover 142 on the side facing away from the moving spring mechanism 131, that is, the side facing away from the static contact 141. When the moving contact 1313 and the static contact 141 are in contact, the magnetic field generated by the moving contact 1313 and the static contact 141 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, which can provide a holding force for the moving contact 1313 and the static contact 141, being beneficial to reducing the holding force required by the electromagnetic assembly 12, and also being beneficial to reducing the cost and volume of the electromagnetic assembly 12.

[0069] When the high-voltage DC relay 10 is provided with a short-circuit ring structure, the supporting surface 1362 can face either the lower armature 1314 or the moving reed 1311. As long as it can abut against either the upper armature 143 or the moving reed 1311 on the moving path of the moving reed mechanism 131 towards the pushing seat 1331 to provide a supporting effect on the moving reed mechanism 131. Of course, the moving component 13 can also be provided with multiple supporting surfaces 1362, and the multiple supporting surfaces 1362 face the moving reed 1311 and the upper armature 143 respectively. The supporting surface 1362 can simultaneously abut against the moving reed 1311 and the upper armature 143 to achieve a more stable and reliable supporting effect on the moving component 13. In some embodiments, the moving component 13 is formed with at least two supporting surfaces 1362. The at least two supporting surfaces 1362 are located on opposite sides of the elastic element 132. The at least two supporting surfaces 1362 can simultaneously face either the moving reed 1311 or the upper armature 143, or can also face the moving reed 1311 and the upper armature 143 respectively. Setting at least two opposite supporting surfaces 1362 to achieve a uniformly distributed supporting effect on the moving reed mechanism 131 at multiple positions, and cooperating with the guiding effect of the bracket 135 on the moving reed mechanism 131, can improve the stability and reliability of the movement of the moving reed mechanism 131 relative to the pushing seat 1331 and prevent the moving reed mechanism 131 from deflecting. Of course, the short-circuit ring structure can also be omitted, Figure 7 and Figure 8 FIG. shows a schematic structural diagram of the moving component 13 when the short-circuit ring structure is omitted in some of the embodiments. Both sides of the moving reed 1311 can respectively abut against the second arm 1357 and the elastic element 132.

[0070] It can be understood that when the upper armature 143 is arranged on the bracket 135, for example, arranged on the second arm 1357 and located between the second arm 1357 and the moving reed 1311, if in the first state, the upper armature 143 and the lower armature 1314 are in contact, then in the second state, since the moving reed 1311 and the lower armature 1314 as a whole move a certain distance towards the pushing seat 1331 relative to the first state, the upper armature 143 and the lower armature 1314 are spaced apart. And when the upper armature 143 is arranged on the insulating cover 142, if in the first state, the lower armature 1314 is in contact with the upper armature 143, then in the second state, the upper armature 143 and the lower armature 1314 are also spaced apart. In some other embodiments, the high-voltage DC relay 10 can also install the upper armature 143 through a carrier structure additionally arranged on the base 11 to fix the upper armature 143 between the insulating cover 142 and the lower armature 1314, as long as in the first state and the second state, the upper armature 143 and the lower armature 1314 can attract each other to provide a holding force for the contact between the moving contact 1313 and the static contact 141.

[0071] In the present application, it is described that the first arm 1351 is in sliding fit with the moving spring mechanism 131. It can be that the opposite sides of the lower armature 1314 are in sliding fit with the opposite surfaces of the two first arms 1351, or the opposite sides of the moving spring piece 1311 are in sliding fit with the two first arms 1351, or a part of the moving spring piece 1311 or the lower armature 1314 is inserted and slidably arranged on the first arm 1351. As long as the first arm 1351 can provide guidance and limitation for the movement of the moving spring mechanism 131 relative to the pushing seat 1331.

[0072] In some embodiments, the bracket 135 can be directly connected to the pushing seat 1331. The moving component 13 can also include a fixing piece 134 connected to the bracket 135 and the pushing seat 1331, and the bracket 135 is indirectly connected to the pushing seat 1331 through the fixing piece 134. It should be noted that in the present application, the formation structure and formation position of the supporting surface 1362 are not limited, as long as it can provide a supporting effect for the moving component 13 on the path of the moving component 13 moving towards the pushing seat 1331. For example, the supporting surface 1362 can be formed on the bracket 135, or on the fixing piece 134, or on the pushing mechanism 133. The following uses multiple embodiments to illustrate the formation methods of the supporting surface 1362 on different positions and components. The setting of the supporting surface 1362 is not limited to the description in the present application, and the formation methods of the following various embodiments can also be combined with each other. That is to say, the moving component 13 can be formed with multiple supporting surfaces 1362, and the multiple supporting surfaces 1362 can be respectively formed on different components and / or different positions.

[0073] Combined with Figure 1 、 Figure 2 、 Figure 9 and Figure 10 As shown in Figure 1 、 Figure 2 、 Figure 9 and Figure 10 In some embodiments, when the bracket 135 is provided with two first arms 1351 connected to the pushing seat 1331, the supporting surface 1362 is formed on at least one of the first arms 1351.

[0074] Furthermore, referring to Figure 1 and Figure 2As shown, in some embodiments, the first arm 1351 includes a first body 1352, a second body 1353, and a support structure 136. The first body 1352, the second body 1353, and the support structure 136 can be integrally formed. The first body 1352 is slidably engaged with the moving spring mechanism 131. The second body 1353 is connected to the pushing mechanism 133. The support structure 136 is connected to the first body 1352 and the second body 1353 and intersects with the first body 1352 and the second body 1353. For example, the first body 1352 and the second body 1353 can both be perpendicular to the extension direction of the moving spring piece 1311, and the support structure 136 can be perpendicular to the first body 1352 and the second body 1353. The first body 1352 can be located outside the second body 1353. The first body 1352, the support structure 136, and the second body 1353 together form a stepped structure. A support surface 1362 is formed on the side of the support structure 136 facing the moving spring mechanism 131. In other words, the support surface 1362 corresponds to the stepped surface of the stepped structure.

[0075] Referring to Figure 9 and Figure 10 As shown, in other embodiments, the first arm 1351 includes an arm body 1354 and a support structure 136 connected to the arm body 1354. The arm body 1354 and the support structure 136 can be integrally formed. At least a part of the support structure 136 is located on the side of the arm body 1354 facing the moving spring mechanism 131 and is located between the moving spring mechanism 131 and the pushing seat 1331. A support surface 1362 is formed on the side of the support structure 136 facing the moving spring mechanism 131.

[0076] In this embodiment, the connection manner between the support structure 136 and the arm body 1354 is not limited. For example, the arm body 1354 can be provided with a through hole 1355, and the support structure 136 is connected to the arm body 1354 within the through hole 1355. The support structure 136 can be formed by bending a part of the first arm 1351 that forms the through hole 1355 relative to the arm body 1354 toward the side where the elastic element 132 is located, which is beneficial to reducing the material consumption of the support structure 136 and improving the structural strength of the first arm 1351. In some embodiments, in the axial direction of the elastic element 132, the through hole 1355 has two opposite side walls, one side wall is close to the moving spring mechanism 131, and the other side wall is far from the moving spring mechanism 131. Referring to Figure 9 and Figure 10 As shown, the support structure 136 can be connected to the side wall of the through hole 1355 close to the moving spring mechanism 131. In some embodiments, the support structure 136 can also be connected to the side wall of the through hole 1355 far from the moving spring mechanism 131.

[0077] In this embodiment, 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 reed 1311. The two end portions of the moving reed 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 adapting to the positions of the lower armature 1314 and the first arm 1351, and reducing the manufacturing difficulty of the support structure 136.

[0078] In some embodiments, when the support structure 136 is connected to the side wall of the through hole 1355 away from the moving reed mechanism 131, the support structure 136 can be inclined to the axial direction of the elastic element 132, and the end of the support structure 136 away from the arm main body 1354 is used to support the moving reed mechanism 131. Thus, the distance between the support surface 1362 and the moving reed mechanism 131 can be reduced, which is beneficial to reducing the distance between the moving contact 1313 and the static contact 141 in the third state, and beneficial to reducing the heat generated by the arc phenomenon.

[0079] Combined Figures 11 - 14 As shown, in some embodiments, the first arm 1351 can be provided with two support structures 136. The two support structures 136 are respectively connected to the opposite two edges of the arm main body 1354. The support structure 136 can be formed by bending the parts on both sides of the first arm 1351 relative to the arm main body 1354 toward the side where the elastic element 132 is located. Refer to Figure 11 and Figure 12 As shown, in this embodiment, the support structure 136 can be substantially perpendicular to the arm main body 1354 and be opposite to the two end portions of the moving reed 1311 located outside the lower armature 1314. Refer to Figure 13 and Figure 14 As shown, the support structure 136 can also be inclined to the arm main body 1354. One end of the support structure 136 away from the arm main body 1354 extends into the space between the lower armature 1314 and the pushing seat 1331 and is opposite to the lower armature 1314.

[0080] It should be noted that when the support surface 1362 is formed on the support structure 136 of the first arm 1351, the support structure 136 can be integrally formed with other parts of the first arm 1351. The first arm 1351 as a whole can be made of any suitable metal material. In this way, the support structure 136 and other parts of the first arm 1351 have a certain elastic deformation ability. When the moving reed mechanism 131 switches to the third state, the elastic deformation ability between the support structure 136 and other parts of the first arm 1351 can assist in buffering part of the impact force of the moving reed mechanism 131, which is also beneficial to reducing the requirement for the holding force of the electromagnetic component 12.

[0081] Please refer to Figure 15 、 Figure 16 and Figure 17As shown, in some embodiments, the support surface 1362 may also be provided on the fixing piece 134 for connecting the pushing seat 1331 and the first support arm 1351. Figure 15 The structural schematic diagram of the electromagnetic assembly 12 in the initial state when the support surface 1362 is provided on the fixing piece 134 is shown. In this embodiment, for the relative relationship among the moving spring mechanism 131, the support surface 1362 and the pushing seat 1331 in other states, reference may be made to the above description and Figure 1 and Figures 4 - 6 obtained, which will not be elaborated here.

[0082] When the support surface 1362 is formed on the fixing piece 134, in some embodiments, the fixing piece 134 includes a sheet-like main body (not shown in the figure) and a support structure 136 and two connecting portions 1341 integrally connected to the sheet-like main body. The sheet-like main body is embedded in the pushing seat 1331. The sheet-like main body may be completely located within the pushing seat 1331, only exposing the side surface for connecting with the connecting portion 1341 and the support structure 136. Or, a part of the sheet-like main body may extend out of the pushing seat 1331 for connecting with the connecting portion 1341 and the support structure 136. The two connecting portions 1341 are respectively connected to the opposite two edges of the sheet-like main body and are both connected to the first support arm 1351. The support structure 136 may be bent relative to the sheet-like main body toward the side where the moving spring mechanism 131 is located. The support structure 136 protrudes from the side of the pushing seat 1331 facing the moving spring mechanism 131. The end surface of the support structure 136 facing the moving spring mechanism 131 forms the support surface 1362. By providing the support structure 136 with a part of the integral structure of the fixing piece 134, it is beneficial to improve the connection reliability between the support structure 136 and other components in the moving assembly 13.

[0083] In this embodiment, there may be only one support structure 136, and the support structure 136 and the two connecting portions 1341 are respectively located on three sides of the pushing seat 1331. And in Figures 15 - 17In the illustrated embodiment, the fixing piece 134 is provided with two supporting structures 136. The two supporting structures 136 are integrally connected to the sheet-shaped main body and are located on the opposite sides of the elastic element 132. The projection of the line connecting the two supporting structures 136 on the sheet-shaped main body is perpendicular to the projection of the line connecting the two connecting portions 1341. That is to say, when the pushing seat 1331 is substantially cubic, the two supporting structures 136 and the two connecting portions 1341 can be located on the four sides of the pushing seat 1331. In this embodiment, the two supporting structures 136 can respectively face the two end portions of the moving reed piece 1311 outside the lower armature 1314, which is beneficial to reasonably plan the layout of each part of the fixing piece 134, the pushing seat 1331, the moving reed mechanism 131 and other components, and improve the structural reliability and performance stability of the moving assembly 13. In this embodiment, a supporting structure 136 integrally formed with the sheet-shaped main body is separately provided on the fixing piece 134 to form a supporting surface 1362, which is beneficial to reducing the deviation of the spring distance size caused by the riveting process, improving the fitting accuracy between components, and thus improving the performance reliability of the high-voltage DC relay 10.

[0084] Please refer to Figure 18 , Figure 19 and Figure 20 As shown, when the supporting surface 1362 is formed on the fixing piece 134, in some other embodiments, the fixing piece 134 includes at least two connecting portions 1341. The at least two connecting portions 1341 are located on the opposite sides of the elastic element 132 and are both connected to the pushing seat 1331 and the bracket 135. The supporting surface 1362 is formed on at least one connecting portion 1341. In this embodiment, the connecting portion 1341 can be directly connected to the pushing seat 1331 or connected to the sheet-shaped main body embedded in the pushing seat 1331. The setting of the sheet-shaped main body can be obtained with reference to the above description.

[0085] In some embodiments, the connecting portion 1341 includes a first connecting plate 1342 and a second connecting plate 1343 that are connected to each other and intersect. The first connecting plate 1342 is connected to the pushing seat 1331, and the second connecting plate 1343 is connected to the bracket 135. A support surface 1362 is formed on the side of the second connecting plate 1343 facing the moving assembly 13. For example, the first arm 1351 of the bracket 135 is located outside the first connecting plate 1342. The first connecting plate 1342 and the first arm 1351 are substantially parallel and both perpendicular to the extending direction of the pushing seat 1331. The second connecting plate 1343 is substantially perpendicular to the first connecting plate 1342 and the first arm 1351. That is to say, the first connecting plate 1342, the second connecting plate 1343, and the first arm 1351 form a stepped structure, and the support surface 1362 corresponds to the step surface of the stepped structure. In this embodiment, the support surface 1362 can be directly opposite to the lower armature 1314, which is beneficial to adapting to the layout among the bracket 135, the pushing seat 1331, and the moving spring mechanism 131, and reducing the setting difficulty and cost of the support surface 1362. In this embodiment, by designing the shape of the connecting portion 1341 to form the support surface 1362 on the connecting portion 1341, it is beneficial to reduce the number of parts of the moving spring mechanism 131, simplify the forming process and consumables of the parts, and at the same time is beneficial to reducing the volume of the high-voltage DC relay 10. In addition, the connecting portion 1341 extends from the pushing seat 1331, which can extend the creepage distance of the connecting portion 1341 to the base 11, thereby improving the insulation performance of the pushing mechanism 133 and being beneficial to improving the safety performance of the high-voltage DC relay 10.

[0086] It can be understood that when the support surface 1362 is formed on the fixing piece 134, the fixing piece 134 as a whole can also be made of a metal material, and each part of the fixing piece 134 can be integrally formed, so that each part has a certain elastic deformation ability. Thus, during the process of switching from the second state to the third state, the elastic deformation ability between the parts of the fixing piece 134 can buffer part of the impact of the moving spring mechanism 131, which is beneficial to reducing the requirement for the holding force of the electromagnetic assembly 12 and reducing the volume and cost of the electromagnetic assembly 12.

[0087] Please refer to Figure 21 、 Figure 22 、 Figure 23 and Figure 24 as shown. In some embodiments, the support surface 1362 can also be formed on the pushing mechanism 133. Figure 21 FIG. shows a schematic structural diagram of the high-voltage DC relay 10 in the initial state when the support surface 1362 is formed on the pushing mechanism 133 in one of the embodiments. The relative relationships among the moving spring mechanism 131, the support surface 1362, and the pushing seat 1331 when the high-voltage DC relay 10 is in other states can be obtained with reference to the above description and will not be elaborated here.

[0088] In this embodiment, the pushing mechanism 133 further includes a support structure 136 provided on the side of the pushing seat 1331 facing the moving spring mechanism 131. A support surface 1362 is formed on the side of the support structure 136 facing the moving spring mechanism 131. The support structure 136 can be integrally formed with the pushing seat 1331 and the pushing rod 1332. The whole pushing mechanism 133 can be made of plastic material, with a simple preparation process and is beneficial to reducing the preparation cost.

[0089] In this embodiment, the support structure 136 is disposed around the elastic element 132 and is provided with a plurality of grooves 1361 facing the moving spring mechanism 131. The plurality of grooves 1361 are sequentially and spaced apart along the circumferential direction of the elastic element 132. The support structure 136 is located between two adjacent grooves 1361, and the part facing the moving spring mechanism 131 forms the support surface 1362. That is to say, the sides of two adjacent grooves 1361 are connected by the support surface 1362. The provision of the plurality of grooves 1361 can avoid structures such as the lower armature 1314, so that the support surface 1362 is directly opposite to the two end portions of the moving spring piece 1311 outside the lower armature 1314, to adapt to the layout of each element of the moving assembly 13, and at the same time is beneficial to reducing the material consumption of the support structure 136 and reducing the preparation cost of the moving assembly 13.

[0090] In some embodiments, the support structure 136 is provided with four support surfaces 1362. The four support surfaces 1362 are sequentially and spaced apart in the circumferential direction of the elastic element 132, and two of them are directly opposite to one end portion of the moving spring piece 1311 outside the upper armature 143. By providing a uniform support for the two end portions of the moving spring piece 1311, it is beneficial to improve the structural reliability of the moving assembly 13.

[0091] Of course, in some other embodiments, when the support structure 136 is disposed around the elastic element 132, the support structure 136 can also be formed with a support surface 1362 disposed around the elastic element 132. The support surface 1362 is substantially an annular surface, and the support surface 1362 can abut against the lower armature 1314 to support the moving spring mechanism 131. The provision of the annular support surface 1362 realizes multi-directional contact with the moving spring mechanism 131, and can further improve the structural reliability of the moving assembly 13.

[0092] Please refer to Figure 25 、 Figure 26 、 Figure 27 and Figure 28 , Figures 25 - 28 which illustrate another embodiment in which the support surface 1362 is formed on the bracket 135. Figure 25 Figure shows a schematic structural diagram of the high-voltage DC relay 10 in the initial state in this embodiment. The relative relationships among the moving spring mechanism 131, the support surface 1362, and the pushing seat 1331 in other states can be obtained with reference to the above records and will not be elaborated here.

[0093] In this embodiment, the moving spring mechanism 131 is formed with a sliding structure 1315. The first arm 1351 of the bracket 135 is provided with a chute 1356. At least a part of the sliding structure 1315 is slidably disposed in the chute 1356. The side wall of the chute 1356 is located on the side of the sliding structure 1315 facing the pushing seat 1331, and the part opposite to the sliding structure 1315 forms a supporting surface 1362. The supporting surface 1362 abuts against the sliding structure 1315 on the path of the moving spring mechanism 131 moving towards the pushing seat 1331 to realize the supporting effect on the moving spring mechanism 131. By means of the chute 1356 that realizes the sliding fit between the sliding structure 1315 of the moving spring mechanism 131 and the first arm 1351 to form the supporting surface 1362, while improving the reliability of the guiding and limiting effects of the bracket 135 on the moving spring mechanism 131, it is beneficial to improve the structural utilization efficiency of the moving component 13 and compress the occupied space and setting cost of the moving component 13.

[0094] In this embodiment, both of the two first arms 1351 can be provided with chutes 1356. The moving spring mechanism 131 is provided with two sliding structures 1315. The two sliding structures 1315 respectively protrude towards the two first arms 1351 and are respectively slidably disposed in the corresponding chutes 1356. The two first arms 1351 respectively form supporting surfaces 1362 located on the opposite sides of the moving spring piece 1311. Providing the supporting and guiding effects on the moving spring mechanism 131 on the opposite sides of the moving spring piece 1311 can improve the stability and reliability of the support and guidance. When the moving spring mechanism 131 is provided with a lower armature 1314, the sliding structure 1315 can protrude from one side or the opposite sides of the upper armature 143 facing the first arm 1351, or can protrude from one side or the opposite sides of the moving spring piece 1311 facing the first arm 1351. When the moving spring mechanism 131 is not provided with a lower armature 1314, the sliding structure 1315 can protrude from one side or the opposite sides of the moving spring piece 1311 facing the first arm 1351. The sliding structure 1315 can be integrally formed with the moving spring piece 1311 or the lower armature 1314.

[0095] Combined Figure 25 and Figure 29 as shown Figure 29The schematic structural diagram shows the upper armature 143 disposed on the static contact 14 when the support surface 1362 is formed within the chute 1356 of the bracket 135. When the upper armature 143 is disposed on the insulating cover 142, the upper armature 143 can be correspondingly arranged with respect to the static contact point 141 and is located between the insulating cover 142 and the moving reed 1311. Then, the upper armature 143 can further limit the moving reed mechanism 131 on the side of the moving reed mechanism 131 facing away from the pushing seat 1331, defining the extreme position where the moving reed mechanism 131 moves away from the pushing seat 1331. Thus, when the upper armature 143 is disposed on the insulating cover 142, the second arm 1357 of the bracket 135 of the moving assembly 13 can be omitted, and only two first arms 1351 are provided to be connected to the pushing seat 1331 and are located on the opposite sides of the moving reed mechanism 131. Of course, when the upper armature 143 is disposed on the insulating cover 142, the upper armature 143 and the moving reed 1311 can also be spaced apart by the second arm 1357 of the bracket 135, and then the second arm 1357 defines the extreme position where the moving reed mechanism 131 moves away from the pushing seat 1331. In any of the embodiments of the different formation methods of the support surface 1362 mentioned above, the upper armature 143 can also be disposed on the bracket 135 or on the insulating cover 142 of the static contact 14.

[0096] Please refer to Figure 30 and Figure 31 , Figure 30 and Figure 31 The schematic diagram shows one of the embodiments in which the support surface 1362 is formed on the pushing mechanism 133. The moving reed 1311 can include two sub-reeds 1312 arranged in parallel and spaced apart from each other. Then, when the moving reed mechanism 131 is provided with a lower armature 1314, the lower armature 1314 can be simultaneously connected to the two sub-reeds 1312. The lower armature 1314 can also include two sub-armatures spaced apart, and the two sub-armatures are correspondingly connected to the two sub-reeds 1312 one by one. Each moving contact point 1313 of the moving reed 1311 can be jointly formed by the corresponding positions of the two sub-reeds 1312. With such an arrangement, the two sub-reeds 1312 can provide more stable electrical contact, reduce the poor contact caused by the wear or damage of a single reed, can also share the mechanical load of the moving contact point 1313, reduce the stress of a single reed, improve the durability of the high-voltage DC relay 10, can also provide a more uniform current distribution, reduce the arc phenomenon and contact resistance, and improve the electrical contact performance. And when one of the sub-reeds 1312 fails, the other sub-reed 1312 can still realize the on-off control of the circuit with the static contact point 141, improving the performance reliability of the high-voltage DC relay 10. Of course, in any other embodiments where the support surface 1362 is formed on other components or positions, the moving reed 1311 can be an integral body or provided with two sub-reeds 1312, as long as it does not affect the supporting effect of the support surface 1362 on the moving reed mechanism 131, which will not be elaborated here.

[0097] In the present application, the elastic element 132 includes, but is not limited to, any applicable elastic components such as springs and compression springs. The connection arrangement and orientation arrangement between the elastic element 132, the moving contact mechanism 131, and the pushing mechanism 133 are also not limited, as long as the elastic cooperation between the moving contact mechanism 131 and the pushing mechanism 133 can be achieved to buffer the moving contact mechanism 131 during the process of switching from the second state to the third state.

[0098] Of course, when the supporting surface 1362 is formed on the bracket 135, there can be other setting methods for the supporting surface 1362. The following gives examples of the supporting surface 1362 formed on the bracket 135 in some other embodiments. Please refer to Figure 32 and Figure 33 As shown, in some embodiments, the bracket 135 may include a connecting body 1358 and a supporting structure 136. The connecting body 1358 can be connected to the pushing seat 1331, for example, at least partially embedded in the pushing seat 1331. Two first support arms 1351 are connected to both ends of the connecting body 1358. The supporting structure 136 is connected to the side of the connecting body 1358 facing the moving contact mechanism 131 and is located between the two first support arms 1351. The first support arms 1351, the connecting body 1358, and the supporting structure 136 can be integrally formed. The supporting structure 136 faces the moving contact mechanism 131, that is, the side facing away from the connecting body 1358 forms the supporting surface 1362. The supporting structure 1362 can be generally in a hollow cylindrical shape, such as a hollow cylindrical shape, to form an annular supporting surface 1362. Then the supporting surface 1362 can be generally annular, and the supporting surface 1362 can be opposite to the lower armature 1314 to adapt to the spatial layout of the lower armature 1314 and the moving contact piece 1311. In this embodiment, one end of the elastic element 132 close to the connecting body 1358 can be sleeved on the supporting structure 1362, which is beneficial for the assembly and positioning of the elastic element 132 and also beneficial for ensuring that when the supporting surface 1362 supports the moving contact mechanism 131, the length of the elastic element 132 is greater than the limit compression length.

[0099] Please refer to Figure 34 and Figure 35As shown, in some embodiments, when the first arm 1351 includes a first body 1352, a second body 1353, and a support structure 136, the portion of the first body 1352 away from the support structure 136 is the first portion of the first body 1352. The first portion can be substantially parallel to the second body 1353 and slidably cooperate with the moving spring mechanism 131. The portion of the first body 1352 close to and connected to the support structure 136 is the second portion of the first body 1352. The second portion can be inclined with respect to the support structure 136, as long as the support structure 136 can form a support surface 1362 inside the first body 1352 to meet the support requirements of the moving spring mechanism 131. In this embodiment, the connection relationship among the first body 1352, the second body 1353, and the support structure 136 can be referred to Figure 1 and Figure 2 the embodiments shown, and will not be elaborated here.

[0100] Please refer to Figure 36 and Figure 37 As shown, in some embodiments, the bracket 135 includes a connecting body 1358 and a support structure 136. The connecting body 1358 can be connected to the pushing seat 1331, for example, at least partially embedded in the pushing seat 1331. Two first arms 1351 are connected to both ends of the connecting body 1358. The support structure 136 is spaced apart from the first arm 1351 and connected to the edge of the connecting body 1358. The support structure 1351 is located outside the elastic element 132 in the axial direction. The support structure 1351 can include two connected parts that are substantially in an inverted L shape. One part is connected to the connecting body 1358 and is substantially perpendicular to the connecting body 1358, and the other part is connected to the connecting body 1358 and is substantially parallel to the connecting body 1358. The part of the support structure 1351 parallel to the connecting body 1358 faces the moving spring mechanism 131, that is, the surface facing away from the connecting body 1358 forms the support surface 1362. In this embodiment, the support surface 1362 can face the moving spring piece 1311 or the lower armature 1314. There can be two support structures 136. The two support structures 136 are respectively connected to opposite edges of the connecting body 1358 and are respectively located on opposite sides of the elastic element 132 in the axial direction. The connection line of the two support structures 136 can intersect with the projection of the connection line of the two first arms 1351 on the connecting body 1358, for example, be perpendicular, so as to reasonably arrange the layout of each component and avoid interference among the components.

[0101] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered to be within the scope described in this specification.

[0102] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patented application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A high voltage DC relay, characterized in that: include: A stationary contactor is provided with a stationary contact point; A dynamic assembly, comprising a pushing mechanism, a dynamic spring mechanism and an elastic element, wherein the dynamic spring mechanism is provided with a dynamic contact point opposite to the static contact point, and the dynamic spring mechanism is elastically matched with the pushing mechanism through the elastic element; The movable assembly is formed with a support surface, which is spaced apart from the movable spring mechanism. The support surface is used to support the movable spring mechanism on a path where the movable spring mechanism moves away from the static contact when a short circuit current occurs and causes the movable contact and the static contact to bounce apart.

2. The high voltage DC relay according to claim 1, characterized in that: The pushing mechanism can drive the moving spring mechanism to move in a direction approaching the static contact, so that the moving component has a first state and a second state. In the first state, the moving contact is just in contact with the static contact. In the second state, the moving contact is pressed against the static contact by the elastic element. The moving spring mechanism is spaced apart from the supporting surface. In the process of switching from the first state to the second state, the pushing mechanism moves relative to the moving spring mechanism in a direction approaching the static contact. The distance between the moving spring mechanism and the supporting surface in the second state is smaller than that in the first state.

3. The high voltage DC relay according to claim 2, characterized in that: In the second state, the difference between the length of the elastic element and the limit compression length of the elastic element is greater than the distance between the dynamic spring mechanism and the supporting surface.

4. The high voltage DC relay according to claim 2, characterized in that: When a short circuit current occurs, the moving contact can bounce away from the static contact under the action of the electric repulsive force to switch from the second state to the third state. In the third state, the supporting surface abuts against the dynamic spring mechanism so that the dynamic spring mechanism and the pushing mechanism are relatively fixed, and the length of the elastic element is greater than the limit compression length.

5. The high voltage DC relay according to claim 2, characterized in that: The movable spring mechanism comprises a relatively fixed lower armature and a movable spring piece, the movable contact is arranged on the side of the movable spring piece facing the static contact, and the supporting surface can abut against the lower armature and / or the movable spring piece on the path of the movable spring mechanism moving toward the pushing mechanism.

6. The high voltage DC relay according to claim 5, characterized in that: The high-voltage DC relay also includes an upper armature opposite to the lower armature, and when the moving contact and the static contact are in contact, the upper armature and the lower armature can attract each other; wherein, the moving component also includes a bracket that slides with the moving spring mechanism, and the upper armature is arranged on the bracket, or the upper armature is arranged outside the moving component and fixed relative to the static contact.

7. The high voltage DC relay according to claim 6, characterized in that: When the upper armature is disposed on the bracket, in the first state, the upper armature is in contact with the lower armature, and in the second state, the upper armature is spaced apart from the lower armature.

8. The high voltage DC relay according to any one of claims 1 to 7, characterized in that: The moving assembly is formed with at least two supporting surfaces, and the at least two supporting surfaces are located on two opposite sides of the elastic element in the axial direction.

9. The high voltage DC relay according to any one of claims 1 to 7, characterized in that: The high-voltage DC relay also includes a base and an electromagnetic assembly, the static contact of the electromagnetic assembly is arranged on the base, the pushing mechanism includes a pushing seat and a pushing rod arranged on the side of the pushing seat facing away from the dynamic spring mechanism, the pushing rod is inserted into the electromagnetic assembly, and the electromagnetic assembly is used to drive the pushing seat to move toward or away from the static contact through the pushing rod.

10. The high voltage DC relay according to claim 9, characterized in that: The elastic element is arranged between the pushing seat and the dynamic spring mechanism, and two ends of the elastic element are respectively in contact with the dynamic spring mechanism and the pushing seat.

11. The high voltage DC relay according to claim 9, characterized in that: The supporting surface is located between the dynamic spring mechanism and the pushing seat, and is spaced apart from the dynamic spring mechanism and the pushing seat.

12. The high voltage DC relay according to any one of claims 1 to 7, characterized in that: The pushing mechanism includes a pushing seat and a pushing rod connected to each other, and the dynamic component also includes a bracket and a fixing plate connected to the bracket and the pushing seat, and the bracket is slidably matched with the dynamic spring mechanism, wherein the supporting surface is formed on the bracket, the fixing plate and / or the pushing mechanism.

13. The high voltage DC relay according to claim 12, characterized in that: The bracket includes two first arms, which are respectively located on two opposite sides of the elastic element in the axial direction and are both connected to the pushing seat. The supporting surface is formed on at least one of the first arms.

14. The high voltage DC relay according to claim 13, characterized in that: The first support arm includes an integrally formed support arm body and a support structure, at least a portion of the support structure is located on a side of the support arm body facing the dynamic spring mechanism, and a side of the support structure facing the dynamic spring mechanism forms the support surface.

15. The high voltage DC relay according to claim 14, characterized in that: The first support arm is provided with two support structures, and the two support structures are respectively connected to two opposite edges of the support arm body; Alternatively, the arm body is provided with a through hole, and the support structure is connected to the arm body in the through hole.

16. The high voltage DC relay according to claim 13, characterized in that: The first arm includes an integrally formed first body, a second body and a supporting structure, the first body slidingly cooperates with the dynamic spring mechanism, the second body is connected to the pushing seat, the supporting structure is connected to the first body and the second body, and intersects with the first body and the second body, and the supporting structure forms the supporting surface on the side facing the dynamic spring mechanism.

17. The high voltage DC relay according to claim 16, characterized in that: The first body is located outside the second body, and the first body, the supporting structure and the second body form a step structure.

18. The high voltage DC relay according to claim 16, characterized in that: The first body has a first part and a second part that are connected to each other, the first part is slidably matched with the dynamic spring mechanism, the second part is connected to the supporting structure and inclined to the supporting structure, and the part of the supporting structure that faces one side of the dynamic spring mechanism and is located on the inner side of the first body forms the supporting surface.

19. The high voltage DC relay according to claim 12, characterized in that: The bracket includes an integrally formed connecting body, a supporting structure and two first supporting arms. The connecting body is arranged on the pushing seat. The two first supporting arms are respectively connected to two opposite edges of the connecting body and slidingly cooperate with the dynamic spring mechanism. The supporting structure is arranged on the connecting body and located between the two first supporting arms. The supporting structure protrudes from a side of the pushing seat facing the dynamic spring mechanism, and the side of the supporting structure facing the dynamic spring mechanism forms the supporting surface.

20. The high voltage DC relay according to claim 19, characterized in that: The supporting structure is substantially cylindrical, and one end of the elastic element is sleeved on the supporting structure; and / or, The support structure is substantially in the shape of a hollow cylinder to form a circular ring-shaped support surface.

21. The high voltage DC relay according to claim 12, characterized in that: The bracket includes an integrally formed connecting body, a supporting structure and two first supporting arms. The connecting body is arranged on the pushing seat. The two first supporting arms are respectively connected to two opposite edges of the connecting body and slidably cooperate with the dynamic spring mechanism. The supporting structure is spaced apart from the first supporting arms and connected to the edge of the connecting body. The supporting structure is located on the outer side of the elastic element in the axial direction, and the surface of the supporting structure facing the dynamic spring mechanism forms the supporting surface.

22. The high voltage DC relay according to claim 21, characterized in that: There are two support structures, which are respectively connected to the two opposite edges of the connecting body and are respectively located on the two sides of the elastic element that are opposite to each other in the circumferential direction. The line connecting the two support structures intersects with the projection of the line connecting the two first arms on the connecting body.

23. The high voltage DC relay according to claim 12, characterized in that: The fixing plate includes at least two connecting parts, and the at least two connecting parts are located on two opposite sides of the elastic element in the axial direction and are both connected to the pushing seat and the bracket. The supporting surface is formed on at least one of the connecting parts.

24. The high voltage DC relay according to claim 23, characterized in that: The connecting portion includes a first connecting plate and a second connecting plate that are integrally formed and intersecting, the first connecting plate is connected to the pushing seat, the second connecting plate is connected to the bracket, and the second connecting plate forms the supporting surface on a side facing the moving component.

25. The high voltage DC relay according to claim 24, characterized in that: At least a portion of the bracket is located outside the first connecting plate, and the first connecting plate, the second connecting plate and a portion of the bracket form a step structure.

26. The high voltage DC relay according to claim 12, characterized in that: The fixing sheet includes a sheet-like body, a supporting structure integrally formed with the sheet-like body, and two connecting parts. The sheet-like body is embedded in the pushing seat. The two connecting parts are respectively connected to the two opposite edges of the sheet-like body and are both connected to the bracket. The supporting structure protrudes from the side of the pushing seat facing the dynamic spring mechanism, and the supporting surface is formed on the side of the supporting structure facing the dynamic spring mechanism.

27. The high voltage DC relay according to claim 26, characterized in that: The fixing plate is provided with two supporting structures, which are located on two opposite sides of the elastic element in the axial direction, and the projection of the connecting line of the two supporting structures and the connecting line of the two connecting parts on the sheet-like body intersects.

28. The high voltage DC relay according to claim 12, characterized in that: The pushing mechanism further comprises a supporting structure integrally formed with the pushing seat, the supporting structure being arranged on a side of the pushing seat facing the dynamic spring mechanism, and the side of the supporting structure facing the dynamic spring mechanism forming the supporting surface.

29. The high voltage DC relay according to claim 28, characterized in that: The supporting structure is arranged around the elastic element, wherein the supporting structure is formed with the supporting surface arranged around the elastic element.

30. The high voltage DC relay according to claim 28, characterized in that: The support structure is arranged around the elastic element and is provided with a plurality of grooves arranged toward the dynamic spring mechanism. The plurality of grooves are arranged in sequence and spaced apart along the circumference of the elastic element, and the side walls of two adjacent grooves are connected through the support surface.

31. The high voltage DC relay according to claim 12, characterized in that: The dynamic spring mechanism forms a sliding structure, the bracket is provided with a sliding groove, the sliding structure is at least partially slidably arranged in the sliding groove, and the side wall of the sliding groove is located on the side of the sliding structure facing the pushing seat and the part opposite to the sliding structure forms the supporting surface.

32. The high voltage DC relay according to claim 31, characterized in that: The movable spring mechanism includes a relatively fixed lower armature and a movable spring piece, the movable contact is arranged on the side of the movable spring piece facing the static contact, the sliding structure is protruded on the side of the lower armature facing the bracket and is integrally formed with the lower armature, and / or the sliding structure is protruded on the side of the movable spring piece facing the bracket and is integrally formed with the movable spring piece.

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