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 moving assembly. The static contact 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 pushing mechanism comprises a pushing seat, a pushing rod and a supporting structure, the pushing rod and the supporting structure are connected to the pushing seat, and the movable spring mechanism is arranged on the side, opposite to the pushing seat, of the supporting structure and is provided with a movable contact opposite to the static contact; the movable spring mechanism is elastically matched with the pushing mechanism through the elastic element, the support is connected to the pushing seat and is in sliding fit with the movable spring mechanism, and the supporting structure is provided with a supporting face which is arranged with the movable spring mechanism in a spaced mode. And the supporting surface can support the movable spring mechanism on a path in which the movable spring mechanism moves away from the static contact. 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] The present application relates to the technical field of relays, and particularly to a high-voltage direct-current relay. Background Art

[0002] As a new type of electric automatic switch, a high-voltage direct-current relay can achieve a normally open state or a normally closed state through electromagnetic holding force. Currently, a high-voltage direct-current 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 direct-current 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, so that the second iron core attracts the first iron core, thereby driving the moving component close to the static contact until the moving contact on the moving component contacts the static contact on the static contact, realizing the conduction of the circuit. However, in the current high-voltage direct-current relay, when a short circuit or overload occurs in the circuit, the moving contact and the static contact will bounce off due to the electric 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 adopt high-voltage circuits, the demand for miniaturization and short-circuit resistance of high-voltage direct-current relays is increasing day by day. Summary of the Invention

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

[0004] A high-voltage direct-current relay, characterized by comprising:

[0005] An insulating cover;

[0006] A static contact provided with a static contact, the static contact is fixed relative to the insulating cover, and the side of the static contact facing away from the static contact extends out of the outside of the insulating cover; and,

[0007] A moving component, including a pushing mechanism, a moving reed mechanism, an elastic element, and a bracket. The pushing mechanism includes a pushing seat, a pushing rod connected to the pushing seat, and a supporting structure. The moving reed mechanism is arranged on the side of the supporting structure facing away from the pushing seat and is provided with a moving contact opposite to the static contact. The moving reed mechanism is elastically matched with the pushing mechanism through the elastic element. The bracket is connected to the pushing seat and is slidably matched with the moving reed mechanism;

[0008] The supporting structure has a supporting surface spaced from the moving reed mechanism. The supporting 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.

[0009] In the above-mentioned high-voltage DC relay, the support structure of the driving mechanism is formed with a support surface that can support the moving contact mechanism on the path where the moving contact mechanism moves away from the static contact. When the circuit connected to the high-voltage DC relay is short-circuited or overloaded, the moving contact of the moving contact mechanism and the static contact of the static contact are separated due to the electro-dynamic repulsion force. The moving contact mechanism can first compress the elastic element until the support surface supports the moving contact mechanism so that the moving contact mechanism is relatively fixed with the driving mechanism. Since the electro-dynamic repulsion force between the moving contact and the static contact disappears after they are separated, during the process of the moving contact mechanism moving away from the static contact to the support surface, the elastic element can effectively buffer the kinetic energy of the moving contact mechanism, and the elastic element will not be compressed to the limit compression length. When the support surface supports the moving contact mechanism, the impact of the moving contact mechanism on the driving mechanism will not be too large, avoiding damage to the high-voltage DC relay caused by excessive impact resulting in the overall separation of the moving component from the static contact. Moreover, the support of the support surface on the moving contact mechanism makes the moving contact mechanism no longer move further away from the static contact, and the distance between the moving contact mechanism and the driving mechanism is still greater than the limit compression length of the elastic element, which is beneficial to reducing the relative separation 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, making the distance between the moving contact and the static contact not too far, thus 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 on the moving contact mechanism can also reduce the holding force requirement 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, and thus is beneficial to the miniaturization design of the high-voltage DC relay.

[0010] In one embodiment, the support structure is disposed around the elastic element, and the support surface is formed on the side of the support structure facing the moving contact mechanism.

[0011] In one embodiment, the support surface is disposed around the elastic element.

[0012] In one embodiment, the support structure is provided with a plurality of grooves disposed towards the moving contact mechanism, and the plurality of grooves are sequentially spaced along the circumferential direction of the elastic element, and the side walls of two adjacent grooves are connected by the support surface.

[0013] In one embodiment, the push seat, the push rod and the support structure are integrally formed.

[0014] In one embodiment, the pushing mechanism can drive the moving spring mechanism to move towards the static contact, so that the moving component has a first state and a second state. In the first state, the moving contact just contacts the static contact. In the second state, the moving contact is pressed against the static contact by the elastic element, and the moving spring mechanism is spaced apart from the supporting surface. During the process of switching from the first state to the second state, the pushing mechanism moves towards the static contact relative to the moving spring mechanism, and the distance between the moving spring mechanism and the supporting surface in the second state is smaller than that in the first state.

[0015] 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 supporting surface.

[0016] In one embodiment, the moving contact can bounce relative to 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 moving spring mechanism so that the moving spring mechanism and the pushing mechanism are relatively fixed, and the length of the elastic element is greater than the ultimate compression length.

[0017] In one embodiment, the moving spring mechanism includes a relatively fixed lower armature and a moving spring piece, and the moving contact is arranged on the side of the moving spring piece facing the static contact. Wherein, the supporting surface faces the lower armature, and / or the supporting surface faces the moving spring piece.

[0018] In one embodiment, the high-voltage DC relay further includes an upper armature opposite to the lower armature. When the moving contact and the static contact are in contact, the upper armature and the lower armature can attract each other; wherein, the upper armature is arranged on the bracket, or the upper armature is arranged outside the moving component and is relatively fixed to the static contact.

[0019] In one embodiment, when the upper armature is arranged on the bracket, in the first state, the upper armature and the lower armature are in contact, and in the second state, the upper armature and the lower armature are spaced apart.

[0020] In one embodiment, the high-voltage DC relay further includes a base and an electromagnetic component. The electromagnetic component and the static contact are arranged on the base. The pushing mechanism includes a pushing seat connected to the bracket and a pushing rod arranged on 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 is used to drive the pushing seat to move towards or away from the static contact through the pushing rod.

[0021] In one embodiment, the elastic element is disposed between the pushing seat and the moving spring mechanism, and both ends thereof are respectively abutted against the moving spring mechanism and the pushing seat.

[0022] In one embodiment, the supporting surface is located between the moving spring mechanism and the pushing seat, and is spaced apart from the moving spring mechanism and the pushing seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 FIG. is a schematic structural diagram of a high-voltage DC relay in an initial state in some embodiments.

[0024] Figure 2 FIG. is Figure 1 a schematic structural diagram of a moving component in the high-voltage DC relay shown.

[0025] Figure 3 FIG. is Figure 2 an exploded schematic diagram of the moving component shown.

[0026] Figure 4 FIG. is Figure 1 a schematic structural diagram of the high-voltage DC relay in a first state shown.

[0027] Figure 5 FIG. is Figure 1 a schematic structural diagram of the high-voltage DC relay in a second state shown.

[0028] Figure 6 FIG. is Figure 1 a schematic structural diagram of the high-voltage DC relay in a third state shown.

[0029] Figure 7 FIG. is Figure 2 a schematic structural diagram of another angle of the moving component shown.

[0030] Figure 8 FIG. is a schematic structural diagram of a moving component in which the moving spring piece includes two sub-spring pieces in some embodiments.

[0031] Figure 9 FIG. is Figure 8 a schematic structural diagram of another angle of the moving component shown.

[0032] Reference Numerals:

[0033] 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; 132. Elastic element; 133. Pushing mechanism; 1331. Pushing seat; 1332. Pushing rod; 134. Fixed piece; 135. Bracket; 1351. First arm; 1357. Second arm; 136. Support structure; 1361. Groove; 1362. Support surface; 14. Static contact; 141. Static contact point; 142. Insulating cover; 143. Upper armature. Detailed implementation manners

[0034] To make the above objects, features, and advantages of the present application more apparent and understandable, the following will describe in detail the specific implementation manners of the present application with reference to 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.

[0035] 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 drawings, and is 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 of the present application.

[0036] In addition, if there are terms such as "first" and "second", these terms are only used for descriptive purposes 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 of such features. In the description of the present application, if there is a term "plural", the meaning of "plural" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0037] In this application, unless otherwise clearly stipulated or defined, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. 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.

[0038] In this application, unless otherwise clearly stipulated or defined, if there is a description such as a first feature being "on" or "under" a second feature, its meaning may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal level than the second feature.

[0039] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected" to another element, it may 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.

[0040] As the application of high-voltage DC relays becomes more and more extensive in equipment in various fields, the industry's requirements for the anti-heat loss, anti-short-circuit circuit, 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 electrodynamic 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 limit 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 detached 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 improve the holding force of the electromagnetic component on the moving component to avoid the detachment of the electromagnetic component due to insufficient holding force 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.

[0041] Based on the above problems, the present application provides a high-voltage DC relay.

[0042] Please refer to Figure 1 、 Figure 2 and Figure 3 , Figure 1 which are the structural schematic diagrams of the high-voltage DC relay 10 in some embodiments, Figure 2 and the structural schematic diagram of the moving component 13 in some embodiments, 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 disposed on the base 11, and the static contact 14 is disposed 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, and the moving spring mechanism 131 is elastically connected to the pushing mechanism 133 through the elastic element 132. The electromagnetic component 12 is disposed 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 in 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 open. 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 closed. 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 can be led out to the outside of the housing through conductive structures such as electrodes and leads for electrical connection 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.

[0043] 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 in the circuits of other any applicable devices as a switching element, which will not be elaborated in the present application.

[0044] 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 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 may both be disposed within the base 11. The pushing rod 1332 passes through the upper iron core 121 and is inserted into the lower iron core 122, and the pushing 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, such that the upper iron core 121 and the lower iron core 122 attract each other and the lower iron core 122 moves in a direction closer to the upper iron core 121, thereby driving the pushing rod 1332 to drive the moving assembly 13 as a whole to move in a direction closer to the stationary contact 141.

[0045] In some embodiments, the moving assembly 13 further includes a bracket 135. The bracket 135 is connected to the pushing 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 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 pushing 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 pushing seat 1331. The two first arms 1351 are slidably engaged with the moving spring mechanism 131 on opposite sides of the moving spring mechanism 131, which can enable the moving spring mechanism 131 to move relative to the pushing seat 1331 in a direction closer to or away from the stationary 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 pushing 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 pushing seat 1331 on the side of the moving spring mechanism 131 facing the stationary contact 141, preventing the moving spring mechanism 131 from detaching from the pushing seat 1331 and improving the performance stability of the high-voltage DC relay 10.

[0046] Further, in some embodiments, the pushing mechanism 133 further includes a support structure 136 disposed 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 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 support surface 1362 can support the moving spring mechanism 131 on the path of the moving spring mechanism 131 moving towards the pushing seat 1331. In this application, the state where the moving contact 1313 and the static contact 141 are spaced apart and the electromagnetic assembly 12 does not exert a force on 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 support 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 through the pushing rod 1332, and then drive the moving spring mechanism 131 to move towards the static contact 141, so that the moving assembly 13 has a first state and a second state. Combining Figure 4 and Figure 5 As shown, when the moving assembly 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.

[0047] 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 is in contact with 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 applied by the elastic element 132 to 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.

[0048] 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 apart from the upper iron core 121, and in the second state, the lower iron core 122 can just be in contact with the upper iron core 121, which is beneficial to improving the magnetic attraction between the upper iron core 121 and the lower iron core 122, thereby improving the holding force of the electromagnetic component 12 on the moving component 13.

[0049] 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 apart from the moving spring mechanism 131, and the distance between the moving spring mechanism 131 and the supporting surface 1362 is smaller in the second state than 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 by the elastic element 132 on the moving contact 1313 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.

[0050] 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 of the movement of the moving spring mechanism 131 caused by the setting of the supporting surface 1362, increasing the risks of jamming, uneven force or wear and chip generation 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.

[0051] For the above-mentioned high-voltage DC relay 10, the support structure 136 of the driving mechanism 133 is formed with a support surface 1362 that can support the moving contact mechanism 131 on the path of the moving contact mechanism 131 moving towards the driving 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 contact mechanism 131 and the static contact 141 of the static contact 14 bounce off due to the electro-dynamic repulsive force. The moving contact mechanism 131 can first compress the elastic element 132 until the support surface 1362 supports the moving contact mechanism 131 so that the moving contact mechanism 131 and the driving mechanism 133 are relatively fixed. Since the electro-dynamic repulsive force between the moving contact 1313 and the static contact 141 disappears after the moving contact 1313 and the static contact 141 bounce off, during the process of the moving contact mechanism 131 moving away from the static contact 141 towards the support surface 1362, the elastic element 132 can effectively buffer the kinetic energy of the moving contact mechanism 131, and the elastic element 132 will not be compressed to the ultimate compression length, so that when the support surface 1362 supports the moving contact mechanism 131, the impact of the moving contact mechanism 131 on the driving mechanism 133 and the electromagnetic assembly 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 assembly 13 and the electromagnetic assembly 12 from the static contact 14. Moreover, the support of the support surface 1362 on the moving contact mechanism 131 prevents the moving contact mechanism 131 from moving further away from the static contact 141, and the distance between the moving contact mechanism 131 and the driving seat 1331 is still greater than the ultimate compression length of the elastic element 132, which is beneficial to reducing the relative bouncing distance between the moving contact 1313 and the static contact 141. The design of cooperating with the buffering of the elastic element 132 to prevent the moving assembly 13 from detaching from the static contact 14 makes the distance between the moving contact 1313 and the static contact 141 not too far, thus helping to avoid the generation of excessive heat due to arcing between the moving contact 1313 and the static contact 141, which may cause damage or even explosion of the high-voltage DC relay 10. Additionally, the buffering of the elastic element 132 on the moving contact mechanism 131 can also reduce the requirement for the holding force of the moving assembly 13 on the electromagnetic assembly 12, enabling the iron core of the electromagnetic assembly 12 to support the entire moving assembly 13 with a smaller holding force, which is beneficial to reducing the number of turns of the coil winding of the electromagnetic assembly 12 and / or the volume of the iron core, thus facilitating the miniaturization design of the high-voltage DC relay 10.

[0052] In some embodiments, the elastic element 132 is disposed between the pushing seat 1331 and the moving spring mechanism 131, and both 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 component 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 high temperature and ablation splashes on the elastic element 132, 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 high temperature and ablation splashes on the supporting surface 1362. For example, it can prevent the distance between the supporting surface 1362 and the moving spring mechanism 131 from being reduced due to splashes, which may affect the switching from the second state to the third state.

[0053] 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 assembly 12 bears the impact of the moving spring mechanism 131, which is beneficial to reducing the requirement for the holding force of the electromagnetic assembly 12, beneficial to reducing the cost and volume of the electromagnetic assembly 12, and at the same time, it can also reduce the bounce distance between the moving contact 1313 and the static contact 141, thereby reducing the heat generated by the arc phenomenon. The high-voltage DC relay 10 can achieve the effects of small volume, low cost, and high short-circuit current and voltage resistance.

[0054] In some embodiments, in combination with Figure 5 and Figure 7As 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 the side of the moving spring piece 1311 facing the static contact 14. The upper armature 143 and the lower armature 1314 together 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, or 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 provided on the insulating cover 142, and the side of the static contact 14 facing away from the moving spring mechanism 131, that is, the side facing away from the static contact 141, protrudes outside the insulating cover 142. When the moving contact 1313 and the static contact 141 are in contact, the magnetic fields 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, facilitating the reduction of the holding force required by the electromagnetic assembly 12, and also facilitating the reduction of the cost and volume of the electromagnetic assembly 12.

[0055] In some embodiments, when the upper armature 143 is disposed on the insulating cover 142, the upper armature 143 can be disposed corresponding to the static contact 141 and located between the insulating cover 142 and the moving spring piece 1311. Then, 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 pushing seat 1331, defining the limit position of the moving spring mechanism 131 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 located on the opposite sides of the moving spring mechanism 131. Of course, when the upper armature 143 is disposed on the insulating cover 142, the upper armature 143 and the moving spring piece 1311 can also be spaced apart by the second arm 1357 of the bracket 135, and then the second arm 1357 defines the limit position of the moving spring mechanism 131 away from the pushing seat 1331.

[0056] Combined Figure 5 and Figure 6As shown, when the high-voltage DC relay 10 is provided with a short-circuit ring structure, the support 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 path of the moving reed mechanism 131 moving 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 support surfaces 1362, and the multiple support surfaces 1362 face the moving reed 1311 and the upper armature 143 respectively. The support surface 1362 can abut against the moving reed 1311 and the upper armature 143 simultaneously 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 support surfaces 1362. The at least two support surfaces 1362 are located on the axially opposite sides of the elastic element 132. The at least two support surfaces 1362 can face either the moving reed 1311 or the upper armature 143 simultaneously, or can face the moving reed 1311 and the upper armature 143 respectively. Setting at least two opposite support 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 avoid the yaw of the moving reed mechanism 131. Of course, the short-circuit ring structure can also be omitted, and both sides of the moving reed 1311 can abut against the second arm 1357 and the elastic element 132 respectively.

[0057] 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.

[0058] 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. It can also be that 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 guiding and limiting effects on the movement of the moving spring mechanism 131 relative to the pushing seat 1331.

[0059] In some embodiments, the bracket 135 can be directly connected to the pushing seat 1331, and 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 forming structure and forming position of the supporting surface 1362 are not limited, as long as it can provide a supporting effect on the moving component 13 on the path of the moving component 13 moving towards the pushing seat 1331. The following gives some embodiments in which the pushing mechanism 133 forms the supporting surface 1362.

[0060] Please refer to Figure 1 、 Figure 2 and Figure 3 As shown, in some embodiments, the supporting structure 136 is arranged 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 supporting structure 136 is located between two adjacent grooves 1361, and the part facing the moving spring mechanism 131 forms the supporting surface 1362. That is to say, the side surfaces of two adjacent grooves 1361 are connected by the supporting surface 1362. Setting the plurality of grooves 1361 can avoid structures such as the lower armature 1314, so that the supporting 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 component of the moving component 13, and at the same time is beneficial to reducing the consumption of materials of the supporting structure 136 and reducing the manufacturing cost of the moving component 13.

[0061] In some embodiments, the supporting structure 136 is provided with four supporting surfaces 1362. The four supporting surfaces 1362 are sequentially and spaced apart in the circumferential direction of the elastic element 132, and are respectively directly opposite to one end portion of the moving spring piece 1311 outside the upper armature 143. By providing a uniform supporting effect on the two end portions of the moving spring piece 1311, it is beneficial to improve the structural reliability of the moving component 13.

[0062] Of course, in some other embodiments not shown in the figures, when the support structure 136 is disposed around the elastic element 132, the support structure 136 may 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 support surface 1362 with an annular surface realizes multi-directional contact with the moving spring mechanism 131, which can further improve the structural reliability of the moving assembly 13.

[0063] In the present application, the support structure 136 can be integrally formed with the pushing seat 1331 and the pushing rod 1332. The pushing mechanism 133 as a whole can be prepared from a plastic material, with a simple preparation process and being beneficial to reducing the preparation cost.

[0064] Please refer to Figure 8 and Figure 9 , in some embodiments, the moving spring piece 1311 may include two sub-spring pieces 1312 arranged in parallel and spaced from each other. When the moving spring mechanism 131 is provided with the lower armature 1314, the lower armature 1314 can be connected to the two sub-spring pieces 1312 simultaneously. The lower armature 1314 may also include two spaced sub-armatures, and the two sub-armatures are connected to the two sub-spring pieces 1312 in a one-to-one correspondence. Each moving contact 1313 of the moving spring piece 1311 can be jointly formed by the corresponding positions of the two sub-spring pieces 1312. With such a setting, the two sub-spring pieces 1312 can provide more stable electrical contact, reduce the poor contact caused by the wear or damage of a single spring piece, can also share the mechanical load of the moving contact 1313, reduce the stress of a single spring piece, 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-spring pieces 1312 fails, the other sub-spring piece 1312 can still realize the on-off control of the circuit with the static contact 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 in other positions, the moving spring piece 1311 can be an integral body or provided with two sub-spring pieces 1312, as long as it does not affect the support function of the support surface 1362 on the moving spring mechanism 131, which will not be elaborated here.

[0065] 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 setting and orientation setting between the elastic element 132 and the moving spring mechanism 131 and the pushing mechanism 133 are also not limited, as long as the elastic cooperation between the moving spring mechanism 131 and the pushing mechanism 133 can be realized to buffer the moving spring mechanism 131 during the switching process from the second state to the third state.

[0066] 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-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as within the scope described in this specification.

[0067] The above-described embodiments only express several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent 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 belong to 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: Insulation cover; A stationary contactor is provided with a stationary contact point, the stationary contactor is fixed relative to the insulating cover, and a side of the stationary contactor facing away from the stationary contact point protrudes out of the outside of the insulating cover; as well as, A dynamic assembly, comprising a pushing mechanism, a dynamic spring mechanism, an elastic element and a bracket, wherein the pushing mechanism comprises a pushing seat, a pushing rod connected to the pushing seat and a supporting structure, the dynamic spring mechanism is arranged on a side of the supporting structure facing away from the pushing seat, and is provided with a dynamic contact opposite to the static contact, the dynamic spring mechanism is elastically matched with the pushing mechanism through the elastic element, and the bracket is connected to the pushing seat and slidably matched with the dynamic spring mechanism; The support structure has a support surface spaced apart from the dynamic spring mechanism, and the support surface is used to support the dynamic spring mechanism on a path where the dynamic spring mechanism moves away from the static contact when a short circuit current occurs and causes the dynamic contact and the static contact to bounce apart.

2. The high voltage DC relay according to claim 1, characterized in that: The supporting structure is arranged around the elastic element, and a side of the supporting structure facing the dynamic spring mechanism forms the supporting surface.

3. The high voltage DC relay according to claim 2, characterized in that: The supporting surface is arranged around the elastic element.

4. The high voltage DC relay according to claim 2, characterized in that: The support structure is provided with a plurality of grooves arranged toward the dynamic spring mechanism, the plurality of grooves are arranged in sequence and at intervals along the circumference of the elastic element, and the side walls of two adjacent grooves are connected through the support surface.

5. The high voltage DC relay according to claim 1, characterized in that: The pushing seat, the pushing rod and the supporting structure are integrally formed.

6. 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.

7. The high voltage DC relay according to claim 6, 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.

8. The high voltage DC relay according to claim 6, characterized in that: The moving contact can bounce relative to the static contact under the action of electric repulsion 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.

9. The high voltage DC relay according to claim 6, characterized in that: The movable spring mechanism comprises a relatively fixed lower armature and a movable spring piece, the movable contact is arranged on a side of the movable spring piece facing the static contact, wherein the supporting surface is opposite to the lower armature, and / or the supporting surface is opposite to the movable spring piece.

10. The high voltage DC relay according to claim 9, 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 upper armature is arranged on the bracket, or the upper armature is arranged outside the moving component and fixed relative to the static contact.

11. The high voltage DC relay according to claim 10, 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.

12. The high voltage DC relay according to any one of claims 1 to 11, characterized in that: The high-voltage DC relay also includes a base and an electromagnetic assembly, the electromagnetic assembly and the static contact are arranged on the base, the pushing mechanism includes a pushing seat connected to the bracket 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.

13. The high voltage DC relay according to claim 12, 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.

14. The high voltage DC relay according to claim 12, 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.

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