High-voltage direct current relay

Abstract

The present application relates to a high-voltage direct current relay (10), comprising a static contact (14) and a moving assembly (13), wherein the static contact (14) is provided with a static contact point (141), the moving assembly (13) comprises a pushing mechanism (133), a moving spring mechanism (131) and an elastic element (132), the moving spring mechanism (131) is provided with a moving contact point (1313) opposite the static contact point (14), and the moving spring mechanism (131) elastically cooperates with the pushing mechanism (133) by means of the elastic element (132). The moving assembly (13) is formed with a support surface (1362), the support surface (1362) is spaced apart from the moving spring mechanism (131), and the support surface (1362) is used for supporting the moving spring mechanism (131) on a path along which the moving spring mechanism (131) moves away from the static contact (14) when a short circuit current causes the moving contact point (1313) and the static contact point (141) to spring open.

Description

High-voltage direct-current relay

[0001] Related applications

[0002] The present application claims priority to the Chinese patent application No. 2024108316275, filed on June 25, 2024, entitled “High-voltage direct-current relay”, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of relays, and in particular to a high-voltage direct-current relay. BACKGROUND

[0004] As a new type of electric automatic switch, the high-voltage direct-current relay can realize the normally open state or the normally closed state through the electromagnetic holding force. The current high-voltage direct-current relay generally includes an electromagnetic assembly, a moving assembly, and a static contact, the moving contact provided on the moving spring of the moving assembly and the static contact provided on the static contact together serve as the contact part of the high-voltage direct-current relay, the electromagnetic assembly includes a coil, a first core, and a second core, when the coil is energized, the second core can be magnetized, so that the second core and the first core attract each other, thereby driving the moving assembly to approach the static contact, until the moving contact on the moving assembly and the static contact on the static contact are in contact, realizing the conduction of the circuit. However, the current high-voltage direct-current relay, when the circuit is short-circuited or overloaded, the moving contact and the static contact will be repelled due to the electrodynamic repulsion, and an arc phenomenon will occur between the moving contact and the static contact, resulting in damage to the relay. The miniaturization and short-circuit resistance of the high-voltage direct-current relay are increasingly demanded in the new energy industry and other industries using high-voltage circuits. SUMMARY

[0005] According to various embodiments of the present application, a high-voltage direct-current relay is provided.

[0006] A high-voltage direct-current relay includes:

[0007] a static contact provided with a static contact;

[0008] a moving assembly including a pushing mechanism, a moving spring mechanism, and an elastic element, the moving spring mechanism being provided with a moving contact opposite to the static contact, the moving spring mechanism being elastically matched with the pushing mechanism through the elastic element;

[0009] the moving assembly is formed with a support surface, the support surface being arranged in a spaced manner with the moving spring mechanism, the support surface being used to support the moving spring mechanism on the path of moving away from the static contact when the short-circuit current occurs to cause the moving contact and the static contact to be repelled.

[0010] The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the application will be apparent from the description and drawings, and from the claims. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the disclosed drawings without any creative effort.

[0012] Fig. 1 is a structural schematic diagram of a high-voltage DC relay in an initial state in some embodiments, in which a support surface is arranged on a support frame.

[0013] Fig. 2 is a structural schematic diagram of a moving assembly in the high-voltage DC relay shown in Fig. 1.

[0014] Fig. 3 is an exploded schematic diagram of the moving assembly in some embodiments, in which the support frame includes a support structure.

[0015] Fig. 4 is a structural schematic diagram of the high-voltage DC relay shown in Fig. 1 in a first state.

[0016] Fig. 5 is a structural schematic diagram of the high-voltage DC relay shown in Fig. 1 in a second state.

[0017] Fig. 6 is a structural schematic diagram of the high-voltage DC relay shown in Fig. 1 in a third state.

[0018] Fig. 7 is a structural schematic diagram of a moving assembly in some embodiments, in which a lower armature is not arranged.

[0019] Fig. 8 is a structural schematic diagram of the moving assembly shown in Fig. 7 from another angle.

[0020] Fig. 9 is a structural schematic diagram of a moving assembly in some embodiments, in which a support structure is connected to a support arm main body.

[0021] Fig. 10 is a structural schematic diagram of the moving assembly shown in Fig. 9 from another angle.

[0022] Fig. 11 is a structural schematic diagram of a moving assembly in some embodiments, in which a support structure is connected to both sides of a support arm main body.

[0023] Fig. 12 is a structural schematic diagram of the moving assembly shown in Fig. 11 from another angle.

[0024] Fig. 13 is a structural schematic diagram of a moving assembly in some embodiments, in which a support structure is connected to both sides of a support arm main body.

[0025] Fig. 14 is a structural schematic diagram of the moving assembly shown in Fig. 13 from another angle.

[0026] Fig. 15 is a schematic diagram of a high-voltage DC relay including a support structure in an initial state, according to some embodiments.

[0027] Fig. 16 is a schematic diagram of a moving assembly in the high-voltage DC relay shown in Fig. 15.

[0028] Fig. 17 is an exploded schematic diagram of the moving assembly shown in Fig. 16.

[0029] Fig. 18 is a schematic diagram of a moving assembly including a support surface on a connecting portion, according to some embodiments.

[0030] Fig. 19 is an exploded schematic diagram of the moving assembly shown in Fig. 18.

[0031] Fig. 20 is a schematic diagram of the moving assembly shown in Fig. 18 from another angle.

[0032] Fig. 21 is a schematic diagram of a high-voltage DC relay including a support structure in an initial state, according to other embodiments.

[0033] Fig. 22 is a schematic diagram of a moving assembly in the high-voltage DC relay shown in Fig. 21.

[0034] Fig. 23 is a schematic diagram of the moving assembly shown in Fig. 22 from another angle.

[0035] Fig. 24 is an exploded schematic diagram of the moving assembly shown in Fig. 23.

[0036] Fig. 25 is a schematic diagram of a high-voltage DC relay including a support surface on a sliding slot in an initial state, according to some embodiments.

[0037] Fig. 26 is a schematic diagram of a moving assembly in the high-voltage DC relay shown in Fig. 25.

[0038] Fig. 27 is a schematic diagram of the moving assembly shown in Fig. 26 from another angle.

[0039] Fig. 28 is an exploded schematic diagram of the moving assembly shown in Fig. 27.

[0040] Fig. 29 is a schematic diagram of some components of the high-voltage DC relay shown in Fig. 25.

[0041] Fig. 30 is a schematic diagram of a moving assembly including two sub-spring pieces, according to some embodiments.

[0042] Fig. 31 is a schematic diagram of the moving assembly shown in Fig. 30 from another angle.

[0043] Fig. 32 is a schematic diagram of a support structure including a spring piece sleeve, according to some embodiments.

[0044] Fig. 33 is an exploded schematic diagram of the moving assembly shown in Fig. 32.

[0045] FIG. 34 is a schematic view of a second portion of the first body being angled with respect to the support structure, according to some embodiments.

[0046] FIG. 35 is a schematic view of the moving assembly shown in FIG. 34.

[0047] FIG. 36 is a schematic view of the support structure being connected to the edge of the connector body, according to some embodiments.

[0048] FIG. 37 is an exploded view of the moving assembly shown in FIG. 36. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0050] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0051] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0052] In the present application, unless specifically defined otherwise, if there are any terms "mount", "connect", "connect", "fix", and the like, these terms should be interpreted in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0053] In the present application, unless otherwise explicitly specified and limited, if there are similar descriptions of the first feature "on" or "below" the second feature, it can mean 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 "on", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or only indicates that the first feature is less than the second feature in horizontal height.

[0054] It should be noted that if an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not represent the only implementation.

[0055] With the increasingly wide application of high-voltage DC relays in various devices, the industry has increasingly high requirements for the heat loss resistance, short-circuit resistance, and voltage of high-voltage DC relays. Among them, the current and voltage of the circuit to which the high-voltage DC relay is applied are increasingly high. For example, in new energy vehicles and other devices, as the endurance mileage requirement of new energy vehicles increases, the capacity of the battery pack of the new energy vehicle also increases, and the current and voltage of the high-voltage DC relay applied to the battery pack circuit also increase. As a result, when the circuit is short-circuited or overloaded, the electrodynamic repulsion generated by the moving contact and the stationary contact of the high-voltage DC relay is large, which easily causes the moving contact and the stationary contact to be repelled apart by a large distance. For example, the elastic element is squeezed to an extreme compression state by the moving spring mechanism, and then the impact force is transmitted to the push seat and the electromagnetic assembly. At this time, the impact force is too large, which easily causes the electromagnetic assembly, the moving assembly, and the stationary contact to be separated as a whole, resulting in damage to the high-voltage DC relay, or the distance between the moving contact and the stationary contact is too far, resulting in too much heat generated by the arc phenomenon between the moving contact and the stationary contact, which burns the high-voltage DC relay, or even causes the high-voltage DC relay to explode. However, in order to improve the holding force of the electromagnetic assembly on the moving assembly to avoid the electromagnetic assembly from being separated from the stationary contact due to insufficient holding force or to reduce the repelling distance of the moving contact and the stationary contact, the traditional high-voltage DC relay usually needs to increase the number of turns of the coil, which increases the cost and volume of the electromagnetic assembly, and increases the volume and cost of the high-voltage DC relay.

[0056] Based on the above problems, the present application provides a high-voltage DC relay.

[0057] Please refer to Fig. 1, Fig. 2 and Fig. 3, Fig. 1 is a schematic diagram of the structure of the high-voltage DC relay 10 in some embodiments, Fig. 2 is a schematic diagram of the structure of the moving assembly 13 in some embodiments, and Fig. 3 is an exploded schematic diagram of the moving assembly 13 in some other embodiments. In some embodiments, the high-voltage DC relay 10 comprises a base 11, an electromagnetic assembly 12, a moving assembly 13, a static contact 14 and an insulating cover 142, the insulating cover 142 is arranged on the base 11, the static contact 14 is arranged on the insulating cover 142, and the static contact 14 can be provided with two, and the two static contacts 14 are both provided with static contact points 141. The moving assembly 13 comprises 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 with the pushing mechanism 133 through the elastic element 132. The electromagnetic assembly 12 is arranged on the base 11 and can drive the moving assembly 13 as a whole to move towards or away from the static contact points 141 through the pushing mechanism 133, so as to make the moving contact points 1313 contact with the static contact points 141 or make the moving contact points 1313 separate from the static contact points 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 can be provided with an outgoing end electrically connected to the two static contact points 141, and the outgoing end is electrically connected with the circuit. When the moving contact points 1313 and the static contact points 141 are in contact, the moving contact points 1313 conduct the two static contact points 141 to make the circuit conduct, at this time the high-voltage DC relay 10 is opened, and when the moving contact points 1313 separate from the static contact points 141, the two static contact points 141 are electrically isolated, the circuit is disconnected, and at this time the high-voltage DC relay 10 is closed. In some embodiments, the high-voltage DC relay 10 can further comprise a shell (not shown in the figure) arranged on the insulating cover 142 and the static contact 14, and the static contact 14 is led out from the shell through a conductive structure such as an electrode and a wire to be electrically connected with the circuit, the material of the shell comprises but is not limited to an insulating material such as plastic, and the shell can isolate the static contact 14, the insulating cover 142 and the moving assembly 13 from the outside to achieve the insulation protection effect.

[0058] The high-voltage DC relay 10 provided in the application is beneficial to reduce the preparation cost and compress the volume, and can effectively support the moving spring mechanism 131, reduce the distance between the moving contact points 1313 and the static contact points 141 to reduce the heat generated by the arc phenomenon, and avoid the damage of the high-voltage DC relay 10 caused by the separation of the moving assembly 13 and the electromagnetic assembly 12 from the static contact 14. The high-voltage DC relay 10 provided in the application can be used in a circuit with high current, for example, in a circuit with a working current of 8kA or less, and the high-voltage DC relay 10 comprises but is not limited to a battery pack circuit for a new energy vehicle, and the high-voltage DC relay 10 can also be used in a circuit of any other applicable device as a switching element, which will not be described in detail in the application.

[0059] In some embodiments, the pushing mechanism 133 comprises a pushing base 1331 and a pushing rod 1332 connected to the pushing base 1331 on the side opposite to the moving spring mechanism 131, and the electromagnetic assembly 12 can comprise an upper iron core 121, a lower iron core 122, and a coil arranged around the upper iron core 121 and the lower iron core 122, wherein the upper iron core 121 is fixedly arranged on the base 11, and the lower iron core 122 and the coil (not shown in the figure) can be arranged in the base 11. The pushing rod 1332 penetrates the upper iron core 121 and is inserted into the lower iron core 122, and the pushing rod 1332 is in sliding fit 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 are attracted to each other and the lower iron core 122 moves towards the upper iron core 121, thereby driving the pushing rod 1332 to move the moving assembly 13 as a whole towards the static contact 141.

[0060] In some embodiments, the moving assembly 13 further comprises a bracket 135 connected to the pushing base 1331 and in sliding fit with the moving spring mechanism 131. For example, the bracket 135 can comprise two first arms 1351 and a second arm 1357, the two first arms 1351 are respectively located on the two sides opposite to the elastic element 132 and the moving spring mechanism 131, and are directly or indirectly connected to the pushing base 1331. The two ends of the second arm 1357 are respectively connected to the two first arms 1351 and are located on the side of the moving assembly 13 opposite to the pushing base 1331. The two first arms 1351 are in sliding fit with the moving spring mechanism 131 on the two sides opposite to the moving spring mechanism 131, so that the moving spring mechanism 131 moves relative to the pushing base 1331 in the direction of approaching or moving away from the static contact 141, thereby causing the elastic element 132 to elastically deform. The sliding limiting of the two first arms 1351 to the moving spring mechanism 131 can provide a guiding effect for the movement of the moving spring mechanism 131 relative to the pushing base 1331, thereby improving the performance stability of the high-voltage DC relay 10, and the second arm 1357 can limit the limit position of the moving spring mechanism 131 away from the pushing base 1331 on the side of the moving spring mechanism 131 towards the static contact 141, thereby preventing the moving spring mechanism 131 from being separated from the pushing base 1331 and improving the performance stability of the high-voltage DC relay 10.

[0061] Further, in some embodiments, the moving assembly 13 is formed with a support surface 1362, which is located between and spaced apart from the moving spring mechanism 131 and the pushing seat 1331, and is capable of supporting the moving spring mechanism 131 in the path of movement of the moving spring mechanism 131 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 of the pushing seat 1331. In the present application, the state in which the moving contact 1313 and the static contact 141 are spaced apart and the electromagnetic assembly 12 does not exert force on the pushing rod 1332, i.e. the state in which the high-voltage DC relay 10 breaks the circuit, is referred to as the initial state, and in the initial state, the support surface 1362 is spaced apart from the moving spring mechanism 131. When it is required to contact the moving contact 1313 and the static contact 141 to conduct the circuit, the lower core 122 of the electromagnetic assembly 12 moves in the direction of approaching the upper core 121, and the pushing mechanism 133 driven by the pushing rod 1332, and in turn the moving spring mechanism 131, moves in the direction of approaching the static contact 141, so that the moving assembly 13 has a first state and a second state. In combination with FIGS. 4 and 5, when the moving assembly 13 moves to the first state, the moving contact 1313 is just in contact with the static contact 141, and the high-voltage DC relay 10 conducts the circuit, and in the first state, the length of the elastic element 132 is the same as that in the initial state. That is, in the process of driving the moving spring mechanism 131 by the pushing mechanism 133 to move in the direction of approaching 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.

[0062] After the electromagnetic assembly 12 drives the moving spring mechanism 131 to move to the first state through the pushing mechanism 133, the electromagnetic assembly 12 continues to drive the pushing mechanism 133 to move towards the static contact 141 to the second state. During the switching from the first state to the second state, the moving contact 1313 is relatively fixed with the static contact 141 due to the contact between the moving contact 1313 and the static contact 141, and the pushing mechanism 133 continues to move towards the static contact 141, which causes the distance between the pushing seat 1331 and the moving spring mechanism 131 to decrease. That is, during the switching from the first state to the second state, the moving spring mechanism 131 and the pushing seat 1331 are relatively close, and the moving spring mechanism 131 and the pushing seat 1331 will extrude the elastic element 132, so that the length of the elastic element 132 decreases and the elastic element 132 elastically deforms. 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 in the second state is greater than that in the first state. The second state is configured to enable the elastic element 132 to abut the moving contact 1313 against the static contact 141, thereby improving the stability and reliability of the contact between the moving contact 1313 and the static contact 141, and the elastic element 132 can cooperate with the electromagnetic assembly 12 to offset the electrodynamic repulsive force between the moving contact 1313 and the static contact 141, which is beneficial to reduce the holding force requirement of the high-voltage direct-current relay 10 on the electromagnetic assembly 12, and is beneficial to reduce the cost and volume of the electromagnetic assembly 12.

[0063] It can be understood that during the switching from the initial state to the first state and during the switching from the first state to the second state, the lower core 122 gradually approaches the upper core 121, and in the first state, the lower core 122 is spaced apart from the upper core 121, and in the second state, the lower core 122 can be in contact with the upper core 121, which is beneficial to improve the magnetic attraction force between the upper core 121 and the lower core 122, thereby improving the holding force of the electromagnetic assembly 12 on the moving assembly 13.

[0064] In some embodiments, the position of the support surface 1362 between the push seat 1331 and the moving spring mechanism 131 is designed such that in the second state, the support surface 1362 is still spaced apart from the moving spring mechanism 131, and the distance between the moving spring mechanism 131 and the support surface 1362 in the second state is smaller than in the first state. Moreover, the distance between the support surface 1362 and the push seat 1331 is greater than the limit compression length of the elastic element 132, that is, in the second state, the difference between the length of the elastic element 132 and the limit compression length of the elastic element 132 is greater than the distance between the moving spring mechanism 131 and the support surface 1362, and the length of the elastic element 132 can be equal to the distance between the moving spring mechanism 131 and the push seat 1331. In combination with FIG. 6, it can be understood that when the circuit is short-circuited or overloaded, for example, the current exceeds 8kA, the electrodynamic 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 are repelled, the moving assembly 13 moves towards the push seat 1331, and further extrudes the elastic element 132, until the moving assembly 13 abuts against the support surface 1362, the support surface 1362 provides a supporting action on the moving assembly 13, so that the moving assembly 13 cannot move towards the push seat 1331 any more. In this application, the state in which the support surface 1362 abuts against the moving assembly 13 to provide a supporting action on the moving assembly 13 is referred to as the third state of the moving assembly 13, and in the third state, the moving spring mechanism 131, the bracket 135 and the push mechanism 133 are relatively fixed, and the electromagnetic assembly 12 bears the impact force of the moving spring mechanism 131.

[0065] It can be understood that the support surface 1362 of the moving assembly 13 only contacts the moving spring mechanism 131 to achieve a supporting action in the third state, and in other states, the support surface 1362 does not interfere with the movement of the moving spring mechanism 131, which is beneficial to avoid the setting of the support surface 1362 to increase the risk of the moving spring mechanism 131 being stuck, uneven force or wear and tear, etc. due to other types of interference such as sliding fit, limiting fit, etc. while achieving the supporting action, which is also beneficial to maintain the structural reliability of the moving assembly 13 and has less impact on the contact reliability of the moving assembly 13.

[0066] The moving assembly 13 of the high-voltage DC relay 10 is formed with a support surface 1362 capable of supporting the moving spring mechanism 131 on the path of the moving spring mechanism 131 moving towards the push 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 contactor 14 are repelled by the electrodynamic repulsion force, and the moving spring mechanism 131 can first compress the elastic element 132 until the support surface 1362 supports the moving spring mechanism 131 to make the moving spring mechanism 131 relatively fixed with the push mechanism 133. After the moving contact 1313 and the static contact 141 are repelled, the electrodynamic repulsion force between the moving contact 1313 and the static contact 141 disappears. During the movement of the moving spring mechanism 131 towards 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 limit compression length. When the support surface 1362 supports the moving spring mechanism 131, the impact of the moving spring mechanism 131 on the push mechanism 133 and the electromagnetic assembly 12 will not be too large, avoiding the impact being too large to cause the moving assembly 13 and the electromagnetic assembly 12 to be separated from the static contactor 14, thereby damaging the high-voltage DC relay 10. Moreover, the support of the support surface 1362 to the moving spring mechanism 131 makes the moving spring mechanism 131 unable to continue to move away from the static contact 141, and the distance between the moving spring mechanism 131 and the push seat 1331 is still greater than the limit compression length of the elastic element 132, which is beneficial to reduce the distance between the moving contact 1313 and the static contact 141 after repelling, and the design of the elastic element 132 buffering can avoid the moving assembly 13 from being separated from the static contactor 14, so that the distance between the moving contact 1313 and the static contact 141 will not be too far, thereby avoiding the generation of excessive heat due to the arc phenomenon between the moving contact 1313 and the static contact 141, and thus avoiding the damage or even explosion of the high-voltage DC relay 10. Moreover, the buffering of the elastic element 132 to the moving spring mechanism 131 can also reduce the requirement for the holding force of the moving assembly 13 to the electromagnetic assembly 12, so that the core of the electromagnetic assembly 12 can support the entire moving assembly 13 with a smaller holding force, thereby reducing the number of turns of the coil of the electromagnetic assembly 12 and / or the volume of the core, and thus facilitating the miniaturization design of the high-voltage DC relay 10.

[0067] Therefore, in the process of switching from the second state to the third state, the high-voltage DC relay 10 buffers the impact of the moving spring mechanism 131 through the elastic element 132 first, and then bears the impact of the moving spring mechanism 131 through the electromagnetic assembly 12, which is beneficial to reduce the requirement for the holding force of the electromagnetic assembly 12, reduce the cost and volume of the electromagnetic assembly 12, and also reduce the repelling 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 balance the small volume, low cost, and high short-circuit current and voltage resistance.

[0068] In some embodiments, the elastic element 132 is arranged between the push seat 1331 and the moving spring mechanism 131, and the two ends of the elastic element 132 abut against the moving spring mechanism 131 and the push seat 1331 respectively. The two ends of the elastic element 132 can be connected to the moving spring mechanism 131 and the push seat 1331 respectively. In this way, the space layout among the moving spring mechanism 131, the elastic element 132 and the push mechanism 133 can be reasonably planned, so that the structure is more compact, which is conducive to improving the space utilization efficiency of the moving assembly 13, and at the same time, the elastic element 132 is relatively far away from the contact position of the moving contact 1313 and the static contact 141, which reduces the influence of high temperature and ablation splashes on the elastic element 132, and reduces the assembly difficulty of the elastic element 132 and other components. It can be understood that when the supporting surface 1362 is located between the moving spring mechanism 131 and the push seat 1331, the supporting surface 1362 is farther away from the contact position of the moving contact 1313 and the static contact 141, which is also conducive to reducing the influence of high temperature and ablation splashes on the supporting surface 1362, for example, avoiding the influence of the second state to the third state caused by the decrease of the distance between the supporting surface 1362 and the moving spring mechanism 131 due to splashes.

[0069] In some embodiments, please refer to FIG. 5 and FIG. 6, in some embodiments, the moving spring mechanism 131 includes a moving spring sheet 1311 and a lower armature 1314 fixedly connected with the moving spring sheet 1311, the high-voltage direct-current relay 10 further includes an upper armature 143 opposite to the lower armature 1314, the moving contact 1313 is arranged on the side of the moving spring sheet 1311 facing the static contact 14, the upper armature 143 and the lower armature 1314 jointly constitute an anti-short circuit ring structure, and the upper armature 143 is located on the side of the lower armature 1314 away from the push seat 1331. The upper armature 143 can be fixed on the bracket 135 and located on the side of the moving spring sheet 1311 away from the push seat 1331, or the upper armature 143 can be arranged on the static contact 14, for example, the high-voltage direct-current relay 10 includes an insulating cover 142, the static contact 14 and the upper armature 143, the insulating cover 142 covers the moving assembly 13 and is arranged on the base 11, the static contact 14 and the upper armature 143 are both fixedly arranged on the insulating cover 142, and the static contact 14 protrudes out of the outside of the insulating cover 142 on the side away from the moving spring mechanism 131, i.e. the side 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, which is conducive to reducing the holding force required by the electromagnetic assembly 12, and also conducive to reducing the cost and volume of the electromagnetic assembly 12.

[0070] When the short circuit ring structure is provided in the high-voltage DC relay 10, the support surface 1362 can be directly opposite one of the lower armature 1314 or the moving reed 1311, as long as it can abut one of the upper armature 143 and the moving reed 1311 on the path of the moving reed mechanism 131 moving towards the push seat 1331, so as to provide a support effect for the moving reed mechanism 131. Of course, the moving assembly 13 can also be provided with a plurality of support surfaces 1362, which are directly opposite the moving reed 1311 and the upper armature 143 respectively, and the support surfaces 1362 can simultaneously abut the moving reed 1311 and the upper armature 143, so as to achieve a more stable and reliable support effect for the moving assembly 13. In some embodiments, the moving assembly 13 is formed with at least two support surfaces 1362 located on opposite sides of the elastic element 132, which can be directly opposite one of the moving reed 1311 and the upper armature 143, or directly opposite the moving reed 1311 and the upper armature 143 respectively. The provision of at least two opposite support surfaces 1362 in multiple positions to simultaneously provide a uniformly distributed support effect for the moving reed mechanism 131, in combination with the guiding effect of the bracket 135 for the moving reed mechanism 131, can improve the stability and reliability of the movement of the moving reed mechanism 131 relative to the push seat 1331, and avoid the deflection of the moving reed mechanism 131. Of course, the short circuit ring structure can also be omitted, and some embodiments in which the short circuit ring structure is omitted are shown in the structure diagrams of the moving assembly 13 in FIGS. 7 and 8. The two sides of the moving reed 1311 can abut the second branch arm 1357 and the elastic element 132 respectively.

[0071] It can be understood that when the upper armature 143 is arranged on the bracket 135, for example, on the second branch arm 1357 and between the second branch arm 1357 and the moving reed 1311, if the upper armature 143 and the lower armature 1314 are in contact in the first state, in the second state, the moving reed 1311 and the lower armature 1314 as a whole move a certain distance towards the push seat 1331 relative to the first state, and the upper armature 143 and the lower armature 1314 are spaced apart. When the upper armature 143 is arranged on the insulating cover 142, if the lower armature 1314 is in contact with the upper armature 143 in the first state, in the second state, the upper armature 143 and the lower armature 1314 are also spaced apart. In other embodiments, the high-voltage DC relay 10 can also install the upper armature 143 through a carrier structure arranged on the base 11, so as to fix the upper armature 143 between the insulating cover 142 and the lower armature 1314, as long as the upper armature 143 and the lower armature 1314 can attract each other in the first state and the second state to provide a holding force for the contact between the moving contact 1313 and the static contact 141.

[0072] In the present application, the first supporting arm 1351 is in sliding fit with the moving spring mechanism 131. The two opposite surfaces of the lower armature 1314 can be in sliding fit with the two opposite surfaces of the first supporting arm 1351. The two opposite surfaces of the moving spring sheet 1311 can be in sliding fit with the two first supporting arms 1351. The moving spring sheet 1311 or the lower armature 1314 can be partially inserted into the first supporting arm 1351 and in sliding fit with the first supporting arm 1351. As long as the first supporting arm 1351 can provide guiding and limiting effects on the movement of the moving spring mechanism 131 relative to the pushing base 1331, the first supporting arm 1351 can be in sliding fit with the moving spring mechanism 131 in any way.

[0073] In some embodiments, the bracket 135 can be directly connected to the pushing base 1331. The moving assembly 13 can further include a fixing sheet 134 connected to the bracket 135 and the pushing base 1331. The bracket 135 is indirectly connected to the pushing base 1331 through the fixing sheet 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 the supporting surface 1362 can provide supporting effect on the moving assembly 13 in the movement path of the moving assembly 13 towards the pushing base 1331, the supporting surface 1362 can be formed on the bracket 135, or on the fixing sheet 134, or on the pushing mechanism 133. The forming ways of the supporting surface 1362 on different positions and elements are illustrated by the following embodiments. The arrangement of the supporting surface 1362 is not limited to the description in the present application. The forming ways of the following embodiments can be combined with each other. That is, the moving assembly 13 can be formed with multiple supporting surfaces 1362. The multiple supporting surfaces 1362 can be formed on different elements and / or different positions.

[0074] In combination with FIGS. 1, 2, 9 and 10, in some embodiments, when the bracket 135 is provided with two first supporting arms 1351 connected to the pushing base 1331, the supporting surface 1362 is formed on at least one first supporting arm 1351. In FIGS. 1, 2, 9 and 10, the supporting surface 1362 is formed on both first supporting arms 1351.

[0075] Further, referring to FIG. 1 and FIG. 2, in some embodiments, the first arm 1351 comprises 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 in sliding fit with the dynamic 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 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 dynamic spring sheet 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, and the first body 1352, the support structure 136 and the second body 1353 collectively form a stepped structure. The side of the support structure 136 facing the dynamic spring mechanism 131 forms a support surface 1362, in other words, the support surface 1362 corresponds to the step surface of the stepped structure.

[0076] Referring to FIG. 9 and FIG. 10, in other embodiments, the first arm 1351 comprises 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 part of the support structure 136 is located on the side of the arm body 1354 facing the dynamic spring mechanism 131 and between the dynamic spring mechanism 131 and the pushing seat 1331, and the side of the support structure 136 facing the dynamic spring mechanism 131 forms a support surface 1362.

[0077] In the present embodiment, the connection mode of 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, the support structure 136 is connected to the arm body 1354 in the through hole 1355, and the support structure 136 can be bent from the part of the first arm 1351 forming the through hole 1355 relative to the side of the arm body 1354 facing the elastic element 132, which is conducive 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 of which is close to the dynamic spring mechanism 131 and the other of which is away from the dynamic spring mechanism 131, referring to FIG. 9 and FIG. 10, the support structure 136 can be connected to the side wall of the through hole 1355 close to the dynamic spring mechanism 131, and in some embodiments, the support structure 136 can also be connected to the side wall of the through hole 1355 away from the dynamic spring mechanism 131.

[0078] In the embodiment, when the high-voltage direct-current relay 10 is provided with the short-circuit ring structure, the lower armature 1314 can be connected to the middle part of the moving reed 1311, the two end parts of the moving reed 1311 outside the lower armature 1314 form the moving contact 1313, and the support structure 136 can be opposite to the lower armature 1314, which is conducive to adapting the position of the lower armature 1314 and the first supporting arm 1351, and reduces the manufacturing difficulty of the support structure 136.

[0079] 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 supporting arm 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 conducive to reducing the distance between the moving contact 1313 and the static contact 141 in the third state, and reducing the heat generated by the arc phenomenon.

[0080] In combination with FIGS. 11-14, in some embodiments, the first supporting arm 1351 can be provided with two support structures 136, and the two support structures 136 are respectively connected to the opposite edges of the supporting arm body 1354. The support structure 136 can be formed by bending the part on both sides of the first supporting arm 1351 to the side of the supporting arm body 1354 where the elastic element 132 is located. Referring to FIGS. 11 and 12, in the embodiment, the support structure 136 can be substantially perpendicular to the supporting arm body 1354 and opposite to the two end parts of the moving reed 1311 outside the lower armature 1314. Referring to FIGS. 13 and 14, the support structure 136 can also be inclined to the supporting arm body 1354, and the end of the support structure 136 away from the supporting arm body 1354 extends into the space between the lower armature 1314 and the push seat 1331 and is opposite to the lower armature 1314.

[0081] It should be noted that when the support surface 1362 is formed on the support structure 136 of the first supporting arm 1351, the support structure 136 can be integrally formed with other parts of the first supporting arm 1351, and the first supporting arm 1351 as a whole can be made of any applicable metal material. In this way, the support structure 136 and the other parts of the first supporting arm 1351 have a certain elastic deformation capability, which can assist in buffering part of the impact force of the moving reed mechanism 131 when the moving reed mechanism 131 switches to the third state, and also helps to reduce the requirement for the holding force of the electromagnetic assembly 12.

[0082] Please refer to FIG. 15, FIG. 16 and FIG. 17, in some embodiments, the support surface 1362 can also be provided on the fixing sheet 134 connecting the push seat 1331 and the first supporting arm 1351, FIG. 15 shows the structural schematic diagram of the electromagnetic assembly 12 in the initial state when the support surface 1362 is provided on the fixing sheet 134, the relative relationship among the moving spring mechanism 131, the support surface 1362 and the push seat 1331 of the electromagnetic assembly 12 in other states can be referred to the above description and FIG. 1 and FIG. 4-FIG. 6, which will not be repeated here.

[0083] When the support surface 1362 is formed on the fixing sheet 134, in some embodiments, the fixing sheet 134 includes a sheet body (not labeled in the figure) and a support structure 136 and two connecting portions 1341 integrally connected to the sheet body, the sheet body is embedded in the push seat 1331, the sheet body can be completely located in the push seat 1331, only the side surface for connecting with the connecting portions 1341 and the support structure 136 is exposed, or part of the sheet body can protrude out of the push seat 1331 for connecting with the connecting portions 1341 and the support structure 136. The two connecting portions 1341 are respectively connected to the opposite edges of the sheet body and are both connected to the first supporting arm 1351, the support structure 136 can be bent relative to the sheet body to form the side of the push seat 1331 facing the moving spring mechanism 131, the side of the support structure 136 protruding out of the push seat 1331 faces the moving spring mechanism 131, and the end surface of the side of the support structure 136 facing the moving spring mechanism 131 forms the support surface 1362. By providing the support structure 136 on one part of the integral structure of the fixing sheet 134, the connection reliability of the support structure 136 and other elements in the moving assembly 13 can be improved.

[0084] In the embodiment, the support structure 136 can be provided only one, and the support structure 136 and the two connecting portions 1341 are located on three sides of the push seat 1331 respectively. In the embodiment shown in FIGS. 15-17, the fixing sheet 134 is provided with two support structures 136, and the two support structures 136 are integrally connected to the sheet-shaped body and located on two sides opposite to each other of the elastic element 132. The connecting line of the two support structures 136 is perpendicular to the projection of the connecting line of the two connecting portions 1341 on the sheet-shaped body, that is, when the push seat 1331 is substantially a square, the two support structures 136 and the two connecting portions 1341 can be located on four sides of the push seat 1331. In the embodiment, the two support structures 136 can be located opposite to the two end portions of the moving reed 1311 outside the lower armature 1314 respectively, which is beneficial to reasonably plan the layout of each part of the fixing sheet 134, the push seat 1331, the moving spring mechanism 131 and other elements, and improve the structural reliability and performance stability of the moving assembly 13. In the embodiment, the support structure 136 is separately provided on the fixing sheet 134 and integrally formed with the sheet-shaped body to form the support surface 1362, which is beneficial to reduce the deviation of the spring distance size caused by the riveting process, improve the matching precision between parts, and thus improve the performance reliability of the high-voltage DC relay 10.

[0085] Please refer to FIGS. 18, 19 and 20, when the support surface 1362 is formed on the fixing sheet 134, in other embodiments, the fixing sheet 134 includes at least two connecting portions 1341, the at least two connecting portions 1341 are located on two sides opposite to each other of the elastic element 132 and are connected to the push seat 1331 and the bracket 135, and the support surface 1362 is formed on at least one connecting portion 1341. In the embodiment, the connecting portion 1341 can be directly connected to the push seat 1331, or connected to the sheet-shaped body embedded in the push seat 1331, and the sheet-shaped body can be provided as described above.

[0086] In some embodiments, the connecting portion 1341 comprises a first connecting plate 1342 and a second connecting plate 1343 which 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 support 135 and forms a supporting surface 1362 towards one side of the moving assembly 13. For example, the first supporting arm 1351 of the support 135 is located outside the first connecting plate 1342, the first connecting plate 1342 and the first supporting arm 1351 are substantially parallel and both are perpendicular to the extending direction of the pushing seat 1331, and the second connecting plate 1343 is substantially perpendicular to the first connecting plate 1342 and the first supporting arm 1351, that is, the first connecting plate 1342, the second connecting plate 1343 and the first supporting arm 1351 form a stepped structure, and the supporting surface 1362 corresponds to the stepped surface of the stepped structure. In this embodiment, the supporting surface 1362 can be directly opposite to the lower armature 1314, which is conducive to adapting to the layout of the support 135, the pushing seat 1331 and the moving spring mechanism 131, and reduces the difficulty and cost of setting the supporting surface 1362. In this embodiment, the supporting surface 1362 is formed on the connecting portion 1341 by designing the shape of the connecting portion 1341, which is conducive to reducing the number of parts of the moving spring mechanism 131, simplifying the forming process and consumables of the parts, and at the same time, reducing the volume of the high-voltage DC relay 10. In addition, the connecting portion 1341 is led out from the pushing seat 1331, which can prolong the arc climbing distance of the connecting portion 1341 to the base 11, thereby improving the insulation performance of the pushing mechanism 133 and the safety performance of the high-voltage DC relay 10.

[0087] It can be understood that when the supporting surface 1362 is formed on the fixed sheet 134, the fixed sheet 134 as a whole can also be made of metal material, and the parts of the fixed sheet 134 can be integrally formed, so that the parts have a certain elastic deformation capability, thereby the elastic deformation capability between the parts of the fixed sheet 134 can buffer the impact of the moving spring mechanism 131 during the process of switching from the second state to the third state, which is conducive to reducing the requirement for the holding force of the electromagnetic assembly 12 and reducing the volume and cost of the electromagnetic assembly 12.

[0088] Please refer to FIG. 21, FIG. 22, FIG. 23 and FIG. 24, in some embodiments, the supporting surface 1362 can also be formed on the pushing mechanism 133, FIG. 21 shows a structure schematic view of the high-voltage DC relay 10 in the initial state when the supporting surface 1362 is formed on the pushing mechanism 133 in one of the embodiments, and the relative relationship among the moving spring mechanism 131, the supporting surface 1362 and the pushing seat 1331 when the high-voltage DC relay 10 is in other states can be referred to the above description, which will not be repeated here.

[0089] In the embodiment, the pushing mechanism 133 further comprises a support structure 136 arranged on the pushing seat 1331 and towards the moving spring mechanism 131. The support structure 136 comprises a support surface 1362 arranged towards the moving spring mechanism 131. The support structure 136 can be integrally formed with the pushing seat 1331 and the pushing rod 1332. The pushing mechanism 133 can be made of plastic material, which is simple in manufacturing process and low in manufacturing cost.

[0090] In the embodiment, the support structure 136 surrounds the elastic element 132 and comprises a plurality of grooves 1361 arranged towards the moving spring mechanism 131. The grooves 1361 are arranged in sequence and in a circumferential direction of the elastic element 132. The support structure 136 is located between two adjacent grooves 1361 and the part of the support structure 136 towards the moving spring mechanism 131 forms the support surface 1362. In other words, the side surfaces of the two adjacent grooves 1361 are connected by the support surface 1362. The plurality of grooves 1361 can avoid the structures such as the lower armature 1314, so that the support surface 1362 and the two ends of the moving spring sheet 1311 located outside the lower armature 1314 are opposite to each other, which is suitable for the layout of the elements of the moving assembly 13 and reduces the material consumption of the support structure 136 and the manufacturing cost of the moving assembly 13.

[0091] In some embodiments, the support structure 136 comprises four support surfaces 1362 arranged in sequence and in a circumferential direction of the elastic element 132. The two support surfaces 1362 are opposite to the two ends of the moving spring sheet 1311 located outside the upper armature 143. The uniform support provided by the two ends of the moving spring sheet 1311 improves the structural reliability of the moving assembly 13.

[0092] Of course, in another embodiment, when the support structure 136 surrounds the elastic element 132, the support structure 136 can also form a support surface 1362 surrounding the elastic element 132. The support surface 1362 is substantially annular. The support surface 1362 can abut against the lower armature 1314 to support the moving spring mechanism 131. The annular support surface 1362 can contact the moving spring mechanism 131 from multiple directions, which further improves the structural reliability of the moving assembly 13.

[0093] Please refer to FIG. 25, FIG. 26, FIG. 27 and FIG. 28. FIG. 25-FIG. 28 show another embodiment in which the support surface 1362 is formed on the bracket 135. FIG. 25 shows the structure of the high-voltage DC relay 10 in the initial state. The relative relationship among the moving spring mechanism 131, the support surface 1362 and the pushing seat 1331 in other states can be obtained by referring to the above description, which will not be repeated here.

[0094] In the embodiment, the moving spring mechanism 131 is formed with a sliding structure 1315, the first supporting arm 1351 of the support 135 is provided with a sliding groove 1356, at least part of the sliding structure 1315 is slidably arranged in the sliding groove 1356, the side wall of the sliding groove 1356 is located at 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 supports the moving spring mechanism 131 by abutting against the sliding structure 1315 on the path of the moving spring mechanism 131 moving close to the pushing seat 1331. The sliding groove 1356 that realizes the sliding cooperation between the sliding structure 1315 of the moving spring mechanism 131 and the first supporting arm 1351 forms the supporting surface 1362, which improves the reliability of the guiding and limiting effect of the support 135 on the moving spring mechanism 131, and improves the structural utilization efficiency of the moving assembly 13 and compresses the occupied space and the setting cost of the moving assembly 13.

[0095] In the embodiment, the two first supporting arms 1351 can be provided with the sliding grooves 1356, the moving spring mechanism 131 is provided with two sliding structures 1315, the two sliding structures 1315 protrude towards the two first supporting arms 1351 respectively and are slidably arranged in the corresponding sliding grooves 1356, and the two first supporting arms 1351 are respectively formed with the supporting surfaces 1362 located at the two sides opposite to the moving spring sheet 1311. The moving spring mechanism 131 is provided with the supporting and guiding effect at the two sides opposite to the moving spring sheet 1311, which can improve the stable reliability of the supporting and guiding. When the moving spring mechanism 131 is provided with the lower armature 1314, the sliding structure 1315 can protrude from one side or opposite sides of the upper armature 143 facing the first supporting arm 1351, or can protrude from one side or opposite sides of the moving spring sheet 1311 facing the first supporting arm 1351, and when the moving spring mechanism 131 is not provided with the lower armature 1314, the sliding structure 1315 can protrude from one side or opposite sides of the moving spring sheet 1311 facing the first supporting arm 1351. The sliding structure 1315 can be integrally formed with the moving spring sheet 1311 or the lower armature 1314.

[0096] Referring to FIG. 25 and FIG. 29, FIG. 29 shows a schematic diagram of the structure of the upper armature 143 when the support surface 1362 is formed in the sliding groove 1356 of the bracket 135, and the upper armature 143 is arranged on the static contact 14. When the upper armature 143 is arranged on the insulating cover 142, the upper armature 143 can be arranged corresponding to the static contact 141 and located between the insulating cover 142 and the moving spring 1311. In this way, the upper armature 143 can also limit the moving spring 131 on the side of the moving spring mechanism 131 away from the push base 1331, and define the limit position of the moving spring mechanism 131 away from the push base 1331. Thus, when the upper armature 143 is arranged on the insulating cover 142, the bracket 135 of the moving assembly 13 can omit the second supporting arm 1357, and only have two first supporting arms 1351 connected with the push base 1331 and located on the two sides of the moving spring mechanism 131. Of course, when the upper armature 143 is arranged on the insulating cover 142, the upper armature 143 and the moving spring 1311 can also be spaced by the second supporting arm 1357 of the bracket 135, and the second supporting arm 1357 defines the limit position of the moving spring mechanism 131 away from the push base 1331. In any of the above-mentioned embodiments of the different forming ways of the support surface 1362, the upper armature 143 can also be arranged on the bracket 135 or the insulating cover 142 of the static contact 14.

[0097] Referring to FIG. 30 and FIG. 31, FIG. 30 and FIG. 31 show one of the embodiments in which the support surface 1362 is formed on the push mechanism 133. In this embodiment, the moving spring 1311 can include two sub-springs 1312 arranged side by side 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-springs 1312 at the same time. The lower armature 1314 can also include two sub-armatures spaced from each other, and the two sub-armatures are connected to the two sub-springs 1312 one by one. Each moving contact 1313 of the moving spring 1311 can be formed by the corresponding positions of the two sub-springs 1312. In this way, the two sub-springs 1312 can provide more stable electrical contact, reduce the poor contact caused by the wear or damage of a single spring, and share the mechanical load of the moving contact 1313, reduce the stress of a single spring, improve the durability of the high-voltage DC relay 10, and provide more uniform current distribution, reduce the arc phenomenon and contact resistance, and improve the electrical contact performance. Moreover, when one of the sub-springs 1312 fails, the other sub-spring 1312 can still realize the on-off control of the loop with the static contact 141, and improve the performance reliability of the high-voltage DC relay 10. Of course, in any of the other embodiments in which the support surface 1362 is formed on other components or positions, the moving spring 1311 can be a whole or provided with two sub-springs 1312, as long as it does not affect the supporting effect of the support surface 1362 on the moving spring mechanism 131. Here, the details are not described again.

[0098] In the present application, the elastic element 132 includes but is not limited to any applicable elastic component such as a spring, a compression spring, etc., and the connection between the elastic element 132 and the moving spring mechanism 131 and the pushing mechanism 133 is not limited, as long as the elastic element 132 can realize the elastic cooperation between the moving spring mechanism 131 and the pushing mechanism 133 to buffer the moving spring mechanism 131 during the switching from the second state to the third state.

[0099] Of course, when the support surface 1362 is formed on the support 135, the support surface 1362 can also have other settings. The following are examples of the support surface 1362 formed on the support 135 in some embodiments. Please refer to FIGS. 32 and 33, in some embodiments, the support 135 can include 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 two ends of the connecting body 1358, and the support structure 136 is connected to one side of the connecting body 1358 facing the moving spring mechanism 131 and located between the two first arms 1351. The first arm 1351, the connecting body 1358, and the support structure 136 can be integrally formed. The side of the support structure 136 facing the moving spring mechanism 131, i.e., the side away from the connecting body 1358, forms the support surface 1362. The support structure 1362 can be substantially hollow cylindrical, and the support surface 1362 can be substantially annular. The support surface 1362 can be opposite to the lower armature 1314 to adapt to the spatial layout of the lower armature 1314 and the moving spring sheet 1311. In the present embodiment, one end of the elastic element 132 close to the connecting body 1358 can be sleeved on the support structure 1362, which is conducive to the assembly and positioning of the elastic element 132, and also conducive to ensuring that the length of the elastic element 132 is greater than the limit compression length when the support surface 1362 supports the moving spring mechanism 131.

[0100] Please refer to FIGS. 34 and 35, in some embodiments, when the first arm 1351 includes a first body 1352, a second body 1353, and a support structure 136, the part of the first body 1352 away from the support structure 136 is a first part of the first body 1352, which can be substantially parallel to the second body 1353 and in sliding cooperation with the moving spring mechanism 131, and the part of the first body 1352 close to and connected to the support structure 136 is a second part of the first body 1352, which can be inclined to the support structure 136, as long as the support structure 136 can form the support surface 1362 inside the first body 1352 to meet the support requirements of the moving spring mechanism 131. In the present embodiment, the connection relationship among the first body 1352, the second body 1353, and the support structure 136 can refer to the embodiment shown in FIGS. 1 and 2, which will not be described here.

[0101] Please refer to FIG. 36 and FIG. 37, in some embodiments, the support 135 comprises 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, and two first arms 1351 are connected to two ends of the connecting body 1358. The support structure 136 is spaced apart from the first arm 1351 and connected to the edges of the connecting body 1358, the support structure 1351 is located on the outer side of the elastic element 132 in the axial direction, the support structure 1351 can comprise two parts connected to form a substantially inverted L shape, one part is connected to the connecting body 1358 and is substantially perpendicular to the connecting body 1358, 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 of the connecting body 1358 away from the support surface 1362. In this embodiment, the support surface 1362 can be opposite to the moving spring sheet 1311, or opposite to the lower armature 1314. The support structure 136 can be provided with two, two support structures 136 are connected to opposite edges of the connecting body 1358, respectively, and are located on the opposite sides of the elastic element 132 in the axial direction, and the line connecting the two support structures 136 can intersect the projection of the line connecting the two first arms 1351 on the connecting body 1358, for example, perpendicular, to reasonably arrange the layout of each component and avoid interference between each component.

[0102] The technical features of the above-mentioned embodiments can be combined in any way. In order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, but as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0103] The above-mentioned embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A high-voltage direct-current relay, comprising: a static contact provided with a static contact point; a moving assembly comprising a pushing mechanism, a moving spring mechanism provided with a moving contact point opposite to the static contact point, and an elastic element, the moving spring mechanism being elastically coupled with the pushing mechanism through the elastic element; the moving assembly is formed with a support surface, the support surface being arranged apart from the moving spring mechanism, and the support surface is used to support the moving spring mechanism on a path of the moving spring mechanism moving away from the static contact when a short-circuit current occurs to cause the moving contact point and the static contact point to be repelled.

2. The high-voltage DC relay according to claim 1, wherein the pushing mechanism is capable of driving the moving spring mechanism to move towards the static contact point, so that the moving assembly has a first state in which the moving contact point is just in contact with the static contact point, and a second state in which the moving contact point is abutted against the static contact point by the elastic element, the moving spring mechanism is spaced apart from the support surface, and during switching from the first state to the second state, the pushing mechanism moves towards the static contact point relative to the moving spring mechanism, and the distance between the moving spring mechanism and the support surface in the second state is smaller than that in the first state.

3. The high-voltage DC relay according to claim 2, wherein, 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 moving spring mechanism and the support surface.

4. The high-voltage DC relay of claim 2, wherein, when the short-circuit current occurs, the moving contact point is capable of being repelled relative to the static contact point under the action of an electric repulsive force to switch from the second state to a third state, in the third state, the support surface abuts against the moving spring mechanism to make the moving spring mechanism relatively fixed with the pushing mechanism, and the length of the elastic element is greater than the limit compression length.

5. The high-voltage DC relay of claim 2, wherein, the moving spring mechanism comprises a relatively fixed lower armature and a moving spring sheet, the moving contact point is arranged on a side of the moving spring sheet facing the static contact, and the support surface is capable of abutting against the lower armature and / or the moving spring sheet on a path of the moving spring mechanism moving towards the pushing mechanism.

6. The high-voltage DC relay according to claim 5, wherein, the high-voltage direct-current relay further comprises an upper armature opposite to the lower armature, the upper armature and the lower armature are capable of attracting each other when the moving contact point and the static contact point are in contact; wherein the upper armature is arranged on the bracket, or the upper armature is arranged outside the moving assembly and is relatively fixed with the static contact.

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

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

9. The high-voltage DC relay according to any one of claims 1-7, wherein, the high-voltage direct-current relay further comprises a base and an electromagnetic assembly, the static contact of the electromagnetic assembly is arranged on the base, the pushing mechanism comprises a pushing seat and a pushing rod arranged on a side of the pushing seat away from the moving spring mechanism, the pushing rod is inserted into the electromagnetic assembly, and the electromagnetic assembly is used to drive the pushing seat to move towards or away from the static contact through the pushing rod.

10. The high-voltage DC relay according to claim 9, wherein, The elastic element is arranged between the pusher seat and the moving spring mechanism, and the two ends are respectively abutted against the moving spring mechanism and the pusher seat.

11. The high-voltage DC relay of claim 9, wherein, The support surface is located between the moving spring mechanism and the pusher seat, and is arranged in a spaced manner with the moving spring mechanism and the pusher seat.

12. The high-voltage DC relay according to any one of claims 1-7, wherein, The pusher mechanism comprises the pusher seat and the pusher rod connected with each other, and the moving assembly further comprises a bracket and a fixing plate connected with the bracket and the pusher seat, and the bracket is in sliding fit with the moving spring mechanism, wherein the support surface is formed on the bracket, the fixing plate and / or the pusher mechanism.

13. The high-voltage DC relay of claim 12, wherein, The bracket comprises two first supporting arms, the two first supporting arms are respectively located on the two sides of the elastic element in the axial direction, and are connected with the pusher seat, and the support surface is formed on at least one of the first supporting arms.

14. The high-voltage DC relay of claim 13, wherein, The first supporting arm comprises an integrally formed supporting arm body and a support structure, at least part of the support structure is located on the side of the supporting arm body facing the moving spring mechanism, and the side of the support structure facing the moving spring mechanism forms the support surface.

15. The high-voltage DC relay of claim 14, wherein, The first supporting arm is provided with two support structures, and the two support structures are respectively connected with the opposite edges of the supporting arm body. Alternatively, the supporting arm body is provided with a through hole, and the support structure is connected with the supporting arm body in the through hole.

16. The high-voltage DC relay of claim 13, wherein, The first supporting arm comprises an integrally formed first body, a second body and a support structure, the first body is in sliding fit with the moving spring mechanism, the second body is connected with the pusher seat, the support structure is connected with the first body and the second body and intersects with the first body and the second body, and the side of the support structure facing the moving spring mechanism forms the support surface.

17. The high-voltage DC relay of claim 16, wherein, The first body is located on the outside of the second body, and the first body, the support structure and the second body form a stepped structure.

18. The high-voltage DC relay of claim 16, wherein, The first body has a first part and a second part connected with each other, the first part is in sliding fit with the moving spring mechanism, the second part is connected with the support structure and is inclined to the support structure, and the part of the support structure facing the moving spring mechanism and located on the inside of the first body forms the support surface.

19. The high-voltage DC relay of claim 12, wherein, The bracket comprises an integrally formed connecting body, a support structure and two first supporting arms, the connecting body is arranged on the pusher seat, the two first supporting arms are respectively connected with the opposite edges of the connecting body and are in sliding fit with the moving spring mechanism, the support structure is arranged on the connecting body and is located between the two first supporting arms, the support structure protrudes from the side of the pusher seat facing the moving spring mechanism, and the side of the support structure facing the moving spring mechanism forms the support surface.

20. The high-voltage DC relay of claim 19, wherein, The support structure is substantially in the shape of a cylinder, and one end of the elastic element is sleeved on the support structure; and / or The support structure is substantially in the shape of a hollow cylinder to form a circular annular support surface.

21. The high-voltage DC relay of claim 12, wherein, The support structure is integrally formed with the connecting body, and is spaced apart from the first support arms and connected to the edges of the connecting body.

22. The high-voltage DC relay of claim 21, wherein, The support structure is integrally formed with the connecting body, and is spaced apart from the first support arms and connected to the edges of the connecting body.

23. The high-voltage DC relay of claim 12, wherein, The fixing sheet includes at least two connecting portions, which are located on opposite sides of the elastic element in the axial direction and are connected to the pusher seat and the support frame.

24. The high-voltage DC relay of claim 23, wherein, The connecting portion includes integrally formed first and second connecting plates intersecting with each other, the first connecting plate is connected to the pusher seat, and the second connecting plate is connected to the support frame.

25. The high-voltage DC relay of claim 24, wherein, At least part of the support frame is located outside the first connecting plate, and the first connecting plate, the second connecting plate and the part of the support frame form a stepped structure.

26. The high-voltage DC relay of claim 12, wherein, The fixing sheet includes a sheet-shaped body and support structures and two connecting portions integrally formed with the sheet-shaped body, the sheet-shaped body is embedded in the pusher seat, the two connecting portions are respectively connected to opposite edges of the sheet-shaped body and are connected to the support frame, the support structures protrude from one side of the pusher seat facing the dynamic spring mechanism, and one side of the support structures facing the dynamic spring mechanism forms the support surface.

27. The high-voltage DC relay of claim 26, wherein, The fixing sheet is provided with two support structures, and the connecting lines of the two support structures intersect with the connecting lines of the two connecting portions on the sheet-shaped body.

28. The high-voltage DC relay of claim 12, wherein, The pusher mechanism further includes a support structure integrally formed with the pusher seat, the support structure is arranged on one side of the pusher seat facing the dynamic spring mechanism, and one side of the support structure facing the dynamic spring mechanism forms the support surface.

29. The high-voltage DC relay of claim 28, wherein, The support structure surrounds the elastic element, wherein the support structure forms the support surface arranged around the elastic element.

30. The high-voltage DC relay of claim 28, wherein, The support structure surrounds the elastic element and is provided with a plurality of grooves arranged towards the dynamic spring mechanism, the plurality of grooves are sequentially and spaced apart along the circumferential direction of the elastic element, and the side walls of adjacent two grooves are connected by the support surface.

31. The high-voltage DC relay of claim 12, wherein, The dynamic spring mechanism is formed with a sliding structure, the support frame is provided with a sliding groove, and the sliding structure is at least partially and slidably arranged in the sliding groove, the side wall of the sliding groove is located on the side of the sliding structure facing the pusher seat and forms the support surface with the part opposite to the sliding structure.

32. The high-voltage DC relay of claim 31, wherein, The moving spring mechanism comprises a relatively fixed lower armature and a moving spring sheet, the moving contact is arranged on one side of the moving spring sheet facing the fixed contact, the sliding structure is protruded from one side of the lower armature facing the support and integrally formed with the lower armature, and / or the sliding structure is protruded from one side of the moving spring sheet facing the support and integrally formed with the moving spring sheet.

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