A high-voltage direct-current relay

Abstract

The application provides a high-voltage direct-current relay, which comprises an electromagnetic assembly, a push rod assembly, a load assembly and a guide structure, the load assembly comprises a static contact and a moving point block, the arrangement direction of the static contact and the moving point block is a vertical direction, one end of the push rod assembly is in transmission connection with the electromagnetic assembly, the other end is connected with the moving point block, the electromagnetic assembly drives the moving point block to reciprocate in the vertical direction, so that the moving point block is switched between an on state and an off state; in the on state, the moving point block is in contact with the static contact, when switching from the on state to the off state, the moving point block rotates around the axis of the push rod under the action of the guide structure, and in the off state, the projection of the moving point block and the static contact on a horizontal plane are dislocated from each other. The application makes the moving point block rotate synchronously in the breaking process through the guide structure, increases the contact breaking gap by using the horizontal displacement generated by rotation without increasing the height direction size of the product, makes the electric arc more easily broken, and improves the contact breaking performance of the relay.

Description

Technical Field

[0001] This invention belongs to the field of electrical components technology, and specifically relates to a high-voltage DC relay. Background Technology

[0002] High-voltage DC relays are widely used in new energy vehicles, energy storage systems, and other fields, undertaking the function of switching on and off high-voltage DC circuits. During the relay disconnection process, an electric arc is generated between the moving contact block and the stationary contact. The greater the arc energy and the smaller the contact gap, the more difficult it is to extinguish the arc, which can lead to contact erosion or even product failure in severe cases.

[0003] As market demand for product miniaturization continues to increase, the arc-extinguishing chamber space of high-voltage DC relays is becoming increasingly limited, and the contact gap between the moving contact block and the stationary contact is also shrinking. Under high-voltage and high-current conditions, the arc energy generated during breaking is large, and the arc cannot be extinguished in time within the limited contact gap, resulting in a decline in breaking performance.

[0004] In existing technologies, the moving block only performs linear motion in the vertical direction during the breaking process, and the contact gap is limited by the space in the product's height direction, making it difficult to further increase. Therefore, how to improve the breaking performance of the relay without increasing the product's height dimension is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] To solve at least one of the above-mentioned technical problems, the present invention provides a high-voltage DC relay for rapid arc extinguishing.

[0006] This invention provides a high-voltage DC relay, comprising an electromagnetic component, a push rod assembly, a load assembly, and a guide structure. The push rod assembly includes a push rod, and the load assembly includes a stationary contact and a moving contact block. The stationary contact and the moving contact block are arranged vertically. One end of the push rod assembly is connected to the electromagnetic component, and the other end of the push rod assembly is connected to the moving contact block. The electromagnetic component drives the moving contact block to reciprocate vertically, switching the moving contact block between an on state and an off state. In the on state, the moving contact block is in contact with the stationary contact. When switching from the on state to the off state, the moving contact block rotates around the axis of the push rod under the action of the guide structure. In the off state, the projections of the moving contact block and the stationary contact on the horizontal plane are misaligned.

[0007] This invention uses a guiding structure to make the moving block rotate synchronously around the push rod axis during the breaking process. Without increasing the product's height dimension, the horizontal displacement generated by the rotation increases the actual breaking gap of the contacts, making it easier for the arc to be broken, thus effectively improving the contact breaking performance of the relay.

[0008] As an optional implementation, there are two stationary contacts, which are arranged at intervals along a first direction. The moving contact block extends along the first direction. In the connected state, the extension direction of the moving contact block is parallel to the arrangement direction of the two stationary contacts. In the disconnected state, the extension direction of the moving contact block is set at an angle to the arrangement direction of the two stationary contacts, forming a misalignment.

[0009] As an optional implementation, the guide structure includes a guide seat and a guide rod. The guide seat is provided with a continuously extending guide groove. The guide rod is fixedly mounted on the push rod assembly, and the end of the guide rod can slide along the guide groove, thereby driving the moving block to rotate around the axis of the push rod.

[0010] As an optional implementation, the guide groove includes a vertical section and an inclined section that are interconnected. The vertical section is located near the stationary contact and extends in a vertical direction. The inclined section extends obliquely from the end of the vertical section away from the stationary contact in both vertical and horizontal directions.

[0011] As an optional implementation, the electromagnetic component includes a yoke panel, the push rod assembly passes through the yoke panel, the load assembly is disposed on one side of the yoke panel, the electromagnetic component is disposed on the other side of the yoke panel, and the guide seat is fixedly disposed on the surface of the yoke panel facing the load assembly.

[0012] As an optional implementation, the guide seat includes a horizontal fixing part and a vertical guide part. The horizontal fixing part is fixed to the surface of the yoke panel facing the load assembly. The vertical guide part extends from the side of the horizontal fixing part near the push rod toward the load assembly. The guide groove is provided on the side of the vertical guide part facing the push rod.

[0013] As an optional implementation, the push rod assembly further includes a fixing member and a push spring. The moving point block has a through hole for the push rod to pass through. The moving point block is axially slidable but circumferentially limited and sleeved on the push rod through the through hole. The fixing member is disposed at the end of the push rod facing the stationary contact and presses against the upper surface of the moving point block. The push spring is sleeved on the push rod and abuts against the lower surface of the moving point block. The push spring includes at least two springs that are coaxially arranged and interlocked.

[0014] As an optional implementation, the push rod is provided with a first through hole, the guide rod is horizontally inserted through the first through hole, and the end of the guide rod extends into the guide groove.

[0015] As an optional implementation, the push rod assembly further includes a spring seat and a push block sleeved outside the push rod. The spring seat abuts against the end of the push spring away from the moving point block. The edge of the spring seat is provided with a retaining portion protruding towards the push spring. The surface of the spring seat away from the push spring abuts against the push block. The push block is provided with a second through hole and a third through hole at positions corresponding to both ends of the first through hole. The guide rod passes through the first through hole, the second through hole, and the third through hole.

[0016] As an optional implementation, the end of the guide rod that extends into the guide groove is hemispherical, and the guide groove is configured to have an arc-shaped cross-section.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention, by setting a guiding structure, allows the moving block to rotate synchronously around the push rod axis under the action of the guiding structure during the disconnection process. This causes the moving block and the stationary contact to be misaligned in the horizontal direction, thereby effectively increasing the actual breaking gap between the moving block and the stationary contact without increasing the product's height dimension. This makes it easier for the arc to be broken, effectively achieving rapid arc extinguishing and significantly improving the contact breaking performance of the product. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a top view of a high-voltage DC relay according to an embodiment of the present invention.

[0020] Figure 2 yes Figure 1 A cross-sectional view along line AA.

[0021] Figure 3 yes Figure 2 A magnified view of a portion of region B in the middle.

[0022] Figure 4 This is a three-dimensional structural schematic diagram of a high-voltage DC relay according to an embodiment of the present invention (the outer casing structure is not shown).

[0023] Explanation of key figure labels: 1. Push rod assembly; 11. Push rod; 111. First through hole; 12. Fixing component; 121. Locking component; 122. Washer; 13. Push spring; 14. Spring seat; 141. Enclosure part; 15. Push block; 151. Second through hole; 152. Third through hole; 2. Load assembly; 21. Stationary contact; 22. Moving point block; 3. Guide structure; 31. Guide seat; 311. Guide groove; 3111. Vertical section; 3112. Inclined groove section; 312. Horizontal fixing part; 313. Vertical guide part; 32. Guide rod; 4. Yoke plate. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0026] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0027] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0028] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0029] The technical solution of the present invention will be further described below with reference to the embodiments and accompanying drawings.

[0030] Please see Figure 1 and Figure 2 As shown, this invention provides a high-voltage DC relay, including an electromagnetic assembly, a push rod assembly 1, a load assembly 2, and a guide structure 3. The push rod assembly 1 includes a push rod 11, and the load assembly 2 includes a stationary contact 21 and a moving block 22, with the stationary contact 21 and the moving block 22 arranged vertically. One end of the push rod assembly 1 is connected to the electromagnetic assembly, and the other end is connected to the moving block 22. The electromagnetic assembly drives the moving block 22 to reciprocate vertically, switching it between an on and off state. In the on state, the moving block 22 is in contact with the stationary contact 21; when switching from the on state to the off state, the moving block 22 rotates around the axis of the push rod 11 under the action of the guide structure 3; in the off state, the projections of the moving block 22 and the stationary contact 21 on the horizontal plane are misaligned.

[0031] With the above structure, the electromagnetic component acts as a driving source, controlling the reciprocating motion of the moving block 22 in the vertical direction through the transmission action of the push rod assembly 1, thereby switching between the on and off states. Unlike the prior art where the moving block 22 only performs linear motion in the vertical direction, in this invention, during the disconnection process, the moving block 22 rotates synchronously around the axis of the push rod 11 under the action of the guide structure 3, causing the moving block 22 and the stationary contact 21 to be misaligned in the horizontal direction. This effectively increases the actual breaking gap between the moving block 22 and the stationary contact 21 without increasing the product's height dimension, making it easier for the arc to be broken and significantly improving the contact breaking performance of the product.

[0032] Specifically, there are two stationary contacts 21, which are arranged at intervals along a first direction. The moving block 22 extends along the first direction. In the energized state, the extension direction of the moving block 22 is parallel to the arrangement direction of the two stationary contacts 21, and both ends of the moving block 22 are in positive contact with the two stationary contacts 21, achieving synchronous conduction of the two contacts. This results in a large contact area and high reliability of conduction. In the de-energized state, the moving block 22 rotates around the axis of the push rod 11 under the action of the guide structure 3. The extension direction of the moving block 22 is set at an angle to the arrangement direction of the two stationary contacts 21, forming a misalignment. This design of double-contact rotational misalignment ensures that the projections of the moving block 22 and the two stationary contacts 21 in the horizontal plane do not overlap, and sufficient breaking gaps are formed at both contacts. This effectively avoids the risk of bending of the push rod 11 due to uneven force caused by electric repulsion when the single contact is eccentrically arranged. At the same time, this structure allows the arc at both contacts to be fully stretched, further improving the breaking reliability of the product.

[0033] Please see Figure 2 and Figure 3 As shown, further, as a specific example, the guide structure 3 includes a guide seat 31 and a guide rod 32. The guide seat 31 is provided with a continuously extending guide groove 311. The guide rod 32 is fixedly mounted on the push rod assembly 1 and the end of the guide rod 32 can slide along the guide groove 311, thereby driving the moving block 22 to rotate around the axis of the push rod 11.

[0034] The guide seat 31 is fixed as a stationary component, and the guide rod 32 is fixed to the push rod assembly 1 and moves synchronously with it. The end of the guide rod 32 extends into the guide groove 311 of the guide seat 31. When the push rod assembly 1 moves vertically under the drive of the electromagnetic component, the end of the guide rod 32 is constrained by the groove wall of the guide groove 311 and can only slide along the predetermined trajectory of the guide groove 311. The trajectory of the guide groove 311 determines the movement path of the guide rod 32, which in turn drives the moving block 22 to rotate around the axis of the push rod 11. The continuous extension of the guide groove 311 ensures that the guide rod 32 remains within the constraint of the guide groove 311 throughout the entire movement, resulting in smooth and reliable operation.

[0035] Please see Figure 2 and Figure 3 As shown, further, as a specific example, the guide groove 311 includes a vertical section 3111 and an inclined groove section 3112 that are interconnected. The vertical section 3111 is located at one end near the stationary contact 21 and extends in the vertical direction. The inclined groove section 3112 extends obliquely from the end of the vertical section 3111 away from the stationary contact 21 in both the vertical and horizontal directions.

[0036] The vertical section 3111 is located at the end of the guide groove 311 near the stationary contact 21. In the energized state, the end of the guide rod 32 is located within the vertical section 3111. The vertical section 3111 provides vertical constraint on the guide rod 32, preventing the moving block 22 from rotating in the energized state. This ensures that the moving block 22 and the stationary contact 21 maintain stable positive contact. At the same time, the vertical section 3111 has a certain length in the vertical direction. When the moving block 22 is in the energized state, the end of the guide rod 32 is located on the side of the vertical section 3111 closest to the stationary contact 21. This prevents the end of the guide rod 32 from sliding into the inclined groove section 3112 due to vibration, which would cause contact misalignment in the working state and improve contact reliability. The inclined groove section 3112 extends both vertically and horizontally. When the push rod assembly 1 moves to the disconnected state, the end of the guide rod 32 enters the inclined groove section 3112 from the vertical section 3111. The inclination direction of the inclined groove section 3112 causes the guide rod 32 to generate a horizontal displacement while moving downward with the push rod assembly 1, thereby driving the moving point block 22 to rotate around the axis of the push rod 11, increasing the contact breaking gap. The vertical section 3111 and the inclined groove section 3112 are interconnected, ensuring a smooth transition of the guide rod 32 between the two sections, with smooth and unhindered movement.

[0037] Please see Figure 2 As shown, as a specific example, the electromagnetic component includes a yoke panel 4, a push rod assembly 1 passing through the yoke panel 4, a load assembly 2 disposed on one side of the yoke panel 4, an electromagnetic component disposed on the other side of the yoke panel 4, and a guide seat 31 fixedly disposed on the surface of the yoke panel 4 facing the load assembly 2.

[0038] The yoke panel 4 serves as the structural base plate of the electromagnetic component, separating the load component 2 and the electromagnetic component on both sides, resulting in a clear layout and easy assembly. The guide seat 31 is fixed to the surface of the yoke panel 4 facing the load component 2, placing the guide seat 31, push rod assembly 1, and moving block 22 on the same side, resulting in a compact structure. The fit between the guide rod 32 and the guide groove 311 is not affected by the electromagnetic component. The push rod assembly 1 passes through the yoke panel 4, transmitting the driving force of the electromagnetic component to the load component 2, achieving linkage between the two sides of the structure.

[0039] Please see Figure 3 As shown, as a specific example, the guide seat 31 includes a horizontal fixing part 312 and a vertical guide part 313. The horizontal fixing part 312 is fixed to the surface of the yoke plate 4 facing the load assembly 2. The vertical guide part 313 extends from the side of the horizontal fixing part 312 near the push rod 11 toward the load assembly 2. The guide groove 311 is provided on the side of the vertical guide part 313 facing the push rod 11.

[0040] The guide seat 31 adopts a bent structure. The horizontal fixing part 312 provides a fixed mounting surface for the yoke plate 4, ensuring a stable and reliable installation. The vertical guide part 313 extends upward from the horizontal fixing part 312, so that the side where the guide groove 311 is located faces the push rod 11, ensuring that the end of the guide rod 32 can slide smoothly along the guide groove 311. This bent integrated structure is easy to manufacture and realizes the installation, fixing and guiding functions of the guide seat 31 in a limited space, which is conducive to the miniaturization design of the product.

[0041] Please see Figure 4 As shown in the figure, as a specific example, the push rod assembly 1 also includes a fixing member 12 and a push spring 13. The moving point block 22 is provided with a through hole for the push rod 11 to pass through. The moving point block 22 is slidably sleeved on the push rod 11 through the through hole. The moving point block 22 can slide along the axial direction of the push rod 11 but is circumferentially limited, that is, the moving point block 22 cannot rotate around the axis of the push rod 11. The fixing member 12 is provided at the end of the push rod 11 facing the stationary contact 21 and is pressed against the upper surface of the moving point block 22. The push spring 13 is sleeved on the push rod 11 and abuts against the lower surface of the moving point block 22. The push spring 13 includes at least two springs that are coaxially arranged and inner and outer sleeved.

[0042] The axially sliding and circumferentially limiting fit between the moving block 22 and the push rod 11 can be achieved in various ways. In this embodiment, the cross-section of the through portion of the push rod 11 is designed as D-shaped, and the shape of the through hole on the moving block 22 is adapted to it. The planar portion of the D-shaped cross-section forms a circumferential constraint on the moving block 22, preventing the moving block 22 from rotating relative to the push rod 11. In another embodiment, the push rod 11 and the moving block 22 can be connected by a spline. The toothed structure of the spline transmits the circumferential constraint while allowing the moving block 22 to slide freely in the axial direction. In another embodiment, an axially extending keyway can be provided on the outer wall of the push rod 11, and a corresponding convex key can be provided on the inner wall of the through hole of the moving block 22. The convex key is embedded in the keyway to achieve synchronous constraint of axial guidance and circumferential limiting. All the above implementation methods are within the protection scope of this invention as long as they can ensure that the moving block 22 rotates synchronously around the axis of the push rod 11 under the drive of the push rod 11, while retaining the sliding degree of freedom in the axial direction.

[0043] The fixing member 12 forms an axial limit on the top of the moving point block 22 from above, and the push spring 13 pushes the moving point block 22 from below. The moving point block 22 can slide axially along the push rod 11 between the fixing member 12 and the push spring 13. During the connection process, after the push rod assembly 1 drives the moving point block 22 to contact the stationary contact 21, the push rod assembly 1 continues to move upward to the end of the stroke. At this time, the moving point block 22 is blocked by the stationary contact 21 and stops moving upward. The push rod 11 continues to slide upward relative to the moving point block 22, and the push spring 13 is further compressed. The amount of compression corresponds to the overtravel amount. The push spring 13 continues to push the moving point block 22 upward within the overtravel range, so that the moving point block 22 and the stationary contact 21 maintain a stable contact pressure, ensuring reliable contact conduction. The push spring 13 includes at least two springs that are coaxially arranged and interlocked. The structure of multiple springs interlocked provides greater elastic force than a single spring, increasing the contact pressure between the moving block 22 and the stationary contact 21 and improving contact reliability. At the same time, the multi-spring structure provides more uniform and stable constraint on the moving block 22, which helps the moving block 22 to remain stable during rotation.

[0044] Furthermore, as a specific example, the fixing member 12 includes a washer 122 and a locking member 121. The locking member 121 presses the washer 122 against the upper surface of the moving block 22. The washer 122 increases the contact area between the fixing member 12 and the upper surface of the moving block 22, making the clamping force evenly distributed and preventing the moving block 22 from being damaged due to excessive local force. The locking member 121 presses and fixes the washer 122, which is simple in structure, easy to install and disassemble, and convenient for maintenance. At the same time, the combination of the washer 122 and the locking member 121 can make the fixation between the moving block 22 and the push rod assembly 1 more secure. The washer 122 can provide greater friction for the rotation of the moving block 22, ensuring the effectiveness of the guide structure 3.

[0045] Please see Figure 4 As shown in the figure, as a specific example, the push rod 11 is provided with a first through hole 111, the guide rod 32 is horizontally inserted in the first through hole 111, and the end of the guide rod 32 extends into the guide groove 311.

[0046] The guide rod 32 is horizontally inserted into the first through hole 111 of the push rod 11, forming a fixed connection with the push rod 11 and moving synchronously with the push rod 11. The end of the guide rod 32 extends into the guide groove 311, forming a sliding fit with the guide groove 311. This insertion method results in a compact structure, a stable connection between the guide rod 32 and the push rod 11, and prevents the guide rod 32 from deflecting during the reciprocating motion of the push rod 11, ensuring that the end of the guide rod 32 always moves along the predetermined trajectory of the guide groove 311, resulting in high transmission accuracy.

[0047] Please see Figure 4As shown in the figure, as a specific example, the push rod assembly 1 also includes a spring seat 14 and a push block 15 sleeved on the push rod 11. The spring seat 14 abuts against the end of the push spring 13 away from the moving point block 22. The edge of the spring seat 14 is provided with a retaining part 141 protruding towards the push spring 13. The surface of the spring seat 14 away from the push spring 13 abuts against the push block 15. The push block 15 is provided with a second through hole 151 and a third through hole 152 at the positions corresponding to the two ends of the first through hole 111. The guide rod 32 passes through the first through hole 111, the second through hole 151 and the third through hole 152.

[0048] The spring seat 14 provides a stable support surface for the push spring 13. The retaining portion 141 on the edge of the spring seat 14 protrudes towards the push spring 13, locking the lower end of the push spring 13 inside the retaining portion 141. This prevents the push spring 13 from shifting horizontally during operation, ensuring that the push spring 13 always applies force to the moving block 22 in a vertical direction, thus improving operational stability. The push block 15 abuts against the lower part of the spring seat 14 and, in conjunction with the push rod 11, transmits the pushing force of the electromagnetic component. The push block 15 has a second through hole 151 and a third through hole 152, which, together with the first through hole 111 on the push rod 11, allow the guide rod 32 to pass through. The guide rod 32 passes through the first through hole 111, the second through hole 151, and the third through hole 152, so that the guide rod 32, the push rod 11, and the push block 15 form an integrated linkage, ensuring that the push block 15 moves synchronously with the push rod 11. At the same time, the guide rod 32 is installed at the push block 15 below the spring seat 14, which effectively avoids interference between the guide rod 32 and the push spring 13.

[0049] Please see Figure 3 As shown, as a specific example, the end of the guide rod 32 that extends into the guide groove 311 is hemispherical, and the guide groove 311 is configured to have a circular arc cross-section.

[0050] The hemispherical design at the end of the guide rod 32 is compatible with the arc-shaped cross-section of the guide groove 311, forming a sliding fit between them. This effectively reduces the frictional resistance when the guide rod 32 slides within the guide groove 311, making the rotation of the moving block 22 smoother and more flexible. Simultaneously, the hemispherical end avoids corner jamming at the junction of the inclined section 3112 and the vertical section 3111 of the guide groove 311, preventing motion stagnation and improving the reliability of the guiding function.

[0051] The working process of the high-voltage DC relay structure in this embodiment of the invention is as follows: When switching from the off state to the on state, the electromagnetic component is energized, and the yoke panel 4 attracts the push rod assembly 1 to move closer to the stationary contact 21. During the upward movement of the push rod assembly 1, the end of the guide rod 32 slides from the inclined groove section 3112 into the vertical section 3111. Guided by the inclined groove section 3112, the moving block 22 rotates around the axis of the push rod 11, gradually aligning with the stationary contact 21. When the guide rod 32 is fully inside the vertical section 3111, the moving block 22 stops rotating and faces the stationary contact 21. The push rod assembly 1 continues to move upward, and the moving block 22, under the elastic force of the push spring 13, contacts the stationary contact 21 and maintains a stable contact pressure, and the relay enters the on state. In the on state, the guide rod 32 is located within the vertical section 3111, and the vertical section 3111 constrains the rotational freedom of the moving block 22, preventing the moving block 22 from rotating out of position due to external vibrations, thus ensuring the reliability of the contact.

[0052] When switching from the ON state to the OFF state, the electromagnetic component is de-energized, and the push rod assembly 1 moves away from the stationary contact 21 under the action of the return spring. In the initial stage of the downward movement of the push rod assembly 1, the end of the guide rod 32 moves within the vertical section 3111, and the moving block 22 moves vertically downward with the push rod assembly 1, disengaging from the stationary contact 21. Subsequently, the end of the guide rod 32 enters the inclined groove section 3112 from the vertical section 3111. The trajectory of the inclined groove section 3112, which extends both vertically and horizontally, forces the guide rod 32 to produce a horizontal displacement while continuing to move downward, causing the moving block 22 to rotate around the axis of the push rod 11, gradually misaligning the moving block 22 with the stationary contact 21 in the horizontal direction. In the OFF state, the actual breaking gap between the moving block 22 and the stationary contact 21 increases from the pure vertical travel gap to the spatial gap resulting from the superposition of the vertical and horizontal directions. The arc breaking distance is significantly increased, the arc is more easily extinguished, and the contact breaking performance of the relay is effectively improved.

[0053] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. A high-voltage DC relay, characterized in that, The device includes an electromagnetic component, a push rod assembly, a load assembly, and a guide structure. The push rod assembly includes a push rod, and the load assembly includes a stationary contact and a moving point block. The stationary contact and the moving point block are arranged vertically. One end of the push rod assembly is connected to the electromagnetic component, and the other end is connected to the moving point block. The electromagnetic component drives the moving point block to reciprocate vertically, switching the moving point block between an on and off state. In the on state, the moving point block is in contact with the stationary contact. When switching from the on state to the off state, the moving point block rotates around the axis of the push rod under the action of the guide structure. In the off state, the projections of the moving point block and the stationary contact on the horizontal plane are misaligned.

2. A high-voltage DC relay as described in claim 1, characterized in that, The stationary contact is provided in two parts, which are arranged at intervals along a first direction. The moving contact block extends along the first direction. In the connected state, the extension direction of the moving contact block is parallel to the arrangement direction of the two stationary contacts. In the disconnected state, the extension direction of the moving contact block is set at an angle to the arrangement direction of the two stationary contacts, forming a misalignment.

3. A high-voltage DC relay as described in claim 1, characterized in that, The guiding structure includes a guide seat and a guide rod. The guide seat is provided with a continuously extending guide groove. The guide rod is fixedly mounted on the push rod assembly, and the end of the guide rod can slide along the guide groove, thereby driving the moving block to rotate around the axis of the push rod.

4. A high-voltage DC relay as described in claim 3, characterized in that, The guide groove includes a vertical section and an inclined section that are interconnected. The vertical section is located at one end near the stationary contact and extends in the vertical direction. The inclined section extends obliquely from the end of the vertical section away from the stationary contact in both the vertical and horizontal directions.

5. A high-voltage DC relay as described in claim 3, characterized in that, The electromagnetic component includes a yoke panel, the push rod assembly passes through the yoke panel, the load assembly is disposed on one side of the yoke panel, the electromagnetic component is disposed on the other side of the yoke panel, and the guide seat is fixedly disposed on the surface of the yoke panel facing the load assembly.

6. A high-voltage DC relay as described in claim 5, characterized in that, The guide seat includes a horizontal fixing part and a vertical guide part. The horizontal fixing part is fixed to the surface of the yoke panel facing the load assembly. The vertical guide part extends from the side of the horizontal fixing part near the push rod toward the load assembly. The guide groove is provided on the side of the vertical guide part facing the push rod.

7. A high-voltage DC relay as described in claim 3, characterized in that, The push rod assembly further includes a fixing member and a push spring. The moving point block has a through hole for the push rod to pass through. The moving point block can slide axially through the through hole but is circumferentially limited and sleeved on the push rod. The fixing member is disposed at the end of the push rod facing the stationary contact and presses against the upper surface of the moving point block. The push spring is sleeved on the push rod and abuts against the lower surface of the moving point block. The push spring includes at least two springs that are coaxially arranged and interlocked.

8. A high-voltage DC relay as described in claim 7, characterized in that, The push rod has a first through hole, the guide rod is horizontally inserted through the first through hole, and the end of the guide rod extends into the guide groove.

9. A high-voltage DC relay as described in claim 8, characterized in that, The push rod assembly further includes a spring seat and a push block sleeved on the push rod. The spring seat abuts against the end of the push spring away from the moving point block. The edge of the spring seat is provided with a retaining portion protruding towards the push spring. The surface of the spring seat away from the push spring abuts against the push block. The push block is provided with a second through hole and a third through hole at positions corresponding to both ends of the first through hole. The guide rod passes through the first through hole, the second through hole, and the third through hole.

10. A high-voltage DC relay as described in claim 3, characterized in that, The end of the guide rod that extends into the guide groove is hemispherical, and the guide groove is configured to have a circular arc cross-section.

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