High-voltage direct-current relay

Abstract

The utility model relates to the technical field of electronic control devices, in particular to a high-voltage direct-current relay which comprises an insulating cover, an insulating seat and an auxiliary static spring, the insulating cover is connected with the insulating seat, and the insulating cover is provided with a fixing hole; the side, facing the insulating cover, of the insulating base is provided with an installation structure, the auxiliary static spring is provided with a contact end and a leading-out end, the part, close to the contact end, of the auxiliary static spring is installed on the installation structure, the part, close to the leading-out end, of the auxiliary static spring penetrates through the fixing hole, and the leading-out end is located outside the insulating cover. The part, close to the contact end, of the auxiliary static spring is installed on the installation structure, the part, close to the leading-out end, of the auxiliary static spring is arranged in the fixing hole in a penetrating mode, stable installation of the auxiliary static spring is achieved, and the leading-out end of the auxiliary static spring is located outside the insulation cover to achieve signal detection.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic control devices, in particular to a high-voltage direct current relay. Background Art

[0002] A relay is an electronic control device with a control circuit (also known as an input circuit) and a controlled system (also known as an output circuit). It is commonly used in automatic control circuits. A relay is essentially an "automatic switch" that uses a smaller current to control a larger one. Therefore, it plays a role in automatic regulation, safety protection, and circuit switching.

[0003] In related art, high-voltage DC relays are typically equipped with auxiliary contact structures to facilitate detection or monitoring functions within control circuits. These structures typically include an auxiliary moving spring and an auxiliary static spring. However, the installation of the auxiliary static spring is unstable, and during repeated engagement of the moving and static springs, the position of the auxiliary static spring can easily shift, leading to poor contact. Utility Model Content

[0004] The embodiment of the utility model provides a high-voltage DC relay to enhance the installation stability of the auxiliary static spring and ensure good contact performance.

[0005] The high-voltage DC relay provided by an embodiment of the present utility model includes an insulating cover, an insulating seat and an auxiliary static spring. The insulating cover is connected to the insulating seat, and the insulating cover is provided with a fixing hole; the insulating seat is provided with a mounting structure on the side facing the insulating cover, and the auxiliary static spring has a contact end and a lead-out end. The part of the auxiliary static spring close to the contact end is mounted on the mounting structure, and the part of the auxiliary static spring close to the lead-out end is passed through the fixing hole, and the lead-out end is located outside the insulating cover.

[0006] According to some embodiments of the present invention, the high voltage DC relay further includes an auxiliary dynamic spring;

[0007] The mounting structure is provided with a limiting groove; the auxiliary static spring includes a fixed section and a lead-out section, the fixed section is connected to the lead-out section, the free end of the fixed section is the contact end, and the free end of the lead-out section is the lead-out end; a part of the fixed section is limited in the limiting groove, and the part of the fixed section located outside the limiting groove can contact the auxiliary dynamic spring.

[0008] According to some embodiments of the present invention, the auxiliary static spring is a rod-shaped structure; the mounting structure is provided with a guide groove, the guide groove is connected to the limit groove; the extension direction of the guide groove is perpendicular to the extension direction of the limit groove; from the bottom of the guide groove to the groove mouth, the guide groove includes a first groove portion and a second groove portion, the first groove portion is connected to the second groove portion, and the width of the first groove portion is greater than the width of the second groove portion;

[0009] The fixed section includes a round rod portion and a thinned portion. Along the width direction of the guide groove, the width of the thinned portion is smaller than the diameter of the lead-out section, and the width of the thinned portion is adapted to the width of the second groove portion so that the thinned portion can move to the limiting groove along the extension direction of the second groove portion, and the portion of the lead-out section close to the fixed section is located in the first groove portion; the arc surface of the round rod portion located outside the limiting groove can contact the auxiliary dynamic spring.

[0010] According to some embodiments of the present utility model, the high-voltage DC relay further includes a static contact, wherein the static contact is mounted on the top of the insulating cover;

[0011] A vertical distance between the lead-out end and a center line of the static contact is greater than a vertical distance between an end of the lead-out section connected to the fixed section and the center line of the static contact.

[0012] According to some embodiments of the present invention, the fixing hole is arranged at the top of the insulating cover; the lead-out section includes a first connecting section, a second connecting section and a third connecting section, the first connecting section is connected to the fixing section, at least part of the first connecting section is located in the first groove portion, one end of the second connecting section is connected to the first connecting section, the second connecting section extends in a direction away from the center line of the static contact until the other end of the second connecting section is located below the fixing hole, and the third connecting section is passed through the fixing hole in a direction parallel to the center line of the static contact.

[0013] According to some embodiments of the present invention, a positioning structure is provided on the surface of the top of the insulating cover facing the insulating seat, and the positioning structure abuts against the second connecting section to press and fix the part of the auxiliary static spring close to the contact end to the mounting structure.

[0014] According to some embodiments of the present invention, the positioning structure includes a protrusion, and the protrusion abuts against the second connecting section.

[0015] According to some embodiments of the present invention, the auxiliary dynamic spring is located on one side of the fixed section close to the top of the insulating cover, so that the auxiliary dynamic spring and the auxiliary static spring form a normally closed auxiliary contact assembly.

[0016] According to some embodiments of the present invention, the high-voltage DC relay also includes a push rod, the auxiliary dynamic spring is installed on the push rod, the first connecting section is bent at one end away from the fixed section to form an avoidance section, the avoidance section is connected to the second connecting section, the auxiliary dynamic spring has a width direction, and along the width direction of the auxiliary dynamic spring, the avoidance section extends from the first connecting section in a direction away from the push rod, so that the vertical distance between the second connecting section and the axis of the push rod is greater than the distance between the fixed section and the axis of the push rod.

[0017] According to some embodiments of the present invention, the projection of a side edge of the auxiliary dynamic spring away from the push rod in a set plane is located on a side of the projection of the second connecting section in the set plane close to the push rod, wherein the set plane is perpendicular to the axis of the push rod.

[0018] According to some embodiments of the present invention, the lead-out section and the fixed section are integrally formed.

[0019] According to some embodiments of the present invention, the number of the auxiliary static springs is two, and the two auxiliary static springs are respectively a first auxiliary static spring and a second auxiliary static spring;

[0020] The auxiliary dynamic spring includes a first auxiliary dynamic spring, one end of the first auxiliary dynamic spring contacts the fixed section of the first auxiliary static spring, and the other end of the first auxiliary dynamic spring contacts the fixed section of the second auxiliary static spring.

[0021] According to some embodiments of the present invention, the first auxiliary dynamic spring includes a first main body portion, and along an extension direction of the first main body portion, both ends of the first main body portion are bent to form contact segments, and the contact segments formed at both ends of the first main body portion are respectively a first contact segment and a second contact segment;

[0022] The first auxiliary dynamic spring is capable of moving relative to the auxiliary static spring so that the first contact segment and the second contact segment respectively contact the fixed segment of the first auxiliary static spring and the fixed segment of the second auxiliary static spring, or the first contact segment and the second contact segment are respectively separated from the fixed segment of the first auxiliary static spring and the fixed segment of the second auxiliary static spring.

[0023] According to some embodiments of the present invention, the auxiliary dynamic spring further includes a second auxiliary dynamic spring, the second auxiliary dynamic spring being connected to the first auxiliary dynamic spring, and a buffer space being provided between the second auxiliary dynamic spring and the first auxiliary dynamic spring so that the contact segment and the second auxiliary dynamic spring can each undergo elastic deformation;

[0024] One end of the second auxiliary dynamic spring contacts the fixed section of the first auxiliary static spring, and the other end of the second auxiliary dynamic spring contacts the fixed section of the second auxiliary static spring.

[0025] According to some embodiments of the present invention, the second auxiliary dynamic spring includes a second main body portion, and along an extension direction of the second main body portion, both ends of the second main body portion are bent to form bent sections, and the bent sections formed at both ends of the second main body portion are respectively a first bent section and a second bent section;

[0026] The second auxiliary dynamic spring is capable of moving relative to the auxiliary static spring so that the first bending section and the second bending section are respectively in contact with the fixed section of the first auxiliary static spring and the fixed section of the second auxiliary static spring, or the first bending section and the second bending section are respectively separated from the fixed section of the first auxiliary static spring and the fixed section of the second auxiliary static spring.

[0027] According to some embodiments of the present invention, the first bending section and the second bending section are both located between the first contact section and the second contact section, the first contact section and the second contact section extend from the first main body portion toward the direction close to the second main body portion, and the first bending section and the second bending section both extend from the second main body portion toward the direction close to the first main body portion.

[0028] According to some embodiments of the present invention, the fixing section and the contact section are spatially staggered.

[0029] According to some embodiments of the present invention, the high-voltage DC relay also includes a shell and an iron cup, the iron cup is installed inside the shell, the insulating cover and the insulating seat are installed in the iron cup, and a sealant layer is provided between the shell and the iron cup and between the shell and the insulating cover.

[0030] One embodiment of the above utility model has at least the following advantages or beneficial effects:

[0031] (1) In the high-voltage DC relay provided by the embodiment of the present invention, the portion of the auxiliary static spring close to the contact end is installed on the mounting structure, and the portion of the auxiliary static spring close to the lead-out end is passed through the fixing hole to achieve stable installation of the auxiliary static spring. The lead-out end of the auxiliary static spring is located outside the insulating cover to achieve signal detection.

[0032] (2) The high-voltage DC relay provided by the embodiment of the present invention has a mounting structure provided with a limit slot; the auxiliary static spring includes a fixed section and a lead-out section, the fixed section is connected to the lead-out section, the free end of the fixed section is a contact end, and the free end of the lead-out section is a lead-out end; a portion of the fixed section is limited in the limit slot, and the portion of the fixed section outside the limit slot can contact the auxiliary dynamic spring. By limiting and fixing a portion of the fixed section in the limit slot, it is ensured that the fixed section can be stably in the limit slot when in contact with the auxiliary dynamic spring, and is not prone to shaking or displacement, thereby ensuring that the auxiliary dynamic spring can still be reliably in contact with the fixed section after multiple engagements.

[0033] (3) The high-voltage DC relay provided by the embodiment of the present invention has a mounting structure provided with a guide groove, which is connected to the limit groove; the extension direction of the guide groove is perpendicular to the extension direction of the limit groove; the guide groove includes a first groove portion and a second groove portion from the groove bottom to the groove mouth, the first groove portion is connected to the second groove portion, and the width of the first groove portion is greater than the width of the second groove portion; the fixed section includes a round rod portion and a thinning portion, along the width direction of the guide groove, the width of the thinning portion is less than the diameter of the lead section, and the width of the thinning portion is adapted to the width of the second groove portion. The lead section is inserted into the first groove portion and moved along the first groove portion until the fixed section is located in the limit groove. After assembly, the second groove portion can stop the lead section in the first groove portion to prevent the lead section from escaping from the second groove portion along the X-axis direction. At the same time, the thinning portion can adapt to the width of the second groove portion, and the groove wall of the second groove portion can limit the movement of the lead section along the Y-axis direction.

[0034] (4) In the high-voltage DC relay provided by the embodiment of the present invention, the avoidance section in the auxiliary static spring is arranged so that the projection of the side of the auxiliary dynamic spring away from the push rod in the set plane is located on the side of the projection of the second connecting section in the set plane close to the push rod, thereby ensuring that the auxiliary dynamic spring does not interfere with the second connecting section during assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Shown is a schematic structural diagram of a high-voltage DC relay provided by an embodiment of the present utility model;

[0036] Figure 2 Shown is an exploded view of a high-voltage DC relay provided by an embodiment of the present utility model;

[0037] Figure 3 Shown is an exploded view of the auxiliary static spring and the insulating seat;

[0038] Figure 4 Shown is a schematic diagram of a portion of the first connecting section of the auxiliary static spring being inserted into the guide groove;

[0039] Figure 5The figure shows a schematic structural diagram of an auxiliary static spring in a high voltage DC relay provided by an embodiment of the present utility model;

[0040] Figure 6 The figure shows a schematic structural diagram of an auxiliary spring in a high voltage DC relay provided by an embodiment of the present utility model;

[0041] Figure 7 FIG2 shows another structural diagram of an auxiliary dynamic spring in a high-voltage DC relay provided by an embodiment of the present utility model;

[0042] Figure 8 The third structural diagram of the auxiliary dynamic spring in the high-voltage DC relay provided by the embodiment of the utility model is shown;

[0043] Figure 9 The fourth structural diagram of the auxiliary dynamic spring in the high-voltage DC relay provided by the embodiment of the utility model is shown;

[0044] Figure 10 FIG2 shows a fifth structural diagram of an auxiliary dynamic spring in a high-voltage DC relay provided by an embodiment of the present utility model;

[0045] Figure 11 The figure shows the push rod and the push rod in the high voltage DC relay provided by the embodiment of the utility model. Figure 10 A schematic diagram of the structure of the auxiliary dynamic spring shown;

[0046] Figure 12 FIG2 is a schematic diagram showing the deflection of the auxiliary dynamic spring in the high-voltage DC relay provided by an embodiment of the present utility model in the XY plane;

[0047] Figure 13 Shown is Figure 12 A top view of a high voltage DC relay is shown;

[0048] Figure 14 The figure shows a schematic diagram of the auxiliary dynamic spring in the high-voltage DC relay provided by the embodiment of the present utility model rotating a certain angle around a direction parallel to the X-axis;

[0049] Figure 15 Shown is Figure 14 A partial enlarged view of point Ⅰ in the middle;

[0050] Figure 16 The figure shows a schematic diagram of an auxiliary spring in a high-voltage DC relay provided by an embodiment of the present utility model after it has overtraveled;

[0051] Figure 17 Shown is Figure 16 A partial enlarged view of the middle II;

[0052] Figure 18Shown is a top view of a high-voltage DC relay provided by an embodiment of the present utility model (the insulating cover and the sealing adhesive layer are not shown).

[0053] The following are the descriptions of the reference numerals:

[0054] 1-Insulating cover; 11-Protrusion; 2-Insulating seat; 21-Mounting structure; 211-Limiting groove; 2121-First groove portion; 2122-Second groove portion; 3-Auxiliary static spring; 31-Fixed section; 311-Round rod portion; 312-Thinning portion; 32-Leading section; 321-First connecting section; 322-Second connecting section; 323-Third connecting section; 324-Avoidance section; 3a-First auxiliary static spring; 3b-Second auxiliary static spring; 41-first auxiliary dynamic spring; 411-first main body; 412-first contact section; 413-second contact section; 414-first transition section; 42-second auxiliary dynamic spring; 421-second main body; 422-first bending section; 423-second bending section; 424-second transition section; 5-static contact; 6-active spring; 7-yoke iron plate; 8-push rod; 81-fixing part; 9-housing; 10-iron cup; 100-sealing rubber layer. DETAILED DESCRIPTION

[0055] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0056] See also Figures 1 to 18 As shown, this embodiment provides a high-voltage DC relay, including an insulating cover 1, an insulating seat 2 and an auxiliary static spring 3. The insulating cover 1 is connected to the insulating seat 2, and the insulating cover 1 is provided with a fixing hole; a mounting structure 21 is provided on the side of the insulating seat 2 facing the insulating cover 1, and the auxiliary static spring 3 has a contact end and a lead-out end. The part of the auxiliary static spring 3 close to the contact end is installed on the mounting structure 21, and the part of the auxiliary static spring 3 close to the lead-out end is passed through the fixing hole, and the lead-out end is located outside the insulating cover 1.

[0057] The high-voltage DC relay provided in this embodiment installs the part of the auxiliary static spring close to the contact end on the installation structure 21, and passes the part of the auxiliary static spring close to the lead-out end through the fixing hole to achieve stable installation of the auxiliary static spring. The lead-out end of the auxiliary static spring is located outside the insulating cover 1 to achieve signal detection.

[0058] In one embodiment, the high-voltage DC relay also includes a shell 9 and an iron cup 10, the iron cup 10 is installed inside the shell 9, the insulating cover 1 and the insulating seat 2 are installed in the iron cup 10, and a sealant layer 100 is provided between the shell 9 and the iron cup 10 and between the shell 9 and the insulating cover 1.

[0059] The insulating cover 1 is close to the opening of the iron cup 10, and the insulating seat 2 is close to the bottom of the iron cup 10. In this embodiment, the fixing hole is set at the top of the insulating cover 1, and there is no need to punch the side wall of the iron cup 10. The lead-out end of the auxiliary static spring can be directly led out from the top of the insulating cover 1, which is convenient for filling sealant for sealing.

[0060] For example, the sealant layer 100 may be cured epoxy glue.

[0061] For example, the insulating cover 1 may be made of ceramic, and the insulating base 2 and the mounting structure 21 may be made of plastic. The insulating base 2 and the mounting structure 21 may be integrally formed by injection molding.

[0062] It should be noted that when ceramic brazing sealing is adopted, the high voltage DC relay may not be provided with an iron cup. In this case, the fixing hole may be provided on the side wall of the insulating cover, and the auxiliary static spring may pass through the side wall of the insulating cover.

[0063] In one embodiment, the high-voltage DC relay also includes an auxiliary dynamic spring; the mounting structure 21 is provided with a limiting slot 211; the auxiliary static spring includes a fixed section 31 and a lead-out section 32, the fixed section 31 is connected to the lead-out section 32, the free end of the fixed section 31 is a contact end, and the free end of the lead-out section 32 is a lead-out end; a portion of the fixed section 31 is limited in the limiting slot 211, and the portion of the fixed section 31 located outside the limiting slot 211 can contact the auxiliary dynamic spring.

[0064] By limiting and fixing a part of the fixed section 31 in the limiting groove 211, it is ensured that the fixed section 31 can be stably located in the limiting groove 211 when in contact with the auxiliary dynamic spring, and is less likely to shake or shift, thereby ensuring that the auxiliary dynamic spring and the fixed section 31 can still be in reliable contact after multiple engagements.

[0065] In one embodiment, the auxiliary static spring is a rod-shaped structure; the mounting structure 21 is provided with a guide groove, which is connected to the limit groove 211; the extension direction of the guide groove is perpendicular to the extension direction of the limit groove 211; from the bottom of the guide groove to the direction of the groove mouth, the guide groove includes a first groove portion 2121 and a second groove portion 2122, the first groove portion 2121 is connected to the second groove portion 2122, and the width of the first groove portion 2121 is greater than the width of the second groove portion 2122; the fixed section 31 includes a round rod The portion 311 and the thinning portion 312 are configured such that, along the width direction of the guide groove, the width of the thinning portion 312 is smaller than the diameter of the lead-out section 32, and the width of the thinning portion 312 is adapted to the width of the second groove portion 2122, so that the thinning portion 312 can move to the limiting groove 211 along the extension direction of the second groove portion 2122, and the portion of the lead-out section 32 close to the fixed section 31 is located in the first groove portion 2121; the arc surface of the round rod portion 311 located outside the limiting groove 211 can contact the auxiliary dynamic spring.

[0066] For example, during assembly, Figure 3 Install the auxiliary static spring in the mounting structure from top to bottom, following the direction of arrow F. Specifically, insert the lead-out section 32 into the first slot 2121 and move along the first slot 2121 until the fixed section 31 is located in the retaining slot 211. After assembly, the second slot 2122 stops the lead-out section 32 within the first slot 2121, preventing it from escaping from the second slot 2122 along the X-axis. Furthermore, the thinned portion 312 is adapted to the width of the second slot 2122, and the walls of the second slot 2122 limit movement of the lead-out section 32 along the Y-axis.

[0067] In one embodiment, see Figure 2 As shown, the high-voltage DC relay also includes a static contact 5, which is installed on the top of the insulating cover 1; the vertical distance between the lead end and the center line of the static contact 5 is greater than the vertical distance between the end of the lead section 32 connected to the fixed section 31 and the center line of the static contact 5.

[0068] Exemplarily, there are two static contacts 5, one of which serves as a terminal for current inflow and the other serves as a terminal for current outflow, and the static contacts 5 are provided with a main static contact; the high-voltage DC relay also includes an active spring 6, on which an active contact can be provided, and the active contact can contact or separate with the main static contact.

[0069] The bottom of the insulating cover 1 is an open end, and a part of the insulating seat 2 is fixedly installed in the open end; a sealing member is provided between the insulating cover 1 and the insulating seat 2.

[0070] See also Figure 18As shown, the vertical distance d1 between the lead-out end and the center line of the static contact 5 is greater than the vertical distance d2 between the end of the lead-out section 32 connected to the fixed section 31 and the center line of the static contact 5. This can make the lead-out end away from the main static contact, increase the safety distance, and thus improve the strong and weak electrical insulation performance.

[0071] The center line of the static contact 5 refers to the axis of the cylindrical static contact.

[0072] In one embodiment, see Figure 5 As shown, the lead-out section 32 includes a first connecting section 321, a second connecting section 322 and a third connecting section 323. The first connecting section 321 is connected to the fixed section 31. At least a portion of the first connecting section 321 is located in the first groove portion 2121. One end of the second connecting section 322 is connected to the first connecting section 321. The second connecting section 322 extends in a direction away from the center line of the static contact 5 until the other end of the second connecting section 322 is located below the fixing hole. The third connecting section 323 is passed through the fixing hole in a direction parallel to the center line of the static contact 5.

[0073] Exemplarily, the second connecting section 322 is parallel to the fixing section 31, and both the second connecting section 322 and the second connecting section 323 are located on the same side of the first connecting section 321. The other end of the second connecting section 322 is located below the fixing hole, ensuring that the third connecting section 323 is inserted into the fixing hole in a direction parallel to the centerline of the static contact 5. This ensures that the lead-out terminal is away from the main static contact, improving strong and weak electrical insulation performance; at the same time, it also facilitates assembly and improves installation stability.

[0074] It should be understood that if the lead-out section is directly led vertically upward to the outside of the insulating cover, the vertical distance between the lead-out end of the auxiliary static spring and the center line of the static contact 5 is equal to d2. Compared with the scheme of setting the second connecting section so that the third connecting section 323 is passed through the fixing hole in a direction parallel to the center line of the static contact 5, it is closer to the main static contact and the safety distance may not be guaranteed.

[0075] In one embodiment, a positioning structure is provided on the top surface of the insulating cover 1 facing the insulating seat 2 , and the positioning structure abuts against the second connecting section 322 to press and fix the portion of the auxiliary static spring close to the contact end to the mounting structure 21 .

[0076] Specifically, after the insulating cover 1 is mounted on the insulating seat 2 , the positioning structure can abut against the second connecting section 322 , thereby pressing and fixing the fixing section 31 of the auxiliary static spring in the limiting groove 211 .

[0077] See also Figure 1 As shown, the positioning structure includes a protrusion 11 , and the protrusion 11 abuts against the second connecting section 322 .

[0078] Exemplarily, there are multiple protrusions 11. After the insulating cover 1 is installed on the insulating seat 2, the multiple protrusions 11 are spaced apart along the extension direction of the second connecting section 322, so that pressure can be applied to the second connecting section 322 more evenly, further improving the installation stability.

[0079] In one embodiment, an auxiliary movable spring is located on one side of the fixed section 31 near the top of the insulating cover 1, so that the auxiliary movable spring and the auxiliary static spring form a normally closed auxiliary contact assembly. Specifically, the auxiliary movable spring is located between the fixed section 31 and the second connecting section 322. The high-voltage DC relay also includes a yoke plate 7, a push rod 8, a moving iron core, and a static iron core. The insulating base 2 is mounted on the yoke plate 7. The insulating base 2 and the yoke plate 7 are provided with a through hole for the push rod 8 to pass through. One end of the push rod 8 is connected to the moving iron core, and the other end of the push rod 8 is connected to the active spring 6. The auxiliary movable spring moves with the active spring 6.

[0080] When the relay is not powered, the moving iron core and the static iron core are separated, and the active contact and the main static contact are disconnected. At this time, the contact section is in contact with the auxiliary static spring; when the relay is powered, the moving iron core and the static iron core are attracted, and the active contact and the main static contact are closed. At this time, the contact section is separated from the auxiliary static spring.

[0081] In other embodiments, the auxiliary movable spring and auxiliary static spring can also form a normally open contact assembly. When the relay is de-energized, the movable and static iron cores separate, the active contact disconnects from the main static contact, and the contact segment separates from the auxiliary static spring. When the relay is energized, the movable and static iron cores attract, the active contact closes with the main static contact, and the contact segment contacts the auxiliary static spring.

[0082] In one embodiment, the auxiliary dynamic spring is installed on the push rod 8, and the end of the first connecting section 321 away from the fixed section 31 is bent to form an avoidance section 324, and the avoidance section 324 is connected to the second connecting section 322. The auxiliary dynamic spring has a width direction. Along the width direction of the auxiliary dynamic spring, the avoidance section 324 extends from the first connecting section 321 in the direction away from the push rod 8, so that the vertical distance between the second connecting section 322 and the axis of the push rod 8 is greater than the distance between the fixed section 31 and the axis of the push rod 8.

[0083] For example, see Figure 11 As shown, the push rod 8 is integrally formed with a fixing portion 81, and the auxiliary dynamic spring and the fixing portion 81 can be installed together by injection molding. When the push rod 8 drives the active spring 6 to move, the auxiliary dynamic spring moves with the active spring 6. It should be noted that Figures 6 to 9 The auxiliary dynamic spring shown can also be installed on the fixed part 81.

[0084] For example, the width of the auxiliary dynamic spring is perpendicular to the fixed section 31. During assembly, the auxiliary static spring is typically installed first, followed by the push rod 8 with the auxiliary dynamic spring. To prevent interference between the auxiliary dynamic spring and the second connecting section 322 during installation of the push rod 8, a relief section 324 is formed at the end of the first connecting section 321 away from the fixed section 31. This relief section 324 extends from the first connecting section 321 away from the push rod 8 along the width of the auxiliary dynamic spring. This ensures that the vertical distance between the second connecting section 322 and the axis of the push rod 8 is greater than the distance between the fixed section 31 and the axis of the push rod 8, thereby ensuring that the auxiliary dynamic spring can move with the push rod 8 below the second connecting section 322.

[0085] In one embodiment, the projection of one side of the auxiliary dynamic spring away from the push rod 8 in the setting plane is located on the side of the projection of the second connecting section 322 in the setting plane close to the push rod 8, wherein the setting plane is perpendicular to the axis of the push rod 8.

[0086] Because push rod 8 reciprocates under the influence of the core, a certain clearance exists between the circumferential surface of push rod 8 and the walls of the through-holes in insulating seat 2 and yoke iron plate 7, but this clearance should not be too large. Push rod 8 is tilted slightly before downward assembly to ensure that the auxiliary dynamic spring does not interfere with the second connecting section 322. Regardless of whether push rod 8 is tilted, as long as the projection of the side of the auxiliary dynamic spring away from push rod 8 in the set plane is located on the side of the projection of the second connecting section 322 in the set plane closer to push rod 8, the auxiliary dynamic spring can be guaranteed not to interfere with the second connecting section 322 during assembly.

[0087] In one embodiment, the lead-out section 32 is integrally formed with the fixed section 31. This method is easy to process, and can improve the overall structural strength of the auxiliary static spring and reduce the risk of breakage.

[0088] In one embodiment, there are two auxiliary static springs, designated as a first auxiliary static spring 3a and a second auxiliary static spring 3b. The auxiliary dynamic spring includes a first auxiliary dynamic spring 41. One end of the first auxiliary dynamic spring 41 contacts or separates from the fixed section 31 of the first auxiliary static spring 3a, while the other end of the first auxiliary dynamic spring 41 contacts or separates from the fixed section 31 of the second auxiliary static spring 3b. This forms a bridge-type auxiliary contact structure. Specifically, when the relay is not powered on, the moving iron core and the static iron core are separated, and the active contact and the main static contact are disconnected. At this time, one end of the first auxiliary dynamic spring 41 is in contact with the first auxiliary static spring 3a, and the other end of the first auxiliary dynamic spring 41 is in contact with the second auxiliary static spring 3b; when the relay is powered on, the moving iron core and the static iron core are attracted, and the moving iron core drives the push rod 8 to move, and the push rod 8 drives the active spring 6 to move, so that the active contact and the main static contact are closed; at the same time, the push rod 8 can also drive the first auxiliary dynamic spring 41 to move, so that one end of the first auxiliary dynamic spring 41 is separated from the first auxiliary static spring 3a, and the other end of the first auxiliary dynamic spring 41 is separated from the second auxiliary static spring 3b.

[0089] In one embodiment, the first auxiliary dynamic spring 41 includes a first main body portion 411. Along the extension direction of the first main body portion 411, both ends of the first main body portion 411 are bent to form contact sections, and the contact sections formed at both ends of the first main body portion 411 are respectively a first contact section 412 and a second contact section 413; the first auxiliary dynamic spring 41 can move relative to the auxiliary static spring so that the first contact section 412 and the second contact section 413 respectively contact the fixed section 31 of the first auxiliary static spring 3a and the fixed section 31 of the second auxiliary static spring 3b, or the first contact section 412 and the second contact section 413 are respectively separated from the fixed section 31 of the first auxiliary static spring 3a and the fixed section 31 of the second auxiliary static spring 3b.

[0090] When the relay is not powered on, the moving iron core and the static iron core are separated, and the active contact and the main static contact are disconnected. At this time, the first contact segment 412 contacts the first auxiliary static spring 3a, and the second contact segment 413 contacts the second auxiliary static spring 3b; when the relay is powered on, the moving iron core and the static iron core are attracted, the moving iron core drives the push rod 8 to move, and the push rod 8 drives the active spring 6 to move, so that the active contact and the main static contact are closed; at the same time, the push rod 8 can also drive the first auxiliary moving spring 41 to move, so that the first contact segment 412 is separated from the first auxiliary static spring 3a, and the second contact segment 413 is separated from the second auxiliary static spring 3b.

[0091] In one embodiment, the auxiliary dynamic spring further includes a second auxiliary dynamic spring 42, which is connected to the first auxiliary dynamic spring 41. A buffer space is provided between the second auxiliary dynamic spring 42 and the first auxiliary dynamic spring 41, allowing the contact section and the second auxiliary dynamic spring 42 to undergo elastic deformation. One end of the second auxiliary dynamic spring 42 contacts the fixed section 31 of the first auxiliary static spring 3a, while the other end of the second auxiliary dynamic spring 42 contacts the fixed section 31 of the second auxiliary static spring 3b. This creates a bridge-type multi-contact parallel connection, further improving contact reliability.

[0092] In one embodiment, the second auxiliary dynamic spring 42 includes a second main body 421. Both ends of the second main body 421 are bent along their extension direction to form bent sections. These bent sections are respectively a first bent section 422 and a second bent section 423. The second auxiliary dynamic spring 42 is movable relative to the auxiliary static spring, such that the first bent section 422 and the second bent section 423 respectively contact the fixed sections 31 and 31 of the first and second auxiliary static springs 3a and 3b, or separate from the fixed sections 31 and 31 of the first and second auxiliary static springs 3a and 3b, respectively. This not only forms a bridge-type multi-contact parallel connection, further improving contact reliability, but also makes the overall structure more compact.

[0093] When the relay is not powered on, the moving iron core and the static iron core are separated, and the active contact and the main static contact are disconnected. At this time, the first contact section 412 contacts the first auxiliary static spring 3a, the second contact section 413 contacts the second auxiliary static spring 3b, the first bending section 422 contacts the first auxiliary static spring 3a, and the second bending section 423 contacts the second auxiliary static spring 3b; when the relay is powered on, the moving iron core and the static iron core are attracted, the moving iron core drives the push rod 8 to move, and the push rod 8 drives the active spring 6 to move, so that the active contact and the main static contact are closed; at the same time, the push rod 8 can also drive the first auxiliary dynamic spring 41 and the second auxiliary dynamic spring 42 to move, so that the first contact section 412 is separated from the first auxiliary static spring 3a, the second contact section 413 is separated from the second auxiliary static spring 3b, the first bending section 422 is separated from the first auxiliary static spring 3a, and the second bending section 423 is separated from the second auxiliary static spring 3b.

[0094] In one embodiment, the first bent section 422 and the second bent section 423 are both located between the first contact section 412 and the second contact section 413. The first contact section 412 and the second contact section 413 extend from the first main body 411 toward the second main body 421. The first bent section 422 and the second bent section 423 both extend from the second main body 421 toward the first main body 411. This makes the first auxiliary dynamic spring 41 and the second auxiliary dynamic spring 42 more compact, the stress at the root is more dispersed, and the risk of interference between the contact section and the bent section when they undergo elastic deformation is reduced.

[0095] See also Figure 17 As shown, at least part of the buffer space is formed between the second main body portion 421 and the first main body portion 411, and the second bending section 423 is spaced apart from the second contact section 413, so that the second bending section 423 and the second contact section 413 form a parallel and independent force arm, and the movement fulcrum of the second contact section 413 is the overlap point N between the position of the second contact section 413 close to the end of the auxiliary static spring and the auxiliary static spring, and the movement fulcrum of the second bending section 423 is the overlap point M between the position of the second bending section 423 close to the end of the auxiliary static spring and the auxiliary static spring, thereby effectively reducing the degree of deformation and warping, so that the contact section and the bending section can be in reliable contact with the auxiliary static spring.

[0096] See also Figure 10 、 Figure 16 and Figure 17 As shown, during the overtravel of the first auxiliary dynamic spring and the second auxiliary dynamic spring, even if the bent section tilts up, the contact section is likely to maintain reliable contact with the auxiliary static spring.

[0097] In one embodiment, the fixed segments 31 and the contact segments are spatially staggered. The contact surface between the fixed segments 31 and the contact segments is a circular arc. This not only improves the contact reliability between the auxiliary static spring and the first auxiliary dynamic spring, but also ensures that the first auxiliary dynamic spring maintains contact and conduction with the auxiliary static spring even when the first auxiliary dynamic spring is rotated and offset by a certain angle.

[0098] In this embodiment, the length direction of the relay is taken as the X-axis, the height direction of the relay is taken as the Z-axis, and the direction perpendicular to the X-axis and the Z-axis is taken as the Y-axis. Since the push rod 8 may tilt or rotate around its own axis during movement, the first auxiliary dynamic spring 41 may move in multiple directions while the push rod 8 drives the first auxiliary dynamic spring 41 to move along the Z-axis, thereby deviating from the Z-axis. For example, the first auxiliary dynamic spring 41 may deflect within the XY plane formed by the X-axis and the Y-axis. For another example, after the contact section contacts the auxiliary static spring, in order to ensure close contact between the two and continue to move in the overtravel process, the first auxiliary dynamic spring 41 will rotate a certain angle around the direction parallel to the X-axis.

[0099] In the above cases, the contact section can reliably contact the auxiliary static spring.

[0100] It should be understood that the height direction of the relay is related to the placement of the relay (such as vertical or horizontal), and the snapping direction of the first auxiliary dynamic spring 41 and the auxiliary static spring approaching each other is basically consistent with the height direction of the relay.

[0101] Specifically, see Figure 12 and Figure 13 As shown, taking the first auxiliary static spring 3a and the first contact segment 412 as an example, along the axial direction of the push rod 8, the first contact segment 412 is located above the first auxiliary static spring 3a, and the projections of the first contact segment 412 and the first auxiliary static spring 3a in the XY plane intersect. For example, the projections of the first contact segment 412 and the first auxiliary static spring 3a in the XY plane are substantially perpendicular. This is equivalent to increasing the contact area between the first contact segment 412 and the first auxiliary static spring 3a. When the first auxiliary dynamic spring 41 may deflect within the plane formed by the X-axis and the Y-axis, or when the contact segment contacts the auxiliary static spring and goes through an overtravel process, the first auxiliary dynamic spring 41 rotates a certain angle around the direction parallel to the X-axis (such as Figure 14 and Figure 15 As shown), the contact sections can all make reliable contact with the auxiliary static springs.

[0102] In one embodiment, a portion between two ends of the first main body 411 is bent to form a first transition section 414 , and the first transition section 414 is installed inside the relay.

[0103] In some embodiments, see Figure 10 and Figure 11 As shown, the first transition section 414 is installed on the fixing portion 81. Exemplarily, the first transition section 414 includes a transverse section and vertical sections connected to both ends of the transverse section. The transverse section can be fixedly connected to the fixing portion 81 by injection molding.

[0104] By providing the first transition section 414 , the deformation capability of the first main body portion 411 can be increased, the contact reliability can be further improved, and the risk of fatigue fracture of the first main body portion 411 can be reduced.

[0105] Exemplarily, the width of the free end of the contact segment is smaller than the width of the bend of the first transition segment 414 , thereby improving fatigue resistance and deformation capability.

[0106] In some embodiments, see Figure 10 As shown, a portion between the two ends of the second main body 421 is bent to form a second transition section 424 , and the second transition section 424 is installed inside the relay.

[0107] In this embodiment, the structure of the second transition section 424 is basically the same as the structure of the first transition section 414, and the middle position of the transverse section of the first transition section 414 is connected to the middle position of the transverse section of the second transition section 424, which facilitates assembly, that is, it is convenient to injection mold the first transition section 414 and the second transition section 424 at the same time with the fixing part 81.

[0108] Finally, it should be noted that: it is understandable that the various embodiments / implementations provided by the present invention can be combined with each other without causing any contradiction, and will not be illustrated one by one here.

[0109] In the embodiments of the utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be understood to indicate or imply relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. Terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediary. For those skilled in the art, the specific meanings of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0110] In the description of the utility model embodiments, it should be understood that the terms "up", "down", "left", "right", "front", "back", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model embodiments and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it cannot be understood as a limitation on the utility model embodiments.

[0111] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0112] The above are merely preferred embodiments of the utility model and are not intended to limit the utility model. Those skilled in the art will readily appreciate that various modifications and variations of the utility model embodiments are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the utility model embodiments shall be included within the scope of protection of the utility model embodiments.

Claims

1. A high voltage DC relay, characterized in that: It includes an insulating cover, an insulating seat and an auxiliary static spring, the insulating cover is connected to the insulating seat, and the insulating cover is provided with a fixing hole; the insulating seat is provided with a mounting structure on the side facing the insulating cover, the auxiliary static spring has a contact end and a lead-out end, the part of the auxiliary static spring close to the contact end is installed on the mounting structure, the part of the auxiliary static spring close to the lead-out end is passed through the fixing hole, and the lead-out end is located outside the insulating cover.

2. The high-voltage DC relay according to claim 1, characterized in that: Also includes an auxiliary dynamic spring; The mounting structure is provided with a limiting groove; the auxiliary static spring includes a fixed section and a lead-out section, the fixed section is connected to the lead-out section, the free end of the fixed section is the contact end, and the free end of the lead-out section is the lead-out end; a part of the fixed section is limited in the limiting groove, and the part of the fixed section located outside the limiting groove can contact the auxiliary dynamic spring.

3. The high voltage DC relay according to claim 2, characterized in that: The auxiliary static spring is a rod-shaped structure; the mounting structure is provided with a guide groove, the guide groove is connected to the limit groove; the extension direction of the guide groove is perpendicular to the extension direction of the limit groove; from the groove bottom to the groove mouth, the guide groove includes a first groove portion and a second groove portion, the first groove portion is connected to the second groove portion, and the width of the first groove portion is greater than the width of the second groove portion; The fixed section includes a round rod portion and a thinned portion. Along the width direction of the guide groove, the width of the thinned portion is smaller than the diameter of the lead-out section, and the width of the thinned portion is adapted to the width of the second groove portion so that the thinned portion can move to the limiting groove along the extension direction of the second groove portion, and the portion of the lead-out section close to the fixed section is located in the first groove portion; the arc surface of the round rod portion located outside the limiting groove can contact the auxiliary dynamic spring.

4. The high-voltage DC relay according to claim 3, characterized in that: Also included is a static contact, which is mounted on the top of the insulating cover; A vertical distance between the lead-out end and a center line of the static contact is greater than a vertical distance between an end of the lead-out section connected to the fixed section and the center line of the static contact.

5. The high-voltage DC relay according to claim 4, characterized in that: The fixing hole is arranged at the top of the insulating cover; the lead-out section includes a first connecting section, a second connecting section and a third connecting section, the first connecting section is connected to the fixing section, at least a portion of the first connecting section is located in the first groove portion, one end of the second connecting section is connected to the first connecting section, the second connecting section extends in a direction away from the center line of the static contact until the other end of the second connecting section is located below the fixing hole, and the third connecting section is passed through the fixing hole in a direction parallel to the center line of the static contact.

6. The high-voltage DC relay according to claim 5, characterized in that: A positioning structure is provided on the surface of the top of the insulating cover facing the insulating seat, and the positioning structure abuts against the second connecting section to press and fix the portion of the auxiliary static spring close to the contact end to the mounting structure.

7. The high-voltage DC relay according to claim 6, characterized in that: The positioning structure includes a protrusion, and the protrusion abuts against the second connecting section.

8. The high-voltage DC relay according to claim 2, characterized in that: The auxiliary dynamic spring is located on one side of the fixed section close to the top of the insulating cover, so that the auxiliary dynamic spring and the auxiliary static spring form a normally closed auxiliary contact assembly.

9. The high-voltage DC relay according to claim 5, characterized in that: It also includes a push rod, the auxiliary dynamic spring is installed on the push rod, the first connecting section is bent at one end away from the fixed section to form an avoidance section, the avoidance section is connected to the second connecting section, the auxiliary dynamic spring has a width direction, along the width direction of the auxiliary dynamic spring, the avoidance section extends from the first connecting section in a direction away from the push rod, so that the vertical distance between the second connecting section and the axis of the push rod is greater than the distance between the fixed section and the axis of the push rod.

10. The high-voltage DC relay according to claim 9, characterized in that: The projection of one side of the auxiliary dynamic spring away from the push rod in the setting plane is located on the side of the projection of the second connecting section in the setting plane close to the push rod, wherein the setting plane is perpendicular to the axis of the push rod.

11. The high-voltage DC relay according to claim 2, characterized in that: The lead-out section and the fixed section are integrally formed.

12. The high-voltage DC relay according to any one of claims 2 to 11, characterized in that: There are two auxiliary static springs, and the two auxiliary static springs are respectively a first auxiliary static spring and a second auxiliary static spring; The auxiliary dynamic spring includes a first auxiliary dynamic spring, one end of the first auxiliary dynamic spring contacts the fixed section of the first auxiliary static spring, and the other end of the first auxiliary dynamic spring contacts the fixed section of the second auxiliary static spring.

13. The high-voltage DC relay according to claim 12, characterized in that: The first auxiliary dynamic spring includes a first main body portion. Along the extension direction of the first main body portion, both ends of the first main body portion are bent to form contact segments, and the contact segments formed at both ends of the first main body portion are respectively a first contact segment and a second contact segment; The first auxiliary dynamic spring is capable of moving relative to the auxiliary static spring so that the first contact segment and the second contact segment respectively contact the fixed segment of the first auxiliary static spring and the fixed segment of the second auxiliary static spring, or the first contact segment and the second contact segment are respectively separated from the fixed segment of the first auxiliary static spring and the fixed segment of the second auxiliary static spring.

14. The high-voltage DC relay according to claim 13, characterized in that: The auxiliary dynamic spring further includes a second auxiliary dynamic spring, the second auxiliary dynamic spring being connected to the first auxiliary dynamic spring, and a buffer space being provided between the second auxiliary dynamic spring and the first auxiliary dynamic spring so that the contact section and the second auxiliary dynamic spring can respectively undergo elastic deformation; One end of the second auxiliary dynamic spring contacts the fixed section of the first auxiliary static spring, and the other end of the second auxiliary dynamic spring contacts the fixed section of the second auxiliary static spring.

15. The high-voltage DC relay according to claim 14, characterized in that: The second auxiliary dynamic spring includes a second main body portion, and along the extension direction of the second main body portion, both ends of the second main body portion are bent to form bent sections, and the bent sections formed at both ends of the second main body portion are respectively a first bent section and a second bent section; The second auxiliary dynamic spring is capable of moving relative to the auxiliary static spring so that the first bending section and the second bending section are respectively in contact with the fixed section of the first auxiliary static spring and the fixed section of the second auxiliary static spring, or the first bending section and the second bending section are respectively separated from the fixed section of the first auxiliary static spring and the fixed section of the second auxiliary static spring.

16. The high-voltage DC relay according to claim 15, characterized in that: The first bending section and the second bending section are both located between the first contact section and the second contact section, the first contact section and the second contact section extend from the first main body portion toward the direction close to the second main body portion, and the first bending section and the second bending section both extend from the second main body portion toward the direction close to the first main body portion.

17. The high-voltage DC relay according to claim 13, characterized in that: The fixing section and the contact section are spatially staggered.

18. The high-voltage DC relay according to any one of claims 1 to 11, characterized in that: It also includes a shell and an iron cup, the iron cup is installed inside the shell, the insulating cover and the insulating seat are installed in the iron cup, and a sealing glue layer is provided between the shell and the iron cup and between the shell and the insulating cover.

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